A Universal Surface Fixed Charge Reconstruction Strategy to Minimize Contact Loss of Wide Bandgap Perovskite Photovoltaics

IF 32.4 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Energy & Environmental Science Pub Date : 2025-04-11 DOI:10.1039/d4ee05855k

Yaxiong Guo, Fang Yao, Yunchen Zhang, Guoyi Chen, Shengjie Du, Zhixi Yu, Hai Zhou, Weijun Ke, Chun Li, Guojia Fang

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引用次数: 0

Abstract

It is widely accepted that non-radiative recombination losses in the wide-bandgap (WBG) subcell dominate carrier recombination processes in perovskite tandem photovoltaics. We demonstrate that healing the perovskite top-surface with an additive potassium thioglycolate (PT) inhibits Pb-Pb dimer formation at the top surface, which is especially urgent in ultra-WBG perovskite CsxFA1-xPb(I1-yBry)3 (y>0.6). Concurrently, field effect passivation, induced by the ordered arrangement of linear diamine 1,3-diammonium (PDA2+) and associated adequate surface fixed charge, are reconstituted. This “healing-reconstruction” strategy suppresses cross-interface recombination and boosts open circuit voltage (VOC), delivering the highest VOC value reported to date for 1.91 eV perovskite. The strategy allows us to approach the potential of VOC (VOC losses<10% of the SQ limit) in single-junction applications employing band gaps in the range from 1.6 to 1.9 eV, that is critical for tandem solar cells.

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一种减少宽禁带钙钛矿光伏电池接触损耗的通用表面固定电荷重建策略

人们普遍认为，在钙钛矿串联光伏中，宽带隙（WBG）亚电池中的非辐射复合损失主导着载流子复合过程。我们证明，用添加剂硫代糖酸钾（PT）修复钙钛矿顶表面可以抑制顶表面Pb-Pb二聚体的形成，这在超wbg钙钛矿CsxFA1-xPb(I1-yBry)3 （y>0.6）中尤为迫切。同时，重构了由线性二胺1,3-二铵（PDA2+）有序排列和相应的表面固定电荷引起的场效应钝化。这种“修复重建”策略抑制了交叉界面重组，提高了开路电压（VOC），为1.91 eV的钙钛矿提供了迄今为止报道的最高VOC值。该策略使我们能够在使用1.6至1.9 eV的带隙范围内的单结应用中接近VOC的潜力（VOC损失为SQ极限的10%），这对串联太阳能电池至关重要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

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).