Improved Efficiency of Polymer Solar Cells by Modifying the Side Chain of Wide-Band Gap Conjugated Polymers Containing Pyrrolo[3,4- f]benzotriazole-5,7(6 H)-dione Moiety

Journal article
(Original article)


Publication Details

Author(s): Zhu P, Fan B, Du X, Tang X, Li N, Liu F, Ying L, Li Z, Zhong W, Brabec C, Huang F, Cao Y
Journal: ACS Applied Materials and Interfaces
Publisher: American Chemical Society
Publication year: 2018
Volume: 10
Journal issue: 26
Pages range: 22495-22503
ISSN: 1944-8244
Language: English


Abstract

wo novel wide-band gap donor-acceptor-type conjugated
copolymers, PTzBI-S and PTzBI-Ph, are designed and synthesized, based
on alkylthio-thienyl- or alkylphenyl-substituted benzodithiophene (BDT)
derivatives as the electron-donating unit and
pyrrolo[3,4-f]benzotriazole-5,7(6H)-dione as the electron-withdrawing
unit. The as-generated copolymers show the comparable optical and
electrochemical properties. The alkylthio-thienyl-substituted BDT unit
facilities a benign decrease of the highest occupied molecular orbital
(HOMO) levels. This consequently enhances open-circuit voltages (VOC) over 0.9 V in relevant solar cells with the fullerene acceptor ([6, 6]-phenyl-C71-butyric acid methyl ester, PC71BM)
or the nonfullerene acceptor
(3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene,
ITIC). The combination studies of Fourier transform photocurrent
spectroscopy and electroluminescence further rationalize the VOC difference between solar cells with fullerene and nonfullerene acceptors. An impressively high power conversion efficiency of 10.19% is obtained for the device based on PTzBI-Ph:ITIC, outperforming the 8.84% achieved by the PC71BM-based
device. Our results demonstrate that the modification of substituents
of BDT units can effectively decrease the HOMO level and consequently
improve VOC, ultimately allowing the attainment of high-efficiency polymer solar cells


FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Institute Materials for Electronics and Energy Technology (i-MEET)
Du, Xiaoyan
Institute Materials for Electronics and Energy Technology (i-MEET)
Li, Ning Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Tang, Xiaofeng
Institute Materials for Electronics and Energy Technology (i-MEET)


External institutions
Shanghai Jiao Tong University / 上海交通大学
South China University of Technology (SCUT) / 华南理工大学


How to cite

APA:
Zhu, P., Fan, B., Du, X., Tang, X., Li, N., Liu, F.,... Cao, Y. (2018). Improved Efficiency of Polymer Solar Cells by Modifying the Side Chain of Wide-Band Gap Conjugated Polymers Containing Pyrrolo[3,4- f]benzotriazole-5,7(6 H)-dione Moiety. ACS Applied Materials and Interfaces, 10(26), 22495-22503. https://dx.doi.org/10.1021/acsami.8b05700

MLA:
Zhu, Peng, et al. "Improved Efficiency of Polymer Solar Cells by Modifying the Side Chain of Wide-Band Gap Conjugated Polymers Containing Pyrrolo[3,4- f]benzotriazole-5,7(6 H)-dione Moiety." ACS Applied Materials and Interfaces 10.26 (2018): 22495-22503.

BibTeX: 

Last updated on 2019-20-03 at 11:38