End-Group Modifications with Bromine and Methyl in Nonfullerene Acceptors: The Effect of Isomerism

Chen, Lin1,2; Cao, Congcong1,2; Lai, Hanjian1,2; Zhu, Yulin1,2; Pu, Mingrui1,2; Zheng, Nan3; He, Feng1,2,4

2021-06-30

10.1021/acsami.1c08060

ACS Applied Materials & Interfaces   影响因子和分区

1944-8244

1944-8252

The development of isomeric molecules has been widely exploited in molecular structures associated with organic solar cells (OSC) and is an effective pathway to finely tune the photoelectric properties and device performance. The molecular properties of nonfullerene acceptors and the morphology of blend films can be effectively controlled by manipulating isomeric substituent positions on benzene-fused end-capping groups (EG) in acceptors. Here, three isomeric EGs were designed and synthesized which simultaneously possess an electron-withdrawing bromine and an electron-donating methyl substituent. By linking three isomeric EGs, (Br,Me), (Br,Me)-1, and (Br,Me)-2 each with the BTP-CHO core, three isomeric small-molecule acceptors (SMA) were obtained. The power conversion efficiency (PCE) of PM6:BTP-(Br,Me)-1-based OSCs is 13.43%, is much higher than that of PM6:BTP-(Br,Me)- (11.92%) and PM6:BTP-(Br,Me)-2-(11.08%) based devices. Our results show that isomeric EGs can provide strategies to tune the absorption spectra of SMAs, intramolecular charge transfer (ICT) and electron mobility of organic semiconductor device, and ultimately increase the performance of nonfullerene acceptors.

isomerism methylation bromination nonfullerene acceptor organic solar cell

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[21733005,51773087,21975115] ; Shenzhen Fundamental Research Program["KQJSCX20180319114442157","JCYJ20170817111214740","JCYJ20180302180238419"] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06G587] ; Shenzhen Sci-Tech Fund[KYTDPT20181011104007] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002]

Science & Technology - Other Topics ; Materials Science

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000670430100046

AMER CHEMICAL SOC

20212910648653

Bromine ; Charge transfer ; Conversion efficiency ; Molecules ; Organic solar cells ; Semiconductor devices ; Stereochemistry

Energy Conversion Issues:525.5 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemistry:801 ; Chemical Reactions:802.2 ; Inorganic Compounds:804.2 ; Atomic and Molecular Physics:931.3

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Grubbs Inst, Shenzhen 518055, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
3.South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Peoples R China
4.Southern Univ Sci & Technol, Guangdong Prov Key Lab Catalysis, Shenzhen 518055, Peoples R China

Chen, Lin,Cao, Congcong,Lai, Hanjian,et al. End-Group Modifications with Bromine and Methyl in Nonfullerene Acceptors: The Effect of Isomerism[J]. ACS Applied Materials & Interfaces,2021,13(25):29737-29745.

Chen, Lin.,Cao, Congcong.,Lai, Hanjian.,Zhu, Yulin.,Pu, Mingrui.,...&He, Feng.(2021).End-Group Modifications with Bromine and Methyl in Nonfullerene Acceptors: The Effect of Isomerism.ACS Applied Materials & Interfaces,13(25),29737-29745.

Chen, Lin,et al."End-Group Modifications with Bromine and Methyl in Nonfullerene Acceptors: The Effect of Isomerism".ACS Applied Materials & Interfaces 13.25(2021):29737-29745.