title: High efficiency all-polymer tandem solar cells.
abstract: In this work, we have reported for the first time an efficient all-polymer tandem cell using identical sub-cells based on P2F-DO:N2200. A high power conversion efficiency (PCE) of 6.70% was achieved, which is among the highest efficiencies for all polymer solar cells and 43% larger than the PCE of single junction cell. The largely improved device performance can be mainly attributed to the enhanced absorption of tandem cell. Meanwhile, the carrier collection in device remains efficient by optimizing the recombination layer and sub-cell film thickness. Thus tandem structure can become an easy approach to effectively boost the performance of current all polymer solar cells.
authors.affiliation: Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
authors.forename: Jianyu
authors.initials: J
authors.lastname: Yuan
authors.affiliation: Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
authors.forename: Jinan
authors.initials: J
authors.lastname: Gu
authors.affiliation: Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
authors.forename: Guozheng
authors.initials: G
authors.lastname: Shi
authors.affiliation: Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
authors.forename: Jianxia
authors.initials: J
authors.lastname: Sun
authors.affiliation: Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
authors.forename: Hai-Qiao
authors.initials: HQ
authors.lastname: Wang
authors.affiliation: Institute of Functional Nano &Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials &Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.
authors.forename: Wanli
authors.initials: W
authors.lastname: Ma