Enhancing the Efficiency and Durability of Perovskite Solar Cells by Donor-Acceptor Covalent Organic Framework with Thiazolo[5,4-d]thiazole Unit  

作　　者：Liyi Yao Shuainan Liu Lin Li Bangdi Ge Wenyu Jiao Siyu Zong Xiaowei Song Donglei Zhou Zhiqiang Liang 

机构地区：[1]State Key Lab of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012 [2]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012 [3]Electron Microscopy Center,Jilin University,Changchun 130012

出　　处：《CCS Chemistry》2024年第7期1721-1730,共10页中国化学会会刊（英文）

基　　金：supported by the National Natural Science Foundation of China (grant nos.22375070 and 22288101);the Jilin Province Science and Technology Development Plan (grant nos.20220101048JC and 20210101112JC);the 111 Project the Ministry of Education of China (grant no.B17020).

摘　　要：Donor-Acceptor(D-A)alignment is considered a productive strategy to improve the charge separation efficiency of covalent organic frameworks(COFs)and enhance the charge-transfer yield(CTY)of COFs.Moreover,organic molecules containing heteroatoms can produce coordination interaction with PbI2 of perovskite precursor to affect the crystallization process,thereby impeding the decomposition and improving the stability of perovskite materials.Herein,a thiazolo[5,4-d]thiazole(TZ)-based D-A type COF_(TPDA-TZDA) was designed and synthesized from N,N,N′,N′-tetrakis(4-aminophenyl)-1,4-benzenediamine(TPDA)and 4,4′-(thiazolo[5,4-d]thiazole-2,5-diyl)dibenzaldehyde(TZDA).Upon incorporation into the FAPbI3 layer,COF_(TPDA-TZDA) not only restrained the perovskite defects and enhanced the grain size of perovskite films through the coordination effect of the N atoms of TZDA but also ameliorated the charge transport within the perovskite film,which was the benefit of the D-A structure of COF_(TPDA-TZDA).As a result,incorporation of COF_(TPDA-TZDA) into the perovskite solar cells(PSCs)led to a remarkable power conversion efficiency(PCE)of up to 23.51%.Furthermore,even after being stored in high relative humidity(RH≈60%)for 480 h,these PSCs maintained over 90.55%of their original PCE.This work sets the foundation for the development of highly efficient and stable PSCs by utilizing TZ-based D-A type COFs.

关 键 词：thiazolo[5 4-d]thiazole perovskite solar cells DONOR-ACCEPTOR covalent organic frameworks CHARGE-TRANSFER 

分 类 号：O61[理学—无机化学]