文献类型：期刊文献

英文题名：Mechanical strengthening of a perovskite-substrate heterointerface for highly stable solar cells

作者：Leng, Xuesong[1];Zheng, Yichu[2];He, Jingjing[3];Shen, Benben[1];Wang, Haonan[1];Li, Qing[1];Liu, Xinyi[1];Lin, Miaoyu[1];Shi, Yifeng[4,5];Wei, Zhanpeng[1];Peng, Yu[1];Yang, Hua Gui[1];Niu, Qiang[3];Yang, Shuang[1];Hou, Yu[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Shanghai Frontiers Sci Ctr Optogenet Tech Cell Met, Sch Mat Sci & Engn,Key Lab Ultrafine Mat,Minist Ed, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Sch Mechatron Engn & Automat, Shanghai 200444, Peoples R China;[3]Inner Mongolia Erdos Elect Power & Met Grp Co Ltd, Natl Enterprise Technol Ctr, Ordos 016064, Inner Mongolia, Peoples R China;[4]Shanghai Univ, Sch Microelect, Shanghai 201800, Peoples R China;[5]Shanghai Inst Opt & Fine Mech, Chinese Acad Sci, Lab Thin Film Opt, Shanghai 201800, Peoples R China

年份：2024

卷号：17

期号：12

起止页码：4295

外文期刊名：ENERGY & ENVIRONMENTAL SCIENCE

收录：;EI(收录号：20242216183142);WOS:【SCI-EXPANDED(收录号:WOS:001233458600001)】；

基金：This work was financially supported by the National Ten Thousand Talent Program for Young Top-notch Talent, the National Natural Science Foundation of China (22379044, 52203330, and 12304109), the Science and Technology Commission of Shanghai Municipality (21DZ1207101 and 23520710700), the Key Program of the National Natural Science Foundation of China (22239001), the Shanghai Pilot Program for Basic Research (22TQ1400100-5), the "Dawn" Program of Shanghai Education Commission (22SG28), the Shanghai Municipal Natural Science Foundation (22ZR1418000), the Shanghai Sailing Program (22YF1413100 and 22YF1410000), the Postdoctoral Research Foundation of China (2021M701190), the Fundamental Research Funds for the Central Universities (JKVD1241041), the Major Science and Technology Projects of Inner Mongolia Autonomous Region (2021ZD0042), the Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400) and the Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission).

语种：英文

外文关键词：Conversion efficiency - Crystalline silicon cells - Morphology - Perovskite solar cells - Silicon solar cells

摘要：Perovskite solar cells (PSCs) have shown power conversion efficiencies (PCEs) of over 26% that rival crystalline silicon cells, but their projected application was largely postponed by the device instability, particularly the degradation that originated from the defective bottom interfaces. Here, we introduce a cohesive guanidine polymer, as macromolecular glue, to strengthen the buried interface, resulting in a mechanically robust and passivated bottom interface. We found that the guanidine motifs can chemically couple the perovskite/substrate layers and remarkably restrict the interfacial ionic migration and morphology variation under an environmental stimulus. The resulting solar cells presented over 25% efficiency and maintained >97.5% of their initial efficiency in long-term operational stability tests with continuous 1-sun illumination at 55 degrees C for >1600 hours. The geometric impact of these nanostructures during solar cell degradation was further analyzed by finite element simulation, which revealed that the void expansion would disturb the charge carrier distribution and transport for inferior carrier collection and high recombination velocity. Our strategy offers valuable insights into the design and development of long-lifetime perovskite devices with robust and stable interfaces.