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基于共聚物模板 TiO2 电子传输层的自修复钙钛矿太阳能电池。

Self-healing perovskite solar cells based on copolymer-templated TiO electron transport layer.

机构信息

Department of Chemistry, Catalysis Division, University of Isfahan, Isfahan, 81746-73441, Iran.

CAS Key Laboratory of Design and Assembly of Functional Nanostructures, and Fujian Provincial Key Laboratory of Nanomaterials, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, Fujian, People's Republic of China.

出版信息

Sci Rep. 2023 Apr 19;13(1):6368. doi: 10.1038/s41598-023-33473-9.

DOI:10.1038/s41598-023-33473-9
PMID:37076530
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10115803/
Abstract

Inorganic hole-transport materials (HTMs) such as copper indium disulfide (CIS) have been applied in perovskite solar cells (PSCs) to improve the poor stability of the conventional Spiro-based PSCs. However, CIS-PSCs' main drawback is their lower efficiency than Spiro-PSCs. In this work, copolymer-templated TiO (CT-TiO) structures have been used as an electron transfer layer (ETL) to improve the photocurrent density and efficiency of CIS-PSCs. Compared to the conventional random porous TiO ETLs, copolymer-templated TiO ETLs with a lower refractive index improve the transmittance of input light into the cell and therefore enhance the photovoltaic performance. Interestingly, a large number of surface hydroxyl groups on the CT-TiO induce a self-healing effect in perovskite. Thus, they provide superior stability in CIS-PSC. The fabricated CIS-PSC presents a conversion efficiency of 11.08% (Jsc = 23.35 mA/cm, Voc = 0.995, and FF = 0.477) with a device area of 0.09 cm under 100 mW/cm. Moreover, these unsealed CIS-PSCs retained 100% of their performance after aging tests for 90 days under ambient conditions and even increased from 11.08 to 11.27 over time due to self-healing properties.

摘要

无机空穴传输材料（HTMs）如铜铟二硫（CIS）已被应用于钙钛矿太阳能电池（PSCs）中，以提高传统基于Spiro 的 PSCs 的较差稳定性。然而，CIS-PSCs 的主要缺点是其效率低于 Spiro-PSCs。在这项工作中，共聚物模板化 TiO（CT-TiO）结构已被用作电子传输层（ETL），以提高 CIS-PSCs 的光电流密度和效率。与传统的随机多孔 TiO ETL 相比，具有较低折射率的共聚物模板化 TiO ETL 提高了输入光进入电池的透光率，从而增强了光伏性能。有趣的是，CT-TiO 上大量的表面羟基基团在钙钛矿中诱导了自修复效应。因此，它们在 CIS-PSC 中提供了卓越的稳定性。所制备的 CIS-PSC 在 100mW/cm 下具有 11.08%的转换效率（Jsc=23.35mA/cm，Voc=0.995，FF=0.477），器件面积为 0.09cm。此外，这些未密封的 CIS-PSCs 在环境条件下老化测试 90 天后保留了 100%的性能，甚至由于自修复特性，其性能从 11.08%增加到 11.27%。

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