In order to improve the efficiency and stability of inverted three-dimensional(3D)or quasi-2D perovskite solar cells(PSCs)for future commercialization,exploring high efficient dopant-free polymer hole-transporting materials(HTMs)is still desired and meaningful.One simple and efficient way to achieve high performance dopant-free HTMs is to synthesize novel non-conjugated side-chain polymers via rational molecular design.In this work,N-(4-methoxyphenyl)-9,9-dimethyl-9H-fluoren-2-amine(FMeNPh)groups are introduced into the poly(N-vinylcarbazole)(PVK)side chains to afford two non-conjugated polymers PVCz-DFMeNPh and PVCz-FMeNPh as dopant-free HTMs in inverted quasi-2D PSCs.Benefited from the flexible properties of polyethylene backbone and excellent optoelectronic nat-ures of FMeNPh side-chain groups,PVCz-DFMeNPh with more FMeNPh units exhibited excellent thermal stability,well-matched energy levels and improved charge mobility as compared to PTAA and PVCz-FMeNPh.Moreover,the morphologies investigation of quasi-2D perovskite on PVCz-DFMeNPh shows more compact and homogeneous perovskite films than those on PTAA and PVCz-FMeNPh.As a result,the dopant-free PVCz-DFMeNPh based inverted quasi-2D PSCs deliver power conversion efficiency(PCE)up to 18.44％as well as negligible hysteresis and favorable long-term stability,which represents as excellent performance reported to date for inverted quasi-2D PSCs.The results demonstrate the great potentials of constructing non-conjugated side-chain polymer HTMs based on phenylfluorenamine-func tionalized PVK for the development of high efficient and stable inverted 3D or quasi-2D PSCs.

Zhengwu Pan;Han Gao;Yingying Yang;Qin Zou;Darui Peng;Pinghui Yang;Jiangli Cai;Jin Qian;Jiewei Li;Chengrong Yin;Nana Wang;Renzhi Li;Jianpu Wang;Wei Huang

Key Laboratory of Flexible Electronics(KLOFE)&Institute of Advanced Materials(IAM),Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM),Nanjing Tech University(NanjingTech),Nanjing 211816,Jiangsu,China;Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Nanjing University of Posts&Telecommunications,Nanjing 210023,Jiangsu,China

能源化学

[1]Zhengwu Pan;Han Gao;Yingying Yang;Qin Zou;Darui Peng;Pinghui Yang;Jiangli Cai;Jin Qian;Jiewei Li;Chengrong Yin;Nana Wang;Renzhi Li;Jianpu Wang;Wei Huang-.Phenylfluorenamine-functionalized poly(N-vinylcarbazole)s as dopant-free polymer hole-transporting materials for inverted quasi-2D perovskite solar cells)[J].能源化学,2022(06):123-131

Phenylfluorenamine,vinylcarbazole,fluoren,FMeNPh,PVCz,DFMeNPh,phenylfluorenamine

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