期刊
ORGANIC ELECTRONICS
卷 26, 期 -, 页码 55-60出版社
ELSEVIER
DOI: 10.1016/j.orgel.2015.07.017
关键词
Unsubstituted polyselenophene; Polymer solar cells; Bilayer heterojunction; Vapor printing; Chemical vapor deposition
资金
- Eni SpA under the Eni-MIT Solar Frontiers Center
- Samsung fellowship from the Samsung Foundation of Culture
- National Science Foundation Graduate Research Fellowship
- United States Army Research Laboratory
- United States Army Research Office through the Institute for Soldier Nanotechnologies [W911NF-13-D-0001]
Polyselenophene (PSe) donor layers are successfully integrated into organic photovoltaic devices (OPV) for the first time. Thin, patterned films of this insoluble semiconductor were fabricated using a vacuum-based vapor-printing technique, oxidative chemical vapor deposition (oCVD) combined with in-situ shadow masking. The vapor-printed PSe exhibits a reduced optical bandgap of 1.76 eV and enhanced photo-responsivity in the red compared to its sulfur containing analog, polythiophene. These relative advantages are most likely explained by selenium's enhanced electron-donating character compared to sulfur. The HOMO level of PSe was determined to be at -4.85 eV. The maximum power conversion efficiency achieved was 0.4% using a bilayer heterojunction device architecture with C-60 as the donor. (C) 2015 Elsevier B.V. All rights reserved.
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