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arXiv 1604.04491cond-mat.mtrl-sci
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基于外量子效率分析的薄膜光伏器件光损耗和复合损耗的定量测定

Quantitative determination of optical and recombination losses in thin-film photovoltaic devices based on external quantum efficiency analysis

Akihiro Nakane, Hitoshi Tampo, Masato Tamakoshi, Shohei Fujimoto, Kang Min Kim, Shinho Kim, Hajime Shibata, Shigeru Niki, Hiroyuki Fujiwara

摘要:

在开发具有高效率的光伏器件时,载流子损耗的定量测定是至关重要的。然而,在传统的太阳能电池表征技术中,不能容易地评估源自光吸收器内的寄生光吸收和载流子复合的光电流减少。在这里,我们开发了一个通用的分析方案,在亚微米织构太阳能电池的光学和复合损耗进行了系统的评估,从外部量子效率(EQE)光谱。在该方法中,首先通过在吸收光谱计算中引入抗反射条件来推导太阳能电池中的光吸收,然后通过考虑从吸收层界面开始的载流子收集长度来模拟从光吸收层中的载流子提取。我们的分析方法适用于各种各样的光伏器件,包括锌黄锡矿太阳能电池[Cu2ZnSnSe4,Cu2ZnSnS4和Cu2ZnSn(S,Se)4],锌碲镉太阳能电池,和混合钙钛矿(CH3NH3PbI3)太阳能电池,并提供了良好的拟合许多EQE光谱之前报道。基于我们的EQE分析结果,我们讨论了寄生吸收和载流子复合在不同类型的太阳能电池的影响。

英文摘要:

In developing photovoltaic devices with high efficiencies, quantitative determination of the carrier loss is crucial. In conventional solar-cell characterization techniques, however, photocurrent reduction originating from parasitic light absorption and carrier recombination within the light absorber cannot be assessed easily. Here, we develop a general analysis scheme in which the optical and recombination losses in submicron-textured solar cells are evaluated systematically from external quantum efficiency (EQE) spectra. In this method, the optical absorption in solar cells is first deduced by imposing the anti-reflection condition in the calculation of the absorptance spectrum, and the carrier extraction from the light absorber layer is then modeled by considering a carrier collection length from the absorber interface. Our analysis method is appropriate for a wide variety of photovoltaic devices, including kesterite solar cells [Cu2ZnSnSe4, Cu2ZnSnS4, and Cu2ZnSn(S,Se)4], zincblende CdTe solar cells, and hybrid perovskite (CH3NH3PbI3) solar cells, and provides excellent fitting to numerous EQE spectra reported earlier. Based on the results obtained from our EQE analyses, we discuss the effects of parasitic absorption and carrier recombination in different types of solar cells.

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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