Carboxymethyldextran Sodium Modified SnO2 Enables High Efficient and Stable Perovskite Solar Cells with high fill factor of 84.89 %

IF 12.7 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

ACS Central Science Pub Date : 2024-11-06 DOI:10.1039/d4ta05551a

Qi Luo, Bowen Li, Chenyu Ju, Hongxin Weng, Hong Zhang, Qihao Dai, Pengfei Liu, Hao Xiong, Kunyuan Zheng, Xiang Peng, Xinyu Tan

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引用次数: 0

Abstract

SnO2-based perovskite solar cells (PSCs) have made tremendous progress, but there's still a lot of room for optimization of the fill factor and power conversion efficiency compared with the short-circuit current density and open-circuit voltage. The fill factor is strongly related with carrier extraction and transport efficiency. In this study, a simple method for passivating the SnO2 by integrating Carboxymethyldextran Sodium (CMD) into the SnO2 colloidal mixture was presented. It is shown that the addition of CMD can improve the electronic property of SnO2, reduce the nonradiative recombination, effectively passivate the defects at the buried interface of SnO2 and perovskite, and make the device form a suitable energy level arrangement. As a result, the efficiency of this SnO2-CMD-based device is increased from 23.09 % to 24.73 %, the fill factor (FF) is significantly increased to 84.89 %, with negligible hysteresis. At a relative humidity of 20 %-30 % and a temperature of 25 °C, the device retains 86 % of its original photovoltaic conversion efficiency (PCE) after 1000 hours of storage. This study provides a low-cost, convenient and efficient method for realizing efficient and stable PSCs.

查看原文本刊更多论文

羧甲基二葡聚糖钠改性二氧化硒实现高效稳定的 Perovskite 太阳能电池，填充因子高达 84.89

基于二氧化锡的过氧化物太阳能电池（PSCs）已经取得了巨大进步，但与短路电流密度和开路电压相比，填充因子和功率转换效率仍有很大的优化空间。填充因子与载流子萃取和传输效率密切相关。本研究提出了一种通过在二氧化锡胶体混合物中加入羧甲基二葡聚糖钠（CMD）来钝化二氧化锡的简单方法。结果表明，CMD 的加入可以改善二氧化锡的电子特性，减少非辐射重组，有效钝化二氧化锡和过氧化物埋藏界面的缺陷，并使器件形成合适的能级排列。因此，这种基于 SnO2-CMD 的器件的效率从 23.09% 提高到 24.73%，填充因子 (FF) 显著提高到 84.89%，滞后几乎可以忽略不计。在相对湿度为 20 %-30 %、温度为 25 °C 的条件下，该装置在存储 1000 小时后仍能保持 86 % 的原始光电转换效率 (PCE)。这项研究为实现高效、稳定的 PSC 提供了一种低成本、便捷、高效的方法。

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

ACS Central Science Chemical Engineering-General Chemical Engineering

CiteScore

25.50

自引率

0.50%

发文量

194

审稿时长

10 weeks

期刊介绍： ACS Central Science publishes significant primary reports on research in chemistry and allied fields where chemical approaches are pivotal. As the first fully open-access journal by the American Chemical Society, it covers compelling and important contributions to the broad chemistry and scientific community. "Central science," a term popularized nearly 40 years ago, emphasizes chemistry's central role in connecting physical and life sciences, and fundamental sciences with applied disciplines like medicine and engineering. The journal focuses on exceptional quality articles, addressing advances in fundamental chemistry and interdisciplinary research.