Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers

Jiang Huang; Hanyu Wang; Kangrong Yan; Xiaohua Zhang; Hongzheng Chen; Chang-Zhi Li; Junsheng Yu

doi:10.1002/adma.201606729

Highly Efficient Organic Solar Cells Consisting of Double Bulk Heterojunction Layers

Adv Mater. 2017 May;29(19). doi: 10.1002/adma.201606729. Epub 2017 Mar 15.

Authors

Jiang Huang¹, Hanyu Wang¹, Kangrong Yan², Xiaohua Zhang¹, Hongzheng Chen², Chang-Zhi Li², Junsheng Yu¹

Affiliations

¹ State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Optoelectronic Information, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, P. R. China.
² MOE Key Laboratory of Macromolecular Synthesis and Functionalization, State Key Laboratory of Silicon Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.

PMID: 28295706
DOI: 10.1002/adma.201606729

Abstract

An organic solar cell (OSCs) containing double bulk heterojunction (BHJ) layers, namely, double-BHJ OSCs is constructed via stamp transferring of low bandgap BHJ atop of mediate bandgap active layers. Such devices allow a large gain in photocurrent to be obtained due to enhanced photoharvest, without suffering much from the fill factor drop usually seen in thick-layer-based devices. Overall, double-BHJ OSC with optimal ≈50 nm near-infrared PDPP3T:PC₇₁ BM layer atop of ≈200 nm PTB7-Th:PC₇₁ BM BHJ results in high power conversion efficiencies over 12%.

Keywords: double bulk heterojunctions; mobility; organic solar cells; power conversion efficiency; stamping transfer method.