Rational Design of Conjugated Polymers for d-Limonene Processed All-polymer Solar Cells with Small Energy Loss  

作　　者：Mei-Jing Li Bao-Bing Fan Wen-Kai Zhong Zhao-Mi-Yi Zeng Jing-Kun Xu Lei Ying 

机构地区：[1]Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China [2]School of Pharmacy,Jiangxi Science&Technology Normal University,Nanchang 330013,China [3]South China Institute of Collaborative Innovation,Dongguan 523808,China

出　　处：《Chinese Journal of Polymer Science》2020年第8期791-796,I0004,共7页高分子科学（英文版）

基　　金：Science Foundation of China(Nos.21822505,21905103);Dongguan Science and Technology Bureau(Nos.2018607201002,2019622163009);the Basic and Applied Basic Research Major Program of Guangdong Province(No.2019B030302007).

摘　　要：In this work,we designed and synthesized a novel naphthalenediimide-based n-type conjugated polymer PNDICI,which bears asymmetric backbone containing a 3-chlorothiophene unit.The asymmetric structure associated with steric effects of the chlorine atom imparts remarkable solubility to PNDICI in various organic solvents,enabling the fabrication of all-polymer solar cells(all-PSCs)by using an environmentally friendly solvent of d-limonene.Combined with a novel pyrrolo[3,4-f]benzotriazole-5,7(6H)-dione based p-type conjugated polymer P2F-Si with deep highest occupied molecular orbital energy level,the resulting d-limonene-processed all-PSCs presents an impressively high open-circuit voltage of approaching 1.0 V,corresponding to a very small energy loss of 0.49 eV.Through further morphology optimization by usingγ-valerolactone,we demonstrated an impressive device efficiency of 4.2%,which is among the best photovoltaic performance of devices processed using d-limonene and comparable to that processed by conventional solvent,suggesting the great promise of using greener solvent for fabricating high-performance all-PSCs.

关 键 词：All-polymer solar cells CHLORINATION Environmentally friendly solvent High open-circuit voltage Small energy loss 

分 类 号：TM914.4[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]