近日，中国科学院青岛生物能源与过程研究所逄淑平团队报道了稳定钙钛矿太阳能电池埋藏界面应变的原位动态调节。2025年11月24日出版的《自然—光子学》杂志发表了这项成果。
钙钛矿光伏的商业化面临严峻挑战，主要源于设备在光照、湿度和热量等环境压力下的退化，这成为工业应用的核心难题。
研究组提出了一种针对钙钛矿太阳能电池埋层界面的构象工程策略，基于添加剂的结构演变——从1,1-二苯乙烯到1-辛基-2-(1-苯基乙烯基)苯和二乙氨基羟基苯甲酰己基苯甲酸酯。研究组解耦了添加剂的作用，包括紫外线屏蔽、应变调节和化学钝化。结合原位表征，他们揭示了动态界面应变调节在光-暗循环中提升设备稳定性的关键作用。
研究组的设备在0.09 cm2和20.5 cm2活性面积下分别实现了26.47%和22.67%的功率转换效率。在最大功率点跟踪条件下，小面积器件在ISOS-L-1I（连续光照）测试中保持了96.2%的初始功率转换效率（1,132小时），在ISOS-LC-1（12小时昼夜循环）测试中保持了88.8%（348小时）。该研究通过构象工程驱动的多功能策略，为稳定高效的钙钛矿太阳能电池建立了创新设计范式。
附：英文原文
Title: In situ dynamic regulation of strain at the buried interface of stable perovskite solar cells
Author: Zhang, Jiakang, Yan, Wenjian, Li, Zhipeng, Jiang, Haokun, Peng, Cheng, Lan, Mengjiao, Sun, He, Yang, Jinxian, Wang, Yanbo, Li, Chongwen, Pang, Shuping, Zhou, Zhongmin
Issue&Volume: 2025-11-24
Abstract: The commercialization of perovskite photovoltaics faces significant hurdles due to device degradation under environmental stressors, such as illumination, humidity and heat, which represents a core challenge for industrial applications. Here we present a conformational engineering strategy targeting the buried interface of perovskite solar cells and based on the structural evolution of additives—from 1,1-diphenylethylene to 1-octyl-2-(1-phenylvinyl)benzene and diethylamino hydroxybenzoyl hexyl benzoate. We decouple the contributions of the additives, including ultraviolet shielding, strain regulation and chemical passivation. In conjunction with in situ characterization, we reveal that dynamic interfacial strain regulation plays a major role in improving device stability during light–dark cycling. Our devices achieve power conversion efficiencies of 26.47% and 22.67%, for active areas of 0.09cm2 and 20.5cm2, respectively. Under maximum power point tracking, small-area devices maintain 96.2% of their initial power conversion efficiency after 1,132h of testing in ISOS-L-1I (continuous illumination) and 88.8% after 348h in ISOS-LC-1 (12-h day–night cycling). This research establishes an innovative design paradigm for stable and efficient perovskite solar cells through a multifunctional strategy driven by conformational engineering.
DOI: 10.1038/s41566-025-01808-9
Source: https://www.nature.com/articles/s41566-025-01808-9