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

Huang, Jiang; Carpenter, Joshua H; Li, Chang-Zhi; Yu, Jun-Sheng; Ade, Harald; Jen, Alex K-Y · Adv Mater · 2016

basic_science · Level V

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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%.