Highly Efficient Organic Solar Cells with Improved Vertical Donor-Acceptor Compositional Gradient Via an Inverted Off-Center Spinning Method

• Published in: Advanced materials (Weinheim) Vol. 28; no. 5; pp. 967 - 974
• Main Authors: Huang, Jiang, Carpenter, Joshua H., Li, Chang-Zhi, Yu, Jun-Sheng, Ade, Harald, Jen, Alex K.-Y.
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 03.02.2016; Wiley
• Subjects: bulk heterojunctions; Energy conversion efficiency; Heterojunctions; off-center spin; organic solar cells; Photocurrent; Photovoltaic cells; power conversion efficiency; Solar cells; Spinning; Spinning (materials); Tradeoffs; organic solar cells; power conversion efficiency; bulk heterojunctions; off-center spin

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, en...