title: Highly Efficient Organic Solar Cells with Improved Vertical Donor-Acceptor Compositional Gradient Via an Inverted Off-Center Spinning Method.
abstract: A novel, yet simple solution fabrication technique to address the trade-off between photocurrent and fill factor in thick bulk heterojunction organic solar cells is described. The inverted off-center spinning technique promotes a vertical gradient of the donor-acceptor phase-separated morphology, enabling devices with near 100% internal quantum efficiency and a high power conversion efficiency of 10.95%.
authors.affiliation: Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.|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.
authors.forename: Jiang
authors.initials: J
authors.lastname: Huang
authors.affiliation: Department of Physics and Organic and Carbon Electronics Laboratory, North Carolina State University, Raleigh, NC, 27695-8202, USA.
authors.forename: Joshua H
authors.initials: JH
authors.lastname: Carpenter
authors.affiliation: Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.|Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
authors.forename: Chang-Zhi
authors.initials: CZ
authors.lastname: Li
authors.affiliation: 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.
authors.forename: Jun-Sheng
authors.initials: JS
authors.lastname: Yu
authors.affiliation: Department of Physics and Organic and Carbon Electronics Laboratory, North Carolina State University, Raleigh, NC, 27695-8202, USA.
authors.forename: Harald
authors.initials: H
authors.lastname: Ade
authors.affiliation: Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.
authors.forename: Alex K-Y
authors.initials: AK
authors.lastname: Jen
keywords: bulk heterojunctions; off-center spin; organic solar cells; power conversion efficiency