Journal ArticleDOI
Reciprocity between electroluminescence and quantum efficiency used for the characterization of silicon solar cells
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TLDR
In this article, the path length enhancement factor of textured and untextured crystalline silicon solar cells is derived from the electroluminescence spectrum, which is interpreted in terms of two electro-optical reciprocity relations.Abstract:
Spectrally and spatially resolved electroluminescence emission of crystalline silicon solar cells is interpreted in terms of two electro-optical reciprocity relations. The first relation links the photovoltaic quantum efficiency to the electroluminescence spectrum. Both methods contain information on recombination and the optical pathlength of the incident light, simultaneously. From the electroluminescence spectrum, we derive the pathlength enhancement factor of textured and untextured crystalline silicon solar cells. Further, we use local quantum efficiency measurements to quantitatively explain light induced current as well as panchromatic electroluminescence images. A second reciprocity relation connects open circuit voltage of a solar cell with the light emitting diode quantum efficiency of the same device. For a given quality of light trapping and a given open circuit voltage, we predict the attainable LED quantum efficiency and verify our results experimentally. Copyright © 2009 John Wiley & Sons, Ltd.read more
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Efficient luminescent solar cells based on tailored mixed-cation perovskites
Dongqin Bi,Wolfgang Tress,M. Ibrahim Dar,Peng Gao,Jingshan Luo,Clementine Renevier,Kurt Schenk,Antonio Abate,Fabrizio Giordano,Juan-Pablo Correa Baena,Jean-David Decoppet,Shaik M. Zakeeruddin,Mohammad Khaja Nazeeruddin,Michael Grätzel,Anders Hagfeldt +14 more
TL;DR: A new metal halide perovskite photovoltaic cell that exhibits both very high solar-to-electric power-conversion efficiency and intense electroluminescence is reported on.
Journal ArticleDOI
Characterization of nanostructured hybrid and organic solar cells by impedance spectroscopy
TL;DR: The interpretation of the impedance parameters for determining the internal features of the device, concerning the carrier distribution, materials properties such as the density of states and/or doping of the semiconductors, and the match of energy levels for photoinduced charge generation and separation are emphasized.
Journal ArticleDOI
Towards stable and commercially available perovskite solar cells
TL;DR: Park et al. as discussed by the authors proposed a reproducible manufacturing method for perovskite solar cells, as well as routes to manage grain boundaries and interfacial charge transport to achieve long-term stability.
Journal ArticleDOI
Quantifying Losses in Open-Circuit Voltage in Solution-Processable Solar Cells
Jizhong Yao,Thomas Kirchartz,Thomas Kirchartz,Michelle S. Vezie,Mark A. Faist,Wei Gong,Wei Gong,Zhicai He,Hongbin Wu,Joel Troughton,Trystan Watson,Daniel Bryant,Jenny Nelson +12 more
TL;DR: The reciprocity relation between light absorption and emission is used to explore theoretical and practical performance limits for emerging technologies based on organics and perovskites, and compare them to state-of-the-art systems based on GaAs, c-Si, and CIGS.
Journal ArticleDOI
Radiative efficiency of state‐of‐the‐art photovoltaic cells
TL;DR: In this article, the maximum possible photovoltaic performance is reached when solar cells are 100% radiatively efficient, with different PV technologies at different stages in their evolution towards this ideal.
References
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TL;DR: In this paper, a statistical approach is taken toward the ray optics of optical media with complicated nonspherical and nonplanar surface shapes, where the light in such a medium will tend to be randomized in direction and of 2n2(x) times greater intensity than the externally incident light, where n(x), is the local index of refraction.
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Reciprocity relation between photovoltaic quantum efficiency and electroluminescent emission of solar cells
TL;DR: In this article, the spectral and angular dependences of the electroluminescence of solar cells and light emitting diodes were analyzed and a rigorous proof for a reciprocity theorem was given.
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Limiting efficiency of silicon solar cells
TL;DR: The detailed balance method for calculating the radiative recombination limit to the performance of solar cells has been extended to include free carrier absorption and Auger recombination in addition to radiative losses.
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Photoluminescence imaging of silicon wafers
TL;DR: In this paper, the spatial variation of the effective minority carrier lifetime is measured without being affected by minority carrier trapping or by excess carriers in space charge regions, effects that lead to experimental artifacts in other techniques.
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Efficient silicon light-emitting diodes
TL;DR: A large increase in silicon light-emitting diode power conversion efficiency is reported to values above 1% near room temperature—close to the values of representative direct bandgap emitters of a little more than a decade ago.