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Highly Efficient Organic Solar Cells with Improved Vertical Donor-Acceptor Compositional Gradient Via an Inverted
Jiang Huang1,2, Joshua H Carpenter3, Chang-Zhi Li1,4
1Department of Materials Science and Engineering, University of Washington, Seattle, WA, 98195, USA.
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%.
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