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arXiv 2604.05855cond-mat.mtrl-sci
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低带隙(Ag,Cu)(In,Ga)Se2太阳能电池在叠层应用中的损耗分析

Loss analysis of Low Bandgap (Ag,Cu)(In,Ga)Se2 Solar Cells for Tandem Applications

University of Luxembourg(卢森堡大学);Empa – Swiss Federal Laboratories for Materials Science and Technology(瑞士联邦材料科学与技术研究院)

Francesco Lodola, Sevan Gharabeiki, Maximilian Krause, Shiro Nishiwaki, Romain Carron, Susanne Siebentritt

AI总结:

研究分析了1.0 eV带隙(Ag,Cu)(In,Ga)Se2太阳能电池的损耗,发现电流损耗主要来自吸收层,电压损耗源于非辐射复合,填充因子损耗源于高二极管因子。

摘要:

叠层太阳能电池能更有效地利用太阳光谱能量。黄铜矿太阳能电池因其1.0 eV带隙的高效率而受到关注,适合作为底层电池。为提高效率,我们对1.0 eV带隙(Ag,Cu)(In,Ga)Se2电池进行了全面的损耗分析,其效率约为18.5%。我们对吸收层和成品电池进行了绝对光电发光、电发光、电流-电压和外部量子效率测量,分析了短路电流、开路电压和填充因子的损耗。电流损耗主要来自吸收层的吸收损耗,只能通过光管理结构来缓解。但电压损耗主要源于吸收层的非辐射复合,填充因子损耗源于高二极管因子。电池的二极管因子显著高于吸收层单独的情况,表明空间电荷区的复合对性能有显著影响。

英文摘要:

Tandem solar cells can better harness the energy of the solar spectrum. Chalcopyrite solar cells have drawn attention, being the only highly efficient devices with bandgap around 1.0 eV, suitable for bottom cells. In the quest for better efficiencies, we conduct a complete loss analysis of 1.0 eV bandgap (Ag,Cu)(In,Ga)Se2 cells with efficiencies around 18.5%. We perform absolute photoluminescence, electroluminescence, JV and EQE measurements on the absorber and the finished cells to analyze losses of short-circuit current, open-circuit voltage and fill factor. The relevant losses in current are due to absorption losses in the absorber and could only be mitigated by light management structures. But the most significant losses are found in the voltage, due to non-radiative recombination in the absorber, and the fill factor, due to a high diode factor. The diode factor of the cells is significantly higher than in the absorber alone, indicating a strong influence of recombination in the space charge region.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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