华中科技大学陈炜团队报道了倒置钙钛矿太阳能电池的埋藏界面分子杂化。相关研究成果于2024年6月26日发表于国际顶尖学术期刊《自然》。

与“正常”器件结构相比，具有“倒置”结构的钙钛矿太阳能电池（PSCs）具有更好的功率转换效率（PCEs）和运行稳定性，是这一新兴光伏技术商业化的关键途径。具体而言，由于改进的自组装分子（SAMs）和钝化策略的发展，倒置PSCs的PCEs已经超过25%。然而，SAMs的润湿性差和团聚将导致界面损失，阻碍PCE和稳定性的进一步提高。

该文中，研究人员报道了倒置PSCs中埋界面的分子杂化，通过将4,4’,4’’-次氮基苯甲酸（NA）的多羧酸官能化芳香族化合物与[4-（3，6-二甲基-乙基-9H-咔唑-9-基）丁基]膦酸（Me-4PACz）的流行SAMs共组装来改善异质结界面。Me-4PACz与NA的分子杂化可以显著改善界面特性。由此产生的倒置PSCs证明了26.54%的记录认证稳态效率。

至关重要的是，这一战略与大规模制造无缝衔接，实现了最高认证的倒置迷你模块PCE，达到22.74%（孔径面积：11.1 cm²）。该设备在环境空气中进行了超过2400小时的一个标准阳光运行后，也保持了96.1%的初始PCE。

附：英文原文

Title: Buried interface molecular hybrid for inverted perovskite solar cells

Author: Liu, Sanwan, Li, Jingbai, Xiao, Wenshan, Chen, Rui, Sun, Zhenxing, Zhang, Yong, Lei, Xia, Hu, Shuaifeng, Kober-Czerny, Manuel, Wang, Jianan, Ren, Fumeng, Zhou, Qisen, Raza, Hasan, Gao, You, Ji, Yitong, Li, Sibo, Li, Huan, Qiu, Longbin, Huang, Wenchao, Zhao, Yan, Xu, Baomin, Liu, Zonghao, Snaith, Henry J., Park, Nam-Gyu, Chen, Wei

Issue&Volume: 2024-06-26

Abstract: Perovskite solar cells (PSCs) with an “inverted” architecture are a key pathway for commercializing this emerging photovoltaic technology due to the better power conversion efficiency (PCE) and operational stability as compared to the “normal” device structure. Specifically, PCEs of the inverted PSCs have exceeded 25% owing to the development of improved self-assembled molecules (SAMs)1-5 and passivation strategies6-8. Nevertheless, poor wettability and agglomerations of SAMs9-12 will cause interfacial losses, impeding further improvement in PCE and stability. Herein, we report on molecular hybrid at the buried interface in inverted PSCs by co-assembling a multiple carboxylic acid functionalized aromatic compound of 4,4’,4’’-nitrilotribenzoicacid (NA) with a popular SAM of [4-(3,6-dime-thyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) to improve the heterojunction interface. The molecular hybrid of Me-4PACz with NA could substantially improve the interfacial characteristics. The resulting inverted PSCs demonstrated a record-certified steady-state efficiency of 26.54%. Crucially, this strategy aligns seamlessly with large-scale manufacturing, achieving the highest certified PCE for inverted mini-modules at 22.74% (aperture area: 11.1 cm2). Our device also maintained 96.1% of its initial PCE after more than 2,400hours of 1-sun operation in ambient air.

DOI: 10.1038/s41586-024-07723-3

Source: https://www.nature.com/articles/s41586-024-07723-3