A chlorinated polymer promoted analogue co-donors for efficient ternary all-polymer solar cells

论文摘要

The efficient ternary all-polymer solar cells(PSCs) are designed and fabricated, using a polymer acceptor of NDP-V-C7 and analogue co-donors containing a chlorinated polymer PBCl T and classical PTB7-Th. PBCl T and PTB7-Th possess very similar chemical structure and matched energy levels to form the cascade of the co-donors. Meanwhile, benefiting from those analogous polymer structures, there is little influence of the morphology in blend film compared to their pristine polymer films. The binary PBCl T:NDP-V-C7 devices exhibit a high open-circuit voltage(Voc) due to the deep HOMO level of PBCl T. The Vocof all-PSCs could be finely manipulated by adjusting the content of PBCl T in blend film. The ternary all-PSCs have the more balanced charge mobility and prolonged carrier lifetime compared to the binary devices. The PBCl T also help improve the miscibility of ternary blend and suppress crystallization in films, bringing about favorable morphology with appropriate orientation and surface roughness in blend film. With the optimal processing, the champion ternary all-PSCs obtain a high PCE of 9.03%, which is about 10% enhancement compared to that of binary device. The results indicate that the ternary approach using analogue co-donors is a practical method to enhance the performance of all-PSCs.

论文目录

  • 1 Introduction
  • 2 Results and discussion
  •   2.1 Chemical structures, optical and electrical proper-ties
  •   2.2 Photovoltaic performance
  •   2.3 Investigation of charge dynamics
  •   2.4 Thermodynamics analysis
  •   2.5 Morphology study
  • 3 Conclusions
  • 文章来源

    类型: 期刊论文

    作者: Hui Chen,Yikun Guo,Pengjie Chao,Longzhu Liu,Wei Chen,Dahui Zhao,Feng He

    来源: Science China(Chemistry) 2019年02期

    年度: 2019

    分类: 工程科技Ⅰ辑,工程科技Ⅱ辑

    专业: 电力工业

    单位: Department of Chemistry and Shenzhen Grubbs Institute, Southern University of Science and Technology,Beijing National Laboratory for Molecular Sciences, Center for Soft Matter Science and Engineering, Key Lab of Polymer Chemistry &Physics of the Ministry of Education, College of Chemistry, Peking University,Materials Science Division, Argonne National Laboratory,Institute for Molecular Engineering, the University of Chicago

    基金: supported by the SUSTech,the Recruitment Program of Global Youth Experts of China,the National Natural Science Foundation of China (51773087,21733005),the Natural Science Foundation of Guangdong Province (2016A030313637),Shenzhen Fundamental Research Program (JCYJ20170817111214740),Shenzhen Nobel Prize Scientists Laboratory Project (C17783101)

    分类号: TM914.4

    页码: 238-244

    总页数: 7

    文件大小: 2507K

    下载量: 22

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