近日，浙江大学余学功团队报道了钙钛矿硅叠层太阳能电池中通过工程自组装单层控制钙钛矿结晶。该研究于2025年10月20日发表在《自然—光子学》杂志上。

在宽带隙钙钛矿和自组装单层（SAM）之间界面上的埋藏缺陷限制了p-i-n太阳能电池的性能，特别是在纹理单片钙钛矿-硅串联太阳能电池中。

研究组揭示了常规地对空材料上不受控制的钙钛矿结晶动力学驱动了埋藏界面上电子缺陷和形态退化的共同演化。这源于钙钛矿前驱体溶液与SAM之间的结构和能量不相容。为了精确控制钙钛矿结晶，研究组开发了一种定制的SAM，以减轻缺陷的形成并增强界面电子耦合。

该方法集成到钙钛矿-硅串联太阳能电池中，对于面积为1平方厘米的器件，功率转换效率为33.86%（认证为33.59%），对于面积为16平方厘米的器件，功率转换效率为29.25%（认证为28.53%）。串联装置表现出显著的运行稳定性，在2000℃、1倍太阳光照下运行后保持了90%以上的初始功率转换效率。

附：英文原文

Title: Perovskite crystallization control via an engineered self-assembled monolayer in perovskite–silicon tandem solar cells

Author: Zhang, Daoyong, Yan, Boning, Xia, Rui, Li, Biao, Li, Ruilin, Hang, Pengjie, Xin, Haimeng, Wei, Jiyao, Lei, Ming, Chen, Yifeng, Gao, Jifan, Zhang, Hengyu, Ni, Zhenyi, Yang, Deren, Yu, Xuegong

Issue&Volume: 2025-10-20

Abstract: Buried defects at the interface between the wide-bandgap perovskite and the self-assembled monolayer (SAM) limit the performance of p–i–n solar cells, particularly in textured monolithic perovskite–silicon tandem solar cells. Here we reveal that uncontrolled perovskite crystallization dynamics on conventional SAMs drives the co-evolution of electronic defects and morphological degradation at the buried interface. This stems from structural and energetic incompatibility between the perovskite precursor solution and the SAM. To precisely control the perovskite crystallization, we develop a tailored SAM that mitigates defect formation and enhances interfacial electronic coupling. Integrated into a perovskite–silicon tandem solar cell, this approach enables a power conversion efficiency of 33.86% (certified as 33.59%) for a device with a 1-cm2 area and a power conversion efficiency of 29.25% (certified as 28.53%) for an area of 16cm2. The tandem device demonstrates remarkable operational stability, retaining more than 90% of the initial power conversion efficiency after 2,000h of operational under 1-sun illumination.

DOI: 10.1038/s41566-025-01778-y

Source: https://www.nature.com/articles/s41566-025-01778-y