Low-cost dopant-free fluoranthene-based branched hole transporting materials for efficient and stable n-i-p perovskite solar cells  

作　　者：Xinyu Yu Fei Wu Xianglang Sun Linna Zhu Baoyu Xia Zhong'an Li 

机构地区：[1]Key Laboratory for Material Chemistry of Energy Conversion and Storage,Ministry of Education,Hubei Key Laboratory of Material Chemistry and Service Failure,School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energy,Faculty of Materials&Energy,Southwest University,Chongqing 400715,China

出　　处：《Chinese Chemical Letters》2024年第10期187-193,共7页中国化学快报（英文版）

基　　金：supported by National Key Research&Development Program of China(No.2023YFE0210900);National Natural Science Foundation of China(No.21975085);Excellent Youth Foundation of Hubei Scientific Committee(No.2021CFA065);open Fund of Hubei Key Laboratory of Material Chemistry and Service Failure(No.2023MCF02)。

摘　　要：It has been widely recognized that hole transporting materials(HTMs)play a key role in the rapid progress of perovskite solar cells(PVSCs).However,common organic HTMs such as spiro-OMe TAD not only suffer from high synthetic costs,but also usually require the additional chemical doping process to improve their hole transport ability,which unfortunately induces the terrible stability issue.Therefore,it is urgent to develop low-cost dopant-free HTMs for efficient and stable PVSCs.In this work,we have successfully developed a new class of efficient dopant-free fluoranthene-based HTMs(TPF1–5)with quite low lab synthetic costs by combining donor-acceptor and branched structure designs.The detailed structure-property study revealed that tuning the twisted arms at different substitution sites would regulate the intermolecular interactions and film-forming ability,thereby significantly affecting the performance of the HTMs.By applying these HTMs in conventional PVSCs,the dopant-free TPF1-based devices not only achieved the best efficiency of 21.76%,which is comparable to that of the doped spiro-OMeTAD control devices,but also showed much better operational stability,which maintained over 87%of the initial efficiency under maximum power point tracking after 1038 h.

关 键 词：Perovskite solar cells Holetransporting materials Dopant-free FLUORANTHENE LOW-COST 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TB34[一般工业技术—材料科学与工程]