Stable and uniform self-assembled organic diradical molecules for perovskite photovoltaics

IF 45.8 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2025-06-26 DOI:10.1126/science.adv4551

Wenping Wu, Han Gao, Lingbo Jia, Yuan Li, Dezhong Zhang, Hongmei Zhan, Jianan Xu, Binhe Li, Ziran Geng, Yanxiang Cheng, Hui Tong, Yanxiong Pan, Jun Liu, Yongcai He, Xixiang Xu, Zhenguo Li, Bo He, Min Zhou, Lixiang Wang, Chuanjiang Qin

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Abstract

Organic self-assembled molecules (SAMs), which are widely used in perovskite solar cells (PSCs), should exhibit enhanced performance to support the ongoing advancement of perovskite photovoltaics. We designed diradical SAMs through a coplanar conjugation of a donor-acceptor strategy to facilitate hole transport across the SAMs. The diradical SAMs exhibited high photothermal and electrochemical stability as well as improved assembly uniformity and large-area solution processability attributed to molecular steric hindrance design. We used an advanced scanning electrochemical cell microscopy–thin-layer cyclic voltammetry technique to accurately determine the carrier transfer rate, stability, and assembly properties of the SAMs. Ultimately, the efficiencies of the PSCs exceeded 26.3%, minimodules (10.05 cm²) reached 23.6%, and perovskite-silicon tandem devices (1 cm²) surpassed 34.2%. The PSCs maintained >97% after 2000 hours tracking at 45°C.

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钙钛矿光伏电池中稳定、均匀的自组装有机双自由基分子

广泛应用于钙钛矿太阳能电池（PSCs）的有机自组装分子（sam）应该表现出更强的性能，以支持钙钛矿光伏发电的持续发展。我们通过供体-受体共面共轭策略设计了双自由基SAMs，以促进空穴在SAMs上的传输。由于分子位阻设计，双自由基型SAMs具有较高的光热稳定性和电化学稳定性，以及更好的组装均匀性和大面积溶液可加工性。采用先进的扫描电化学电池显微镜-薄层循环伏安法技术精确测定了载流子转移速率、稳定性和组装性能。最终，PSCs的效率超过26.3%，微型模块（10.05 cm 2）的效率达到23.6%，钙钛矿硅串联器件（1 cm 2）的效率超过34.2%。psc维持>；在45°C下跟踪2000小时后达到97%。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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