Combining chlorination and sulfuration strategies for high-performance all-small-molecule organic solar cells  

作　　者：Ruimin Zhou Chen Yang Wenjun Zou Muhammad Abdullah Adil Huan Li Min Lv Ziyun Huang Menglan Lv Jianqi Zhang Kun Lu Zhixiang Wei 

机构地区：[1]CAS Key Laboratory of Nanosystem and Hierarchical Fabrication,CAS Center for Excellence in Nanoscience,National Center for Nanoscience and Technology,Beijing 100190,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Sino-Danish Center for Education and Research,Sino-Danish College,University of Chinese Academy of Sciences,Beijing 100190,China [4]Nano-Science Center&Department of Chemistry,University of Copenhagen,Copenhagen DK-2100,Denmark [5]School of Chemical Engineering,Guizhou Institute of Technology,Guiyang 550003,Guizhou,China

出　　处：《Journal of Energy Chemistry》2021年第1期228-233,I0008,共7页能源化学（英文版）

基　　金：the financial support from the National Natural Science Foundation of China (Grant Nos. 21822503, 51973043, 21534003, 21721002, 51863002 and 51973042);the Ministry of Science and Technology of China (Grant No. 2016YFA0200700);Youth Innovation Promotion Association;K. C. Wong Education Foundation;the Chinese Academy of Sciences。

摘　　要：Three small-molecule donors based on dithieno [2,3-d:2’,3 ’-d’]-benzo[1,2-b:4,5-b’] dithiophene(DTBDT)unit were designed and synthesized by side chain regulation with chlorinated or/and sulfurated substitutions(namely ZR1,ZR1-Cl,and ZR1-S-Cl respectively),along with a crystalline non-fullerene acceptor IDIC-4 Cl with a chlorinated 1,1-dicyanomethylene-3-indanone(IC) end group.Energy levels,molar extinction coefficients and crystallinities of three donor molecules can be effectively altered by combining chlorination and sulfuration strategies.Especially,the ZR1-S-Cl exhibited the best absorption ability,lowest higher occupied molecular orbital(HOMO) energy level and highest crystallinity among three donors,resulting in the corresponding all-small-molecule organic solar cells to produce a high power conversion efficiency(PCE) of 12.05% with IDIC-4 Cl as an acceptor.

关 键 词：All-small-molecule Chlorination and sulfuration Fibrous morphology CRYSTALLINITY 

分 类 号：TM914.4[电气工程—电力电子与电力传动] O641.3[理学—物理化学]