S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Material Science and Engineering (재료공학부) Theses (Master's Degree_재료공학부)
Structural Approach for High Performance Solution-Processed Organic Solar Cells : Acetylene-incorporated Pyrene Derivatives
- 공과대학 재료공학부(하이브리드 재료)
- Issue Date
- 서울대학교 대학원
- 학위논문 (석사)-- 서울대학교 대학원 : 재료공학부(하이브리드 재료), 2012. 8. 박수영.
- 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%.