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arXiv 1608.02150cond-mat.mtrl-sci
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大电流、高效率梯度带隙钙钛矿太阳能电池

High current, high efficiency graded band gap perovskite solar cells

Onur Ergen, S. Matt Gilbert, Thang Pham, Sally J. Turner, Mark Tian Zhi Tan, Marcus A. Worsley, Alex Zettl

摘要:

有机-无机卤化物钙钛矿材料已经成为传统太阳能电池构建块的有吸引力的替代品。它们的高光吸收系数和长漫射长度表明高功率转换效率(PCE),1 -5并且实际上基于钙钛矿的单带隙和串联太阳能电池设计已经产生了令人印象深刻的性能。1 -16进一步提高太阳光谱利用率的一种方法是渐变带隙,但是这在以前对于钙钛矿还没有实现。在这项研究中,我们展示了梯度带隙钙钛矿太阳能电池,其稳态转换效率平均为18.4%,最高为21.7%,全部没有反射涂层。实验数据的分析产生高填充因子~75%和高短路电流密度高达42.1 mA/cm 2。这些电池基于两个钙钛矿层(MASnI 3和MAPbI 3-xBrx)的新型架构,结合GAN、单层六方氮化硼和石墨烯气凝胶,显示出钙钛矿太阳能电池有史以来报道的最高效率。

英文摘要:

Organic-inorganic halide perovskite materials have emerged as attractive alternatives to conventional solar cell building blocks. Their high light absorption coefficients and long diffusion lengths suggest high power conversion efficiencies (PCE),1-5 and indeed perovskite-based single band gap and tandem solar cell designs have yielded impressive performances.1-16 One approach to further enhance solar spectrum utilization is the graded band gap, but this has not been previously achieved for perovskites. In this study, we demonstrate graded band gap perovskite solar cells with steady-state conversion efficiencies averaging 18.4%, with a best of 21.7%, all without reflective coatings. An analysis of the experimental data yields high fill factors of ~75% and high short circuit current densities up to 42.1 mA/cm2. These cells, which are based on a novel architecture of two perovskite layers (MASnI3 and MAPbI3-xBrx), incorporating GaN, monolayer hexagonal boron nitride, and graphene aerogel, display the highest efficiency ever reported for perovskite 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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