卤化物钙钛矿光伏两步法中相均匀性介导的载流子平衡

IF 32.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Duo Qu, Chuanzhen Shang, Xiaoyu Yang, Chenyun Wang, Bin Zhou, Qichao Qin, Lei Gao, Jingyuan Qiao, Qiang Guo, Wenqiang Yang, Kai Wang, Rui Zhu, Yongguang Tu and Wei Huang
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引用次数: 0

摘要

卤化物钙钛矿的多尺度化学相非均质性严重影响了半导体的物理功能完整性和光伏器件的性能。然而,两步法钙钛矿(tsp)的相均匀性研究很少。在这里,我们详细阐述了fama基TSP薄膜的严重非均质性,发现残余的PbI2晶体和Pb0物质积聚在顶部,而富Cl/ ma界面存在于底部,阻碍了载流子在垂直方向上的非平衡传输。采用4-甲氧基苯基氯化铵进行化学裁剪,增强了TSP膜的均匀性,从而获得了优异的结构稳定性和载流子平衡动态过程。目标TSP p-i-n器件在1个太阳照射下实现了25.12%的记录功率转换效率(认证为24.01%)。该研究揭示了TSP薄膜隐藏的物理化学性质,指导了对微观均匀性和功能完整性的理解以及高效两步法倒钙钛矿太阳能电池的设计。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Phase homogeneity mediated charge-carrier balance in two-step-method halide perovskite photovoltaics†

Phase homogeneity mediated charge-carrier balance in two-step-method halide perovskite photovoltaics†

Phase homogeneity mediated charge-carrier balance in two-step-method halide perovskite photovoltaics†

The multi-scale chemical phase heterogeneity of halide perovskites seriously affects the physical functional integrity of semiconductors and the performance of photovoltaic devices. However, the phase homogeneity in two-step-method perovskites (TSPs) has rarely been investigated. Here, we elaborate on the severe heterogeneity of the FAMA-based TSP film and found that residual PbI2 crystallites and Pb0 species accumulate at the top while a Cl/MA-rich interface is present at the bottom, impeding carrier nonequilibrium transport in the vertical direction. The homogeneity of the TSP film is reinforced by chemical tailoring with 4-methoxyphenethyl ammonium chloride, thus achieving superior structural stability and a charge carrier balance dynamic process. The target TSP p–i–n device achieves a recorded power conversion efficiency of 25.12% under 1-sun illumination (certified at 24.01%). This study uncovers the hidden physicochemical properties of the TSP film, guiding the understanding of microscopic homogeneity and functional integrity and the design of efficient two-step-method inverted perovskite solar cells.

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来源期刊
Energy & Environmental Science
Energy & Environmental Science 化学-工程:化工
CiteScore
50.50
自引率
2.20%
发文量
349
审稿时长
2.2 months
期刊介绍: Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences." Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).
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