| Preface | p. v |
| List of Contributors | p. xv |
| Milestones of Solar Conversion and Photovoltaics | p. 1 |
| Prehistory | p. 1 |
| Milestones of Photovoltaics | p. 1 |
| From Extraterrestrial to Terrestrial Applications | p. 7 |
| Introduction | p. 7 |
| Solar Cells for Space | p. 8 |
| Closer to the Limit | p. 10 |
| Material Quality | p. 11 |
| Back Surface Reflector (BSR) | p. 12 |
| Back Surface Field (BSF) | p. 12 |
| The Violet Cell [10] | p. 13 |
| Textured Surfaces | p. 13 |
| Contacts | p. 14 |
| Bypass Function [13] | p. 14 |
| Surface Passivation | p. 14 |
| Low-Intensity, Low-Temperature Operation | p. 14 |
| Solar Cell Assembly | p. 15 |
| High Efficiency Solar Cells | p. 15 |
| Cost Reduction Measures | p. 21 |
| Silicon Production | p. 21 |
| Bulk Material | p. 21 |
| Cell Contacts | p. 21 |
| Encapsulation | p. 22 |
| Concentrating Systems - A New Opportunity for High Efficiency Space Solar Cells | p. 22 |
| References | p. 25 |
| PV Solar Electricity: From a Niche Market to One of the Most Important Mainstream Markets for Electricity | p. 29 |
| General Overview | p. 29 |
| PV Solar Electricity Market History | p. 31 |
| Price and Competitiveness of PV Solar Electricity | p. 33 |
| Future Market Development | p. 38 |
| Technology Evolution | p. 39 |
| References | p. 43 |
| Advanced Solar-Grade Si Material | p. 45 |
| Introduction | p. 45 |
| Production Pathways for Solar Silicon Feedstock | p. 45 |
| Metallurgical Grade Silicon: Carbothermic Reduction of Silica as a Starting Point for Most Pathways | p. 45 |
| Established Production Methods: Purification of Metallurgical Silicon via the "Silane Route" is Dominating | p. 46 |
| Differences in Using TCS or Silane as Feedstock | p. 47 |
| Accommodation of the Processes to the PV Requirements | p. 50 |
| The Myths of the "High-Energy/High-Cost" Rating of Established Silane-Based Polysilicon Deposition Technologies | p. 52 |
| Alternative Technologies for the Production of Solar-Grade Feedstock: Purification of Metallurgical Silicon via Melt Treatment/Crystallization is Dominating | p. 53 |
| Alternative Vapor-Phase Deposition Technologies? | p. 53 |
| Time to Market | p. 53 |
| Summary | p. 53 |
| References | p. 54 |
| EFG Ribbon Technology | p. 55 |
| Introduction | p. 55 |
| EFG process | p. 55 |
| A Novel High-Efficiency Rear-Contact Solar Cell with Bifacial Sensitivity | p. 65 |
| Introduction | p. 65 |
| Structure of the Bifacial Rear-Contact Solar Cell | p. 67 |
| High-Efficiency and Low-Cost Production Features | p. 68 |
| Inherent Passivation of the Base Contacts | p. 69 |
| Processing Sequence | p. 70 |
| Production Technology | p. 71 |
| Back-Surface Grooving | p. 71 |
| Metallization by Oblique Evaporation | p. 72 |
| Surface Passivation by PECVD Silicon Nitride | p. 75 |
| Interconnection Technology Based on Conductive Adhesives | p. 80 |
| Cell Results | p. 81 |
| Efficiency Perspectives | p. 82 |
| Silicon Substrate Options | p. 84 |
| Application of Bifacial Solar Cells | p. 86 |
| General Applications of Bifacial Flat Panels | p. 86 |
| Integration of Bifacial PV Modules in Low-Cost Concentrating Systems | p. 87 |
| Multifunctional Bifacial PV Elements | p. 88 |
| Conclusions | p. 90 |
| References | p. 91 |
| Commercial High-Efficiency Silicon Solar Cells | p. 95 |
| Introduction | p. 95 |
| The Point-Contact Solar Cell | p. 95 |
| The HIT Solar Cell | p. 97 |
| The Buried-Contact Solar Cell | p. 98 |
| References | p. 99 |
| III-V Solar Cells and Concentrator Arrays | p. 101 |
| Introduction: Early History of Heterostructures and III-V Solar Cells | p. 101 |
| Single-Junction AlGaAs/GaAs Concentrator Solar Cells | p. 105 |
| Multijunction Solar Cells | p. 109 |
| GaInP/GaAs Dual-Junction Solar Cells | p. 10 |
| Hybrid Triple-Junction GaInP/GaAs-GaSb Monolithic/Mechanically Stacked Solar Cells | p. 114 |
| Monolithic GaInP/Ga(In)As/Ge Triple-Junction Solar Cells | p. 116 |
| Concentrator PV Modules and Installations with III-V Solar Cells | p. 120 |
| Concentrator Modules with Mini-lens Panels: Design and Fabrication | p. 124 |
| Outdoor Measurements of the Test Modules with Mini-lens Panels | p. 127 |
| Perspectives of the Efficiency Increase in III-V Solar Cells | p. 128 |
| Conclusion | p. 132 |
| References | p. 133 |
| The Economic Perspective: Is Concentrator PV Capable of Breaking the Economic Barrier | p. 143 |
| Climate Change and Depletion of Fossil fuels | p. 143 |
| Photovoltaic as Part of Global Energy Trends | p. 143 |
| Growth Perspective of Photovoltaic | p. 144 |
| Cost Reduction as the Major Target | p. 147 |
| Cost Potentials of the Current Technologies | p. 147 |
| Thin-Film PV in Comparison to Crystalline Silicon PV: Advantages in Price, Performance and Large Size | p. 148 |
| CPV in Comparison to Crystalline Silicon Flat-Plate PV | p. 149 |
| Conclusion: Cost Potential to Reach "Grid Parity" | p. 149 |
| Meeting the Tremendous Growth Perspective | p. 151 |
| Growth Beyond all Imagination | p. 151 |
| Multi-GWp Capability | p. 151 |
| The Market in 2030: Will There Be a Winning Technology? | p. 153 |
| Cost Barriers for Leaving the Niche | p. 153 |
| Explosive Growth of PV - Low Rate of Innovation | p. 153 |
| High Growth at High Price Levels - the Problem of a Subsidized Industry | p. 154 |
| Solar Energy: Abundant Quantity but Low Density | p. 155 |
| The Learning Curve of CPV: Quick or Slow | p. 155 |
| Concentration on the Strength Factors | p. 155 |
| Learning from the LED and Photonic Industries | p. 155 |
| Solar*Tec AG's Approach to CPV | p. 156 |
| References | p. 158 |
| Fluorescent Solar Energy Concentrators: Principle and Present State of Development | p. 159 |
| Principle | p. 159 |
| Concentrator Stacks | p. 161 |
| Light Guiding by Photonic Band Pass Mirrors | p. 163 |
| Factors Determining Energy Efficiency of Fluorescent Concentrators | p. 164 |
| Theoretical Limits of Concentration and Efficiency | p. 166 |
| Limit of Concentration | p. 166 |
| Limit of Efficiency | p. 167 |
| Improvements of Basic Design | p. 168 |
| Optical Concentrators at the Collector Output | p. 168 |
| Combination of Fluorescent Collector with Large Area Si-Solar Cell | p. 168 |
| Combination of Fluorescent Concentrator with Up-Conversion | p. 169 |
| Combination of Collector Stack with Band Pass Mirror | p. 171 |
| Experimental Results | p. 172 |
| Results of the Initial Period | p. 172 |
| Recent Experimental and Theoretical Work | p. 173 |
| References | p. 175 |
| Hybrid Photovoltaic/Thermal Collector Based on a Luminescent Concentrator | p. 177 |
| Introduction | p. 177 |
| PV/T Hybrid Collector Based on a Luminescent Concentrator | p. 178 |
| Conclusions | p. 181 |
| References | p. 181 |
| Installation Concept and Future Applications | p. 183 |
| PV from the Customer Perspective | p. 183 |
| PV Deployment Today | p. 186 |
| Nondomestic Standalone Systems | p. 186 |
| Domestic Standalone Systems | p. 187 |
| Grid-Connected Central PV Systems | p. 188 |
| Grid-Connected Decentral Systems | p. 189 |
| PV Developments in the Future | p. 193 |
| Design Rules for Efficient Organic Solar Cells | p. 195 |
| Introduction | p. 195 |
| Material Design Rules for Donors in Single-Junction Solar Cells | p. 196 |
| Toward Novel Polymeric Donors: Poly-Cyclic-Bridged-DiThieno Copolymers (PCPDT) | p. 200 |
| Structural and Optical Properties of PCPDT | p. 201 |
| Transport and Electrical Properties of PCPDT-BT | p. 203 |
| Photovoltaic Performance of PCPDT-Based Solar Cells | p. 209 |
| From Single-Junction to Multijunction Solar Cells | p. 215 |
| Summary | p. 219 |
| References | p. 220 |
| Index | p. 223 |
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