In-situ formation of a new cation renders perovskite solar modules with a record efficiency and long-term stability  

作　　者：Shanxiao Lin Xixing Wen Xiuwen Xu 

机构地区：[1]College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,China

出　　处：《Science China Chemistry》2025年第2期409-410,共2页中国科学(化学英文版)

摘　　要：Over the past 14 years,the efficiency of perovskite solar cells has surged from 3.8% to 26.7%[1],establishing it as an unrivaled choice for next-generation photovoltaics.However,maintaining the long-term stability of perovskite solar modules(PSMs)remains a challenge.In particular,the thermal-and light-induced changes in crystal structure,composition,and optoelectronic properties are the primary causes of device degradation,currently considered the Achilles’heel that hinders its commercialization[2–4].Now,writing in Science,Ding et al.[5]achieve a milestone by overcoming the thermal-and light-induced degradation,rendering the PSM with a record efficiency of 23.2% and a T80(time to 20% efficiency loss)over 4,000 h at 85℃ and 85%relative humidity(RH)under light illumination.The key behind this milestone is to utilize the cation reactivity to in-situ form methyl tetrahydrotriazinium([MTTZ]+,a new cation)and dimethylammonium([DMA]+)in precursor solution(Figure 1a).These cations remarkably modulate perovskite crystallization and stabilize the perovskite.

关 键 词：PEROVSKITE stability MODULES 

分 类 号：O61[理学—无机化学]