Статья

Graded bulk-heterojunction enables 17% binary organic solar cells via nonhalogenated open air coating

Ying ZhangDepartment of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong, ChinaKuan LiuDepartment of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong, China. [email protected]Jiaming HuangDepartment of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong, ChinaXinxin XiaDepartment of Physics, The Chinese University of Hong Kong, Hong Kong, ChinaJiupeng CaoDepartment of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, ChinaGuangming ZhaoDepartment of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, ChinaW.K. FongDepartment of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong, ChinaYe ZhuDepartment of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, ChinaFeng YanDepartment of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, ChinaYang YangXinhui LuDepartment of Physics, The Chinese University of Hong Kong, Hong Kong, ChinaGang LiDepartment of Electronic and Information Engineering, Research Institute for Smart Energy (RISE), The Hong Kong Polytechnic University, Hong Kong, China. [email protected]

2021en

ABI

Аннотация

Graded bulk-heterojunction (G-BHJ) with well-defined vertical phase separation has potential to surpass classical BHJ in organic solar cells (OSCs). In this work, an effective G-BHJ strategy via nonhalogenated solvent sequential deposition is demonstrated using nonfullerene acceptor (NFA) OSCs. Spin-coated G-BHJ OSCs deliver an outstanding 17.48% power conversion efficiency (PCE). Depth-profiling X-ray photoelectron spectroscopy (DP-XPS) and angle-dependent grazing incidence X-ray diffraction (GI-XRD) techniques enable the visualization of polymer/NFA composition and crystallinity gradient distributions, which benefit charge transport, and enable outstanding thick OSC PCEs (16.25% for 300 nm, 14.37% for 500 nm), which are among the highest reported. Moreover, the nonhalogenated solvent enabled G-BHJ OSC via open-air blade coating and achieved a record 16.77% PCE. The blade-coated G-BHJ has drastically different D-A crystallization kinetics, which suppresses the excessive aggregation induced unfavorable phase separation in BHJ. All these make G-BHJ a feasible and promising strategy towards highly efficient, eco- and manufacture friendly OSCs.

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Идентификаторы

DOI: 10.1038/s41467-021-25148-8

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar