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This book presents a comparison of solar cell materials, including both new materials based on organics, nanostructures and novel inorganics and developments in more traditional photovoltaic materials.
It surveys the materials and materials trends in the field including third generation solar cells (multiple energy level cells, thermal approaches and the modification of the solar spectrum) with an eye firmly on low costs, energy efficiency and the use of abundant non-toxic materials.
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This book presents a comparison of solar cell materials, including both new materials based on organics, nanostructures and novel inorganics and developments in more traditional photovoltaic materials.
It surveys the materials and materials trends in the field including third generation solar cells (multiple energy level cells, thermal approaches and the modification of the solar spectrum) with an eye firmly on low costs, energy efficiency and the use of abundant non-toxic materials.
It surveys the materials and materials trends in the field including third generation solar cells (multiple energy level cells, thermal approaches and the modification of the solar spectrum) with an eye firmly on low costs, energy efficiency and the use of abundant non-toxic materials.
Produktdetails
- Produktdetails
- Wiley Series in Materials for Electronic & Optoelectronic Applications
- Verlag: Wiley & Sons
- 1. Auflage
- Seitenzahl: 344
- Erscheinungstermin: 3. März 2014
- Englisch
- Abmessung: 250mm x 175mm x 23mm
- Gewicht: 686g
- ISBN-13: 9780470065518
- ISBN-10: 0470065516
- Artikelnr.: 39374042
- Wiley Series in Materials for Electronic & Optoelectronic Applications
- Verlag: Wiley & Sons
- 1. Auflage
- Seitenzahl: 344
- Erscheinungstermin: 3. März 2014
- Englisch
- Abmessung: 250mm x 175mm x 23mm
- Gewicht: 686g
- ISBN-13: 9780470065518
- ISBN-10: 0470065516
- Artikelnr.: 39374042
Dr. Gavin Conibeer is Deputy Director of the Centre of Excellence for Advanced Silicon Photovoltaics and Photonics at the University of New South Wales (UNSW, Australia). He has a BSc (Eng) and MSc (London) and received his PhD at Southampton University (UK). His research interests include third generation photovoltaics, hot carrier cooling in semiconductors, phonon dispersion modulation in nanostructures, high efficiency thermoelectric devices and photoelectrochemical generation of hydrogen. As well as numerous publications, Dr. Conibeer has also given a short course on Third Generation Photovoltaics at UNSW and a unit on Photovoltaics for the Open University (UK). Professor Arthur Willoughby is currently Professor Emeritus at the University of Southampton having retired from Southampton after many years teaching. He holds a BSc and PhD in Engineering, both from Imperial College, and was head of Engineering Materials at Southampton for more than 10 years. With research interests focussed around semiconductor materials, Arthur Willoughby is founding editor of Journal of Materials Science: Materials in Electronics for Springer as well as principal editor for Materials Letters for Elsevier. He has written multiple journal articles as well as book chapters for Springer and MRS, and is a series editor for the Wiley Series in Materials for Electronic and Optoelectronic Applications.
List of Contributors xiii Series Preface xv Preface xvii Acknowledgements
xix Abbreviations xxi 1 Introduction 1 Gavin Conibeer and Arthur Willoughby
1.1 Introduction 1 1.2 The Sun 1 1.3 Book Outline 3 References 4 2
Fundamental Physical Limits to Photovoltaic Conversion 5 J.F. Guillemoles
2.1 Introduction 5 2.2 Thermodynamic Limits 8 2.2.1 The Sun is the Limit 9
2.2.2 Classical Thermodynamics Analysis of Solar Energy Conversion 10 2.3
Limitations of Classical Devices 12 2.3.1 Detailed Balance and Main
Assumptions 13 2.3.2 p-n Junction 14 2.3.3 The Two-Level System Model 17
2.3.4 Multijunctions 19 2.4 Fundamental Limits of some High-Efficiency
Concepts 23 2.4.1 Beyond Unity Quantum Efficiency 24 2.4.2 Beyond
Isothermal Conversion: Hot-Carrier Solar Cells (HCSC) 29 2.4.3 Beyond the
Single Process/ Photon: Photon Conversion 32 2.5 Conclusion 33 References
33 3 Physical Characterisation of Photovoltaic Materials 37 Daniel Bellet
and Edith Bellet-Amalric 3.1 Introduction 37 3.2 Correspondence between
Photovoltaic Materials Characterisation Needs and Physical Techniques 37
3.3 X-Ray Techniques 38 3.3.1 X-Ray Diffraction (XRD) 39 3.3.2
Grazing-Incidence X-Ray Diffraction (GIXRD) 42 3.3.3 X-Ray Reflectivity
(XRR) 44 3.3.4 Other X-Ray Techniques 46 3.4 Electron Microscopy Methods 47
3.4.1 Electron-Specimen Interactions and Scanning Electron Microscopy (SEM)
50 3.4.2 Electron Backscattering Diffraction (EBSD) 51 3.4.3 Transmission
Electron Microscopy (TEM) 53 3.4.4 Electron Energy Loss Spectroscopy (EELS)
54 3.5 Spectroscopy Methods 55 3.5.1 X-Ray Photoelectron Spectroscopy (XPS)
55 3.5.2 Secondary Ion Mass Spectrometry (SIMS) 57 3.5.3 Rutherford
Backscattering Spectrometry (RBS) 58 3.5.4 Raman Spectroscopy 58 3.5.5
UV-VIS-NIR Spectroscopy 60 3.6 Concluding Remarks and Perspectives 61
Acknowledgements 62 References 62 4 Developments in Crystalline Silicon
Solar Cells 67 Martin A. Green 4.1 Introduction 67 4.2 Present Market
Overview 68 4.3 Silicon Wafers 69 4.3.1 Standard Process 69 4.3.2
Multicrystalline Silicon Ingots 72 4.3.3 Ribbon Silicon 73 4.4 Cell
Processing 75 4.4.1 Screen-Printed Cells 75 4.4.2 Buried-Contact and Laser
Doped, Selective-Emitter Solar Cells 78 4.4.3 HIT Cell 79 4.4.4
Rear-Contact Cell 80 4.4.5 PERL Solar Cell 81 4.5 Conclusion 84
Acknowledgement 84 References 84 5 Amorphous and Microcrystalline Silicon
Solar Cells 87 R.E.I. Schropp 5.1 Introduction 87 5.2 Deposition Methods 89
5.2.1 Modifications of Direct PECVD Techniques 90 5.2.2 Remote PECVD
Techniques 91 5.2.3 Inline HWCVD Deposition 93 5.3 Material Properties 93
5.3.1 Protocrystalline Silicon 94 5.3.2 Microcrystalline or Nanocrystalline
Silicon 95 5.4 Single-Junction Cell 98 5.4.1 Amorphous (Protocrystalline)
Silicon Cells 100 5.4.2 Microcrystalline (c-Si:H) Silicon Cells 101 5.4.3
Higher Deposition Rate 103 5.5 Multijunction Cells 104 5.6 Modules and
Production 105 5.6 Acknowledgments 108 References 108 6 III-V Solar Cells
115 N.J. Ekins-Daukes 6.1 Introduction 115 6.2 Homo- and Heterojunction
III-V Solar Cells 117 6.2.1 GaAs Solar Cells 119 6.2.2 InP Solar Cells 122
6.2.3 InGaAsP 123 6.2.4 GaN 123 6.3 Multijunction Solar Cells 124 6.3.1
Monolithic Multijunction Solar Cells 125 6.3.2 Mechanically Stacked
Multijunction Solar Cells 131 6.4 Applications 133 6.4.1 III-V Space
Photovoltaic Systems 133 6.4.2 III-V Concentrator Photovoltaic Systems 134
6.5 Conclusion 136 References 136 7 Chalcogenide Thin-Film Solar Cells 147
M. Paire, S. Delbos, J. Vidal, N. Naghavi, and J.F. Guillemoles 7.1
Introduction 147 7.2 CIGS 150 7.2.1 Device Fabrication 150 7.2.2 Material
Properties 164 7.2.3 Device Properties 173 7.2.4 Outlook 183 7.3 Kesterites
187 7.3.1 Advantages of CZTS 187 7.3.2 Crystallographic and Optoelectronic
Properties 189 7.3.3 Synthesis Strategies 192 Acknowledgements 198
References 198 8 Printed Organic Solar Cells 217 Claudia Hoth, Andrea
Seemann, Roland Steim, Tayebeh Ameri, Hamed Azimi, and Christoph J. Brabec
8.1 Introduction 217 8.2 Materials and Morphology 218 8.2.1 Organic
Semiconductors 219 8.2.2 Control of Morphology in oBHJ Solar Cells 224
8.2.3 Monitoring Morphology 233 8.2.4 Numerical Simulations of Morphology
235 8.2.5 Alternative Approaches to Control the Morphology 235 8.3
Interfaces in Organic Photovoltaics 237 8.3.1 Origin of Voc 237 8.3.2
Determination of Polarity-Inverted and Noninverted Structure 238 8.3.3
Optical Spacer 239 8.3.4 Protection Layer between the Electrode and the
Polymer 240 8.3.5 Selective Contact 240 8.3.6 Interface Material Review for
OPV Cells 240 8.4 Tandem Technology 243 8.4.1 Theoretical Considerations
243 8.4.2 Review of Experimental Results 248 8.4.3 Design Rules for Donors
in Bulk-Heterojunction Tandem Solar Cells 255 8.5 Electrode Requirements
for Organic Solar Cells 257 8.5.1 Materials for Transparent Electrodes 258
8.5.2 Materials for Nontransparent Electrodes 263 8.6 Production of Organic
Solar Cells 265 8.7 Summary and Outlook 273 References 273 9
Third-Generation Solar Cells 283 Gavin Conibeer 9.1 Introduction 283 9.2
Multiple-Energy-Level Approaches 285 9.2.1 Tandem Cells 285 9.2.2
Multiple-Exciton Generation (MEG) 291 9.2.3 Intermediate-Band Solar Cells
(IBSC) 293 9.3 Modification of the Solar Spectrum 294 9.3.1 Downconversion,
QE > 1 294 9.3.2 Upconversion of Below-Bandgap Photons 297 9.4 Thermal
Approaches 302 9.4.1 Thermophotovoltaics (TPV) 303 9.4.2 Thermophotonics
303 9.4.3 Hot-Carrier Cells 303 9.5 Other Approaches 308 9.5.1
Nonreciprocal Devices 308 9.5.2 Quantum Antennae - Light as a Wave 308 9.6
Conclusions 309 Acknowledgements 309 References 310 Concluding Remarks 315
Gavin Conibeer and Arthur Willoughby Index 319
xix Abbreviations xxi 1 Introduction 1 Gavin Conibeer and Arthur Willoughby
1.1 Introduction 1 1.2 The Sun 1 1.3 Book Outline 3 References 4 2
Fundamental Physical Limits to Photovoltaic Conversion 5 J.F. Guillemoles
2.1 Introduction 5 2.2 Thermodynamic Limits 8 2.2.1 The Sun is the Limit 9
2.2.2 Classical Thermodynamics Analysis of Solar Energy Conversion 10 2.3
Limitations of Classical Devices 12 2.3.1 Detailed Balance and Main
Assumptions 13 2.3.2 p-n Junction 14 2.3.3 The Two-Level System Model 17
2.3.4 Multijunctions 19 2.4 Fundamental Limits of some High-Efficiency
Concepts 23 2.4.1 Beyond Unity Quantum Efficiency 24 2.4.2 Beyond
Isothermal Conversion: Hot-Carrier Solar Cells (HCSC) 29 2.4.3 Beyond the
Single Process/ Photon: Photon Conversion 32 2.5 Conclusion 33 References
33 3 Physical Characterisation of Photovoltaic Materials 37 Daniel Bellet
and Edith Bellet-Amalric 3.1 Introduction 37 3.2 Correspondence between
Photovoltaic Materials Characterisation Needs and Physical Techniques 37
3.3 X-Ray Techniques 38 3.3.1 X-Ray Diffraction (XRD) 39 3.3.2
Grazing-Incidence X-Ray Diffraction (GIXRD) 42 3.3.3 X-Ray Reflectivity
(XRR) 44 3.3.4 Other X-Ray Techniques 46 3.4 Electron Microscopy Methods 47
3.4.1 Electron-Specimen Interactions and Scanning Electron Microscopy (SEM)
50 3.4.2 Electron Backscattering Diffraction (EBSD) 51 3.4.3 Transmission
Electron Microscopy (TEM) 53 3.4.4 Electron Energy Loss Spectroscopy (EELS)
54 3.5 Spectroscopy Methods 55 3.5.1 X-Ray Photoelectron Spectroscopy (XPS)
55 3.5.2 Secondary Ion Mass Spectrometry (SIMS) 57 3.5.3 Rutherford
Backscattering Spectrometry (RBS) 58 3.5.4 Raman Spectroscopy 58 3.5.5
UV-VIS-NIR Spectroscopy 60 3.6 Concluding Remarks and Perspectives 61
Acknowledgements 62 References 62 4 Developments in Crystalline Silicon
Solar Cells 67 Martin A. Green 4.1 Introduction 67 4.2 Present Market
Overview 68 4.3 Silicon Wafers 69 4.3.1 Standard Process 69 4.3.2
Multicrystalline Silicon Ingots 72 4.3.3 Ribbon Silicon 73 4.4 Cell
Processing 75 4.4.1 Screen-Printed Cells 75 4.4.2 Buried-Contact and Laser
Doped, Selective-Emitter Solar Cells 78 4.4.3 HIT Cell 79 4.4.4
Rear-Contact Cell 80 4.4.5 PERL Solar Cell 81 4.5 Conclusion 84
Acknowledgement 84 References 84 5 Amorphous and Microcrystalline Silicon
Solar Cells 87 R.E.I. Schropp 5.1 Introduction 87 5.2 Deposition Methods 89
5.2.1 Modifications of Direct PECVD Techniques 90 5.2.2 Remote PECVD
Techniques 91 5.2.3 Inline HWCVD Deposition 93 5.3 Material Properties 93
5.3.1 Protocrystalline Silicon 94 5.3.2 Microcrystalline or Nanocrystalline
Silicon 95 5.4 Single-Junction Cell 98 5.4.1 Amorphous (Protocrystalline)
Silicon Cells 100 5.4.2 Microcrystalline (c-Si:H) Silicon Cells 101 5.4.3
Higher Deposition Rate 103 5.5 Multijunction Cells 104 5.6 Modules and
Production 105 5.6 Acknowledgments 108 References 108 6 III-V Solar Cells
115 N.J. Ekins-Daukes 6.1 Introduction 115 6.2 Homo- and Heterojunction
III-V Solar Cells 117 6.2.1 GaAs Solar Cells 119 6.2.2 InP Solar Cells 122
6.2.3 InGaAsP 123 6.2.4 GaN 123 6.3 Multijunction Solar Cells 124 6.3.1
Monolithic Multijunction Solar Cells 125 6.3.2 Mechanically Stacked
Multijunction Solar Cells 131 6.4 Applications 133 6.4.1 III-V Space
Photovoltaic Systems 133 6.4.2 III-V Concentrator Photovoltaic Systems 134
6.5 Conclusion 136 References 136 7 Chalcogenide Thin-Film Solar Cells 147
M. Paire, S. Delbos, J. Vidal, N. Naghavi, and J.F. Guillemoles 7.1
Introduction 147 7.2 CIGS 150 7.2.1 Device Fabrication 150 7.2.2 Material
Properties 164 7.2.3 Device Properties 173 7.2.4 Outlook 183 7.3 Kesterites
187 7.3.1 Advantages of CZTS 187 7.3.2 Crystallographic and Optoelectronic
Properties 189 7.3.3 Synthesis Strategies 192 Acknowledgements 198
References 198 8 Printed Organic Solar Cells 217 Claudia Hoth, Andrea
Seemann, Roland Steim, Tayebeh Ameri, Hamed Azimi, and Christoph J. Brabec
8.1 Introduction 217 8.2 Materials and Morphology 218 8.2.1 Organic
Semiconductors 219 8.2.2 Control of Morphology in oBHJ Solar Cells 224
8.2.3 Monitoring Morphology 233 8.2.4 Numerical Simulations of Morphology
235 8.2.5 Alternative Approaches to Control the Morphology 235 8.3
Interfaces in Organic Photovoltaics 237 8.3.1 Origin of Voc 237 8.3.2
Determination of Polarity-Inverted and Noninverted Structure 238 8.3.3
Optical Spacer 239 8.3.4 Protection Layer between the Electrode and the
Polymer 240 8.3.5 Selective Contact 240 8.3.6 Interface Material Review for
OPV Cells 240 8.4 Tandem Technology 243 8.4.1 Theoretical Considerations
243 8.4.2 Review of Experimental Results 248 8.4.3 Design Rules for Donors
in Bulk-Heterojunction Tandem Solar Cells 255 8.5 Electrode Requirements
for Organic Solar Cells 257 8.5.1 Materials for Transparent Electrodes 258
8.5.2 Materials for Nontransparent Electrodes 263 8.6 Production of Organic
Solar Cells 265 8.7 Summary and Outlook 273 References 273 9
Third-Generation Solar Cells 283 Gavin Conibeer 9.1 Introduction 283 9.2
Multiple-Energy-Level Approaches 285 9.2.1 Tandem Cells 285 9.2.2
Multiple-Exciton Generation (MEG) 291 9.2.3 Intermediate-Band Solar Cells
(IBSC) 293 9.3 Modification of the Solar Spectrum 294 9.3.1 Downconversion,
QE > 1 294 9.3.2 Upconversion of Below-Bandgap Photons 297 9.4 Thermal
Approaches 302 9.4.1 Thermophotovoltaics (TPV) 303 9.4.2 Thermophotonics
303 9.4.3 Hot-Carrier Cells 303 9.5 Other Approaches 308 9.5.1
Nonreciprocal Devices 308 9.5.2 Quantum Antennae - Light as a Wave 308 9.6
Conclusions 309 Acknowledgements 309 References 310 Concluding Remarks 315
Gavin Conibeer and Arthur Willoughby Index 319
List of Contributors xiii Series Preface xv Preface xvii Acknowledgements
xix Abbreviations xxi 1 Introduction 1 Gavin Conibeer and Arthur Willoughby
1.1 Introduction 1 1.2 The Sun 1 1.3 Book Outline 3 References 4 2
Fundamental Physical Limits to Photovoltaic Conversion 5 J.F. Guillemoles
2.1 Introduction 5 2.2 Thermodynamic Limits 8 2.2.1 The Sun is the Limit 9
2.2.2 Classical Thermodynamics Analysis of Solar Energy Conversion 10 2.3
Limitations of Classical Devices 12 2.3.1 Detailed Balance and Main
Assumptions 13 2.3.2 p-n Junction 14 2.3.3 The Two-Level System Model 17
2.3.4 Multijunctions 19 2.4 Fundamental Limits of some High-Efficiency
Concepts 23 2.4.1 Beyond Unity Quantum Efficiency 24 2.4.2 Beyond
Isothermal Conversion: Hot-Carrier Solar Cells (HCSC) 29 2.4.3 Beyond the
Single Process/ Photon: Photon Conversion 32 2.5 Conclusion 33 References
33 3 Physical Characterisation of Photovoltaic Materials 37 Daniel Bellet
and Edith Bellet-Amalric 3.1 Introduction 37 3.2 Correspondence between
Photovoltaic Materials Characterisation Needs and Physical Techniques 37
3.3 X-Ray Techniques 38 3.3.1 X-Ray Diffraction (XRD) 39 3.3.2
Grazing-Incidence X-Ray Diffraction (GIXRD) 42 3.3.3 X-Ray Reflectivity
(XRR) 44 3.3.4 Other X-Ray Techniques 46 3.4 Electron Microscopy Methods 47
3.4.1 Electron-Specimen Interactions and Scanning Electron Microscopy (SEM)
50 3.4.2 Electron Backscattering Diffraction (EBSD) 51 3.4.3 Transmission
Electron Microscopy (TEM) 53 3.4.4 Electron Energy Loss Spectroscopy (EELS)
54 3.5 Spectroscopy Methods 55 3.5.1 X-Ray Photoelectron Spectroscopy (XPS)
55 3.5.2 Secondary Ion Mass Spectrometry (SIMS) 57 3.5.3 Rutherford
Backscattering Spectrometry (RBS) 58 3.5.4 Raman Spectroscopy 58 3.5.5
UV-VIS-NIR Spectroscopy 60 3.6 Concluding Remarks and Perspectives 61
Acknowledgements 62 References 62 4 Developments in Crystalline Silicon
Solar Cells 67 Martin A. Green 4.1 Introduction 67 4.2 Present Market
Overview 68 4.3 Silicon Wafers 69 4.3.1 Standard Process 69 4.3.2
Multicrystalline Silicon Ingots 72 4.3.3 Ribbon Silicon 73 4.4 Cell
Processing 75 4.4.1 Screen-Printed Cells 75 4.4.2 Buried-Contact and Laser
Doped, Selective-Emitter Solar Cells 78 4.4.3 HIT Cell 79 4.4.4
Rear-Contact Cell 80 4.4.5 PERL Solar Cell 81 4.5 Conclusion 84
Acknowledgement 84 References 84 5 Amorphous and Microcrystalline Silicon
Solar Cells 87 R.E.I. Schropp 5.1 Introduction 87 5.2 Deposition Methods 89
5.2.1 Modifications of Direct PECVD Techniques 90 5.2.2 Remote PECVD
Techniques 91 5.2.3 Inline HWCVD Deposition 93 5.3 Material Properties 93
5.3.1 Protocrystalline Silicon 94 5.3.2 Microcrystalline or Nanocrystalline
Silicon 95 5.4 Single-Junction Cell 98 5.4.1 Amorphous (Protocrystalline)
Silicon Cells 100 5.4.2 Microcrystalline (c-Si:H) Silicon Cells 101 5.4.3
Higher Deposition Rate 103 5.5 Multijunction Cells 104 5.6 Modules and
Production 105 5.6 Acknowledgments 108 References 108 6 III-V Solar Cells
115 N.J. Ekins-Daukes 6.1 Introduction 115 6.2 Homo- and Heterojunction
III-V Solar Cells 117 6.2.1 GaAs Solar Cells 119 6.2.2 InP Solar Cells 122
6.2.3 InGaAsP 123 6.2.4 GaN 123 6.3 Multijunction Solar Cells 124 6.3.1
Monolithic Multijunction Solar Cells 125 6.3.2 Mechanically Stacked
Multijunction Solar Cells 131 6.4 Applications 133 6.4.1 III-V Space
Photovoltaic Systems 133 6.4.2 III-V Concentrator Photovoltaic Systems 134
6.5 Conclusion 136 References 136 7 Chalcogenide Thin-Film Solar Cells 147
M. Paire, S. Delbos, J. Vidal, N. Naghavi, and J.F. Guillemoles 7.1
Introduction 147 7.2 CIGS 150 7.2.1 Device Fabrication 150 7.2.2 Material
Properties 164 7.2.3 Device Properties 173 7.2.4 Outlook 183 7.3 Kesterites
187 7.3.1 Advantages of CZTS 187 7.3.2 Crystallographic and Optoelectronic
Properties 189 7.3.3 Synthesis Strategies 192 Acknowledgements 198
References 198 8 Printed Organic Solar Cells 217 Claudia Hoth, Andrea
Seemann, Roland Steim, Tayebeh Ameri, Hamed Azimi, and Christoph J. Brabec
8.1 Introduction 217 8.2 Materials and Morphology 218 8.2.1 Organic
Semiconductors 219 8.2.2 Control of Morphology in oBHJ Solar Cells 224
8.2.3 Monitoring Morphology 233 8.2.4 Numerical Simulations of Morphology
235 8.2.5 Alternative Approaches to Control the Morphology 235 8.3
Interfaces in Organic Photovoltaics 237 8.3.1 Origin of Voc 237 8.3.2
Determination of Polarity-Inverted and Noninverted Structure 238 8.3.3
Optical Spacer 239 8.3.4 Protection Layer between the Electrode and the
Polymer 240 8.3.5 Selective Contact 240 8.3.6 Interface Material Review for
OPV Cells 240 8.4 Tandem Technology 243 8.4.1 Theoretical Considerations
243 8.4.2 Review of Experimental Results 248 8.4.3 Design Rules for Donors
in Bulk-Heterojunction Tandem Solar Cells 255 8.5 Electrode Requirements
for Organic Solar Cells 257 8.5.1 Materials for Transparent Electrodes 258
8.5.2 Materials for Nontransparent Electrodes 263 8.6 Production of Organic
Solar Cells 265 8.7 Summary and Outlook 273 References 273 9
Third-Generation Solar Cells 283 Gavin Conibeer 9.1 Introduction 283 9.2
Multiple-Energy-Level Approaches 285 9.2.1 Tandem Cells 285 9.2.2
Multiple-Exciton Generation (MEG) 291 9.2.3 Intermediate-Band Solar Cells
(IBSC) 293 9.3 Modification of the Solar Spectrum 294 9.3.1 Downconversion,
QE > 1 294 9.3.2 Upconversion of Below-Bandgap Photons 297 9.4 Thermal
Approaches 302 9.4.1 Thermophotovoltaics (TPV) 303 9.4.2 Thermophotonics
303 9.4.3 Hot-Carrier Cells 303 9.5 Other Approaches 308 9.5.1
Nonreciprocal Devices 308 9.5.2 Quantum Antennae - Light as a Wave 308 9.6
Conclusions 309 Acknowledgements 309 References 310 Concluding Remarks 315
Gavin Conibeer and Arthur Willoughby Index 319
xix Abbreviations xxi 1 Introduction 1 Gavin Conibeer and Arthur Willoughby
1.1 Introduction 1 1.2 The Sun 1 1.3 Book Outline 3 References 4 2
Fundamental Physical Limits to Photovoltaic Conversion 5 J.F. Guillemoles
2.1 Introduction 5 2.2 Thermodynamic Limits 8 2.2.1 The Sun is the Limit 9
2.2.2 Classical Thermodynamics Analysis of Solar Energy Conversion 10 2.3
Limitations of Classical Devices 12 2.3.1 Detailed Balance and Main
Assumptions 13 2.3.2 p-n Junction 14 2.3.3 The Two-Level System Model 17
2.3.4 Multijunctions 19 2.4 Fundamental Limits of some High-Efficiency
Concepts 23 2.4.1 Beyond Unity Quantum Efficiency 24 2.4.2 Beyond
Isothermal Conversion: Hot-Carrier Solar Cells (HCSC) 29 2.4.3 Beyond the
Single Process/ Photon: Photon Conversion 32 2.5 Conclusion 33 References
33 3 Physical Characterisation of Photovoltaic Materials 37 Daniel Bellet
and Edith Bellet-Amalric 3.1 Introduction 37 3.2 Correspondence between
Photovoltaic Materials Characterisation Needs and Physical Techniques 37
3.3 X-Ray Techniques 38 3.3.1 X-Ray Diffraction (XRD) 39 3.3.2
Grazing-Incidence X-Ray Diffraction (GIXRD) 42 3.3.3 X-Ray Reflectivity
(XRR) 44 3.3.4 Other X-Ray Techniques 46 3.4 Electron Microscopy Methods 47
3.4.1 Electron-Specimen Interactions and Scanning Electron Microscopy (SEM)
50 3.4.2 Electron Backscattering Diffraction (EBSD) 51 3.4.3 Transmission
Electron Microscopy (TEM) 53 3.4.4 Electron Energy Loss Spectroscopy (EELS)
54 3.5 Spectroscopy Methods 55 3.5.1 X-Ray Photoelectron Spectroscopy (XPS)
55 3.5.2 Secondary Ion Mass Spectrometry (SIMS) 57 3.5.3 Rutherford
Backscattering Spectrometry (RBS) 58 3.5.4 Raman Spectroscopy 58 3.5.5
UV-VIS-NIR Spectroscopy 60 3.6 Concluding Remarks and Perspectives 61
Acknowledgements 62 References 62 4 Developments in Crystalline Silicon
Solar Cells 67 Martin A. Green 4.1 Introduction 67 4.2 Present Market
Overview 68 4.3 Silicon Wafers 69 4.3.1 Standard Process 69 4.3.2
Multicrystalline Silicon Ingots 72 4.3.3 Ribbon Silicon 73 4.4 Cell
Processing 75 4.4.1 Screen-Printed Cells 75 4.4.2 Buried-Contact and Laser
Doped, Selective-Emitter Solar Cells 78 4.4.3 HIT Cell 79 4.4.4
Rear-Contact Cell 80 4.4.5 PERL Solar Cell 81 4.5 Conclusion 84
Acknowledgement 84 References 84 5 Amorphous and Microcrystalline Silicon
Solar Cells 87 R.E.I. Schropp 5.1 Introduction 87 5.2 Deposition Methods 89
5.2.1 Modifications of Direct PECVD Techniques 90 5.2.2 Remote PECVD
Techniques 91 5.2.3 Inline HWCVD Deposition 93 5.3 Material Properties 93
5.3.1 Protocrystalline Silicon 94 5.3.2 Microcrystalline or Nanocrystalline
Silicon 95 5.4 Single-Junction Cell 98 5.4.1 Amorphous (Protocrystalline)
Silicon Cells 100 5.4.2 Microcrystalline (c-Si:H) Silicon Cells 101 5.4.3
Higher Deposition Rate 103 5.5 Multijunction Cells 104 5.6 Modules and
Production 105 5.6 Acknowledgments 108 References 108 6 III-V Solar Cells
115 N.J. Ekins-Daukes 6.1 Introduction 115 6.2 Homo- and Heterojunction
III-V Solar Cells 117 6.2.1 GaAs Solar Cells 119 6.2.2 InP Solar Cells 122
6.2.3 InGaAsP 123 6.2.4 GaN 123 6.3 Multijunction Solar Cells 124 6.3.1
Monolithic Multijunction Solar Cells 125 6.3.2 Mechanically Stacked
Multijunction Solar Cells 131 6.4 Applications 133 6.4.1 III-V Space
Photovoltaic Systems 133 6.4.2 III-V Concentrator Photovoltaic Systems 134
6.5 Conclusion 136 References 136 7 Chalcogenide Thin-Film Solar Cells 147
M. Paire, S. Delbos, J. Vidal, N. Naghavi, and J.F. Guillemoles 7.1
Introduction 147 7.2 CIGS 150 7.2.1 Device Fabrication 150 7.2.2 Material
Properties 164 7.2.3 Device Properties 173 7.2.4 Outlook 183 7.3 Kesterites
187 7.3.1 Advantages of CZTS 187 7.3.2 Crystallographic and Optoelectronic
Properties 189 7.3.3 Synthesis Strategies 192 Acknowledgements 198
References 198 8 Printed Organic Solar Cells 217 Claudia Hoth, Andrea
Seemann, Roland Steim, Tayebeh Ameri, Hamed Azimi, and Christoph J. Brabec
8.1 Introduction 217 8.2 Materials and Morphology 218 8.2.1 Organic
Semiconductors 219 8.2.2 Control of Morphology in oBHJ Solar Cells 224
8.2.3 Monitoring Morphology 233 8.2.4 Numerical Simulations of Morphology
235 8.2.5 Alternative Approaches to Control the Morphology 235 8.3
Interfaces in Organic Photovoltaics 237 8.3.1 Origin of Voc 237 8.3.2
Determination of Polarity-Inverted and Noninverted Structure 238 8.3.3
Optical Spacer 239 8.3.4 Protection Layer between the Electrode and the
Polymer 240 8.3.5 Selective Contact 240 8.3.6 Interface Material Review for
OPV Cells 240 8.4 Tandem Technology 243 8.4.1 Theoretical Considerations
243 8.4.2 Review of Experimental Results 248 8.4.3 Design Rules for Donors
in Bulk-Heterojunction Tandem Solar Cells 255 8.5 Electrode Requirements
for Organic Solar Cells 257 8.5.1 Materials for Transparent Electrodes 258
8.5.2 Materials for Nontransparent Electrodes 263 8.6 Production of Organic
Solar Cells 265 8.7 Summary and Outlook 273 References 273 9
Third-Generation Solar Cells 283 Gavin Conibeer 9.1 Introduction 283 9.2
Multiple-Energy-Level Approaches 285 9.2.1 Tandem Cells 285 9.2.2
Multiple-Exciton Generation (MEG) 291 9.2.3 Intermediate-Band Solar Cells
(IBSC) 293 9.3 Modification of the Solar Spectrum 294 9.3.1 Downconversion,
QE > 1 294 9.3.2 Upconversion of Below-Bandgap Photons 297 9.4 Thermal
Approaches 302 9.4.1 Thermophotovoltaics (TPV) 303 9.4.2 Thermophotonics
303 9.4.3 Hot-Carrier Cells 303 9.5 Other Approaches 308 9.5.1
Nonreciprocal Devices 308 9.5.2 Quantum Antennae - Light as a Wave 308 9.6
Conclusions 309 Acknowledgements 309 References 310 Concluding Remarks 315
Gavin Conibeer and Arthur Willoughby Index 319