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- Title
Low-temperature photo-activated inorganic electron transport layers for flexible inverted polymer solar cells.
- Authors
Lee, Jung-Wook; Lee, Soo-Hyoung; Kim, Yong-Hoon; Park, Sung
- Abstract
A simple and versatile route of forming sol-gel-derived metal oxide n-type electron transport layers (ETLs) for flexible inverted polymer solar cells (PSCs) is proposed using low-temperature photochemical activation process. The photochemical activation, which is induced by deep ultraviolet irradiation on sol-gel films, allows formation of metal oxide n-type ETLs such as zinc oxide (ZnO) and indium gallium zinc oxide films at a low temperature. Compared to poly(3-hexylthiophene)/phenyl-C-butyric acid methyl ester inverted PSCs with thermally annealed ZnO ETLs (optimized efficiency of 3.26 ± 0.03 %), the inverted PSCs with photo-activated ZnO ETLs showed an improved efficiency of 3.60 ± 0.02 %. The enhanced photovoltaic property is attributed to efficient charge collection from low overall series resistance and high surface area-to-geometric area ratio by the photo-activated ZnO ETLs.
- Subjects
LOW temperatures; ELECTRON transport; SOLAR cells; SOL-gel processes; PHOTOCHEMISTRY; ZINC oxide
- Publication
Applied Physics A: Materials Science & Processing, 2014, Vol 116, Issue 4, p2087
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-014-8407-2