title: Improving the charge carrier transport of organic solar cells by incorporating a deep energy level molecule.
abstract: Tetrafluoro-tetracyanoquinodimethane (F4-TCNQ), a strong molecular acceptor, has been proved to be an excellent candidate to achieve the p-type doping effect. When F4-TCNQ is incorporated into a poly(3-hexylthiophene) (P3HT): indene-C60bisadduct (ICBA) active layer, superior behavior upon inducing polymer donor excited electron transport is demonstrated due to the addition of a deep-lying lowest unoccupied molecular orbital (LUMO) from F4-TCNQ, leading to the realization of organic solar cells (OSCs) with an improved power conversion efficiency (PCE) of 5.83%, accounting for 29.6% enhancement. In the system of active layer, the low LUMO of F4-TCNQ can easily accept electrons, remarkably reducing electron/hole recombination, which contributes to the enhancement of the photoconductivity and charge carrier mobility, resulting in higher short-circuit current density (Jsc), and achieving a more balanced charge carrier transport, as well as an ideal fill factor (FF).
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Chunyu
authors.initials: C
authors.lastname: Liu
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Zhiqi
authors.initials: Z
authors.lastname: Li
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Xinyuan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Wenbin
authors.initials: W
authors.lastname: Guo
authors.affiliation: College of Instrumentation & Electrical Engineering, Jilin University, 938 Ximinzhu Street, Changchun 130061, People's Republic of China.
authors.forename: Liu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: School of Electronic Engineering, South China Agricultural University, Guangzhou, 510642, China.
authors.forename: Yongbing
authors.initials: Y
authors.lastname: Long
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn ruansp@jlu.edu.cn.
authors.forename: Shengping
authors.initials: S
authors.lastname: Ruan