Synergistic fibrillization engineering in donor and acceptor phases enables high-performance all-polymer solar cells  

作　　者：Bin Zhang Yushou Zhao Xiaofeng Qin Aiqin Li Xinling Li Wenming Li Weile Guo Xiaolan Qin Zhicai He Yong Hua Menglan Lv Liming Ding 

机构地区：[1]Engineering Research Center for Energy Conversion and Storage Technology of Guizhou,School of Chemistry and Chemical Engineering,Guizhou University,Guiyang 550025,China [2]School of Chemical Engineering and Light Industry,Guangdong University of Technology,Guangzhou 510006,China [3]Institute of Polymer Optoelectronic Materials and Devices,State Key Laboratory of Luminescent Materials and Devices,South China University of Technology,Guangzhou 510640,China [4]School of Materials and Energy,Yunnan University,Kunming 650091,China

出　　处：《Nano Research》2025年第4期219-227,共9页纳米研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.52373175);Guizhou Provincial Basic Research Program(General Program)(No.zk[2025]603);the Highlevel Innovative Talents Foundation of Guizhou Province(No.QKHPTRC-GCC[2023]024);Natural Science Foundation of Guizhou Province(No.QKHPTRC-CXTD[2023]005);Science and Technology Innovation Team of Higher Education Department of Guizhou Province(No.QJJ[2023]053);Natural Science Foundation of Guizhou University(No.GZUTGH[2023]12);Science and Technology Innovation Team of Guizhou University(No.GZUKCT[2023]01);the National Key Research and Development Program of China(Nos.2022YFB3803300 and 2023YFE0116800);Beijing Natural Science Foundation(No.IS23037).

摘　　要：Recently,all-polymer solar cells(all-PSCs)have become an important organic photovoltaic technology,ascribing to their unique characteristics of high stability and mechanical endurance.However,the morphology control between polymer donor and polymer acceptor suffers from tough difficulties,resulting from the nature of rigid planarity and chain entanglement in the conjugated polymer backbones.In this work,we utilize an additive,1-chloro-naphthalene(CN),to regulate polymer chain stacking and orientation in D18:PY-IT system,resulting in the formation of versatile nano-scale polymer fibrillization between donor and acceptor phases.Consequently,the CN-modified D18:PY-IT blend film shows improved molecular stacking characteristics and distinct nano-scale bi-continuous phase separation.Attributing to the incorporation of CN additive in a bulk-heterojunction(BHJ)D18:PY-IT system,it exhibits higher photovoltaic performance than the as-cast and only thermal annealing(TA)treated devices,where the CN-based device provides a power conversion efficiency(PCE)of 17.31%,an open-circuit voltage(VOC)of 0.955 V,a short-circuit current density(JSC)of 24.16 mA·cm^(-2),and a fill factor(FF)of 74.99%,respectively.This is one of the highest photovoltaic performances reported in the D18:PY-IT based binary BHJ all-PSCs.Hence,it is evident that the morphology in all-PSCs can be feasibly modulated via incorporating appropriate additive into active layer for achieving excellent photovoltaic performance.

关 键 词：fibrillization engineering morphology control additive 1-chloro-naphthalene all-polymer solar cells 

分 类 号：TM914.4[电气工程—电力电子与电力传动]