Ternary Organic Photovoltaics Prepared by Sequential Deposition of Single Donor and Binary Acceptors

• DOI: 10.1021/acsami.8b07199
• Publication Date: 2018-07-30T10:56:04Z
• Authors: Yunju Cho; Thanh Luan Nguyen; Hyerim Oh; Ka Yeon Ryu; Han Young Woo; Kyungkon Kim
• Keywords: Deposition

Binary organic photovoltaics (OPVs) fabricated by single-step (SS) deposition of a binary blend polymer (or small molecule) donor and fullerene acceptor (SS OPV) are widely utilized. To improve the OPV performance, SS ternary OPVs utilizing consisting two one) electron donor(s) one two) acceptor(s) have been studied. require more sensitive complex optimization processes to optimize bulk heterojunctions with bicontinuous nanoscale phase separation acceptor. We demonstrated novel sequential (SQ) single mixture phenyl-C71-butyric acid methyl ester (PCBM) nonfullerene acceptor, 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene (ITIC). In SQ OPV, PCBM effectively created pathway for charge transport polymer, ITIC mainly enhanced light absorption photovoltage. This complementary effect was not observed in an same acceptors. Due these effects, exhibited power conversion efficiency 6.22%, which 52 37% higher than that respectively. addition, thermal stability found be superior OPV.