Ternary Organic Photovoltaics Prepared by Sequential Deposition of Single Donor and Binary Acceptors
- 주제(키워드) ternary organic solar cell , sequential solution deposition , nonfullerene acceptor , binary acceptor , thermal stability
- 주제(기타) Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Cho, Yunju; Oh, Hyerim; Ryu, Ka Yeon; Kim, Kyungkon] Ewha Womans Univ, Dept Chem & Nano Sci, Seoul 03760, South Korea; [Thanh Luan Nguyen; Woo, Han Young] Korea Univ, Dept Chem, Seoul 136713, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2018
- URI http://www.dcollection.net/handler/ewha/000000156588
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acsami.8b07199
초록/요약
Binary organic photovoltaics (OPVs) fabricated by single-step (SS) deposition of a binary blend of polymer (or small molecule) donor and fullerene acceptor (SS binary OPV) are widely utilized. To improve the OPV performance, SS ternary OPVs utilizing a ternary blend consisting of two (or one) electron donor(s) and one (or two) electron acceptor(s) have been studied. SS ternary OPVs require more sensitive and complex optimization processes to optimize bulk heterojunctions with bicontinuous nanoscale phase separation of the donor and acceptor. We demonstrated a novel ternary OPV fabricated by sequential (SQ) deposition of a single polymer donor and a binary mixture consisting of a phenyl-C-71-butyric acid methyl ester (PCBM) and nonfullerene acceptor, 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylpheny1)-dithieno [2,3'-d']-s-indaceno[1,2-b:5,6-b'] dithiophene (ITIC). In the SQ ternary OPV, PCBM effectively created a bicontinuous pathway for charge transport with a polymer, and ITIC mainly enhanced light absorption and photovoltage. This complementary effect was not observed in an SS ternary OPV utilizing the same donor and acceptors. Due to these complementary effects, the SQ ternary OPV exhibited a power conversion efficiency of 6.22%, which was 52 and 37% higher than that of the SQ binary OPV and the SS ternary OPV, respectively. In addition, the thermal stability of the SQ ternary OPV was found to be superior to that of the SS ternary OPV.
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