title: Unraveling the effect of polymer dots doping in inverted low bandgap organic solar cells.
abstract: In this study, molecular doping with polymer dots was designed to unravel its effect on the photoconductivity in organic solar cells. The photocurrent in organic solar cells exhibited a considerable increase under optimal doping concentration, leading to an ultimate enhancement of power conversion efficiency from 2.30% to 3.64%. This can be attributed primarily to the improvement of the initial boost in charge carriers due to the background carriers induced by the polymer dots and increased tail absorption by the active layer. Based on single carrier device and impedance measurements, polymer dopant can efficiently decrease charge recombination and improve charge carriers mobilities. The obtained achievements pave an approach of molecular doping in affecting the operation of organic solar cells.
authors.affiliation: State Key Laboratory on Integrated Optoelectronics, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China. guowb@jlu.edu.cn.
authors.forename: Xinyuan
authors.initials: X
authors.lastname: Zhang
authors.forename: Chunyu
authors.initials: C
authors.lastname: Liu
authors.forename: Jinfeng
authors.initials: J
authors.lastname: Li
authors.forename: Yeyuan
authors.initials: Y
authors.lastname: He
authors.forename: Zhiqi
authors.initials: Z
authors.lastname: Li
authors.forename: Hao
authors.initials: H
authors.lastname: Li
authors.forename: Liang
authors.initials: L
authors.lastname: Shen
authors.forename: Wenbin
authors.initials: W
authors.lastname: Guo
authors.forename: Shengping
authors.initials: S
authors.lastname: Ruan
mesh_terms: D004553:Electric Conductivity; D037741:Fullerenes / Q000737:chemistry; D015394:Molecular Structure; D010316:Particle Size; D055668:Photochemical Processes; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy; D013499:Surface Properties
chemical_list: D037741:Fullerenes; D011108:Polymers