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Structural Approach for High Performance Solution-Processed Organic Solar Cells : Acetylene-incorporated Pyrene Derivatives

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Authors
문정욱
Advisor
박수영
Major
공과대학 재료공학부(하이브리드 재료)
Issue Date
2012-08
Publisher
서울대학교 대학원
Keywords
Organic solar cellsElectron donorsAcetylenePyrene
Description
학위논문 (석사)-- 서울대학교 대학원 : 재료공학부(하이브리드 재료), 2012. 8. 박수영.
Abstract
To explore effects of acetylene-incorporation, acetylene-bridged small molecules were successfully synthesized and their photophysical, electrochemical, thermal, and photovoltaic device properties were investigated. The acetylene-incorporation was intended to benefit reduced HOMO-LUMO band gap through extended conjugation, and also the increased ionization potential of the molecules. It is well known that the former is effective in increasing Jsc, while the latter in increasing Voc. Consistent with the expectation and DFT calculation result, acetylene-incorporated pyrene derivatives exhibited planar back-bone, conjugation extension, enhanced light absorption, and low HOMO energy level. Combined with the advanced properties, solution-processed organic solar cells based on a blend of DPP-A-PY(HD) as a donor and [6,6]-phenyl-C71-butyric-acid-methyl-ester (PC70BM) as an acceptor exhibited as high as Voc of 0.85V, Jsc of 8.89 mA cm-2, FF of 41.7% and PCEs of 3.15%.
Language
English
URI
http://hdl.handle.net/10371/123409
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Material Science and Engineering (재료공학부) Theses (Master's Degree_재료공학부)
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