Ionic liquid engineering enables 1D/3D perovskite photovoltaics with > 25 % efficiency: A real-time study exploring formation mechanism of 1D perovskites

被引:1
作者
Wang, Fei [1 ,2 ]
Sun, Yonggui [2 ]
Wang, Taomiao [2 ]
Sun, Xiaokang [2 ]
Yang, Guo [2 ]
Li, Yongjun [2 ]
Li, Qiannan [2 ]
Liang, Xiao [1 ,2 ]
Zhou, Xianfang [1 ,2 ]
Lv, Jie [2 ]
Zhu, Quanyao [1 ]
Yang, Chunming [3 ]
Lin, Haoran [2 ]
Yuan, Mingjian [4 ]
Li, Gang [5 ]
Hu, Hanlin [2 ]
机构
[1] Wuhan Univ Technol, Sch Mat Sci & Engn, State Key Lab Adv Technol Mat Synth & Proc, Wuhan, Hubei, Peoples R China
[2] Shenzhen Polytech Univ, Hoffmann Inst Adv Mat, 7098 Liuxian Blvd, Shenzhen 518055, Peoples R China
[3] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai Synchrotron Radiat Fac, Shanghai 201204, Peoples R China
[4] Nankai Univ, Coll Chem, Tianjin, Peoples R China
[5] Hong Kong Polytech Univ, Res Inst Smart Energy RISE, Dept Elect & Informat Engn, Hung Hom,Kowloon, Hong Kong, Peoples R China
关键词
1D/3D perovskite; In-situ GIWAXS; Ionic liquid; Stability; SOLAR-CELLS; PASSIVATION; LAYER;
D O I
10.1016/j.nanoen.2024.110063
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The advancements in low-dimensional/three-dimensional (LD/3D) perovskite devices represent a promising approach to enhancing both the efficiency and stability of of perovskite solar cells (PSCs). However, while significant efforts have been dedicated to understanding the role of already formed low-dimensional perovskites in passivating defects, refining the work function, little attention has been given to the crystallization process of LD perovskites, particularly when induced by ionic liquids (ILs) as green and stable additive. In this work, the formation process of IL Tetrabutylammonium Thiocyanate (TBASCN)-induced 1D perovskite onto the 3D perovskite under varying annealing conditions were explored by in-situ Grazing-Incidence Wide-Angle X-ray Scattering (GIWAXS) technology, providing a comprehensive investigation into the distinct impacts of 1D perovskite formed under diverse annealing processes on device performance. Owing to the robust interaction and favorable binding energy between the IL TBASCN and perovskite components, coupled with the low formation energy of 1D perovskites, 1D perovskites exhibit rapid formation on the surface of 3D perovskites and display markedly distinct crystallization processes under distinguished annealing conditions. Achieving full crystallization of 1D perovskites necessitates optimal temperature of 100 degrees C and adequate duration of 100 s. Once fully crystallized, the highly crystalline 1D perovskites and anions SCN- present in ILs can synergistically passivate defects in 3D perovskites, mitigate ion migration and impeding moisture infiltration. Benefiting from the optimized formation process of 1D perovskites, the champion device achieves a power conversion efficiencie (PCE) of 25.18 % and retains 91.0 % of its initial efficiency after 2000 h under RH=40 %. Our research provides new insights for optimizing the formation process of LD perovskites induced by different materials and their application in high-performance LD/3D PSCs.
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页数:12
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