TY - JOUR
T1 - Ternary Organic Photovoltaics Prepared by Sequential Deposition of Single Donor and Binary Acceptors
AU - Cho, Yunju
AU - Nguyen, Thanh Luan
AU - Oh, Hyerim
AU - Ryu, Ka Yeon
AU - Woo, Han Young
AU - Kim, Kyungkon
N1 - Funding Information:
This study was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) (2015M1A2A2057506, 2012M3A6A7055540, and 2016M1A2A2940914) and by Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20163030013900).
Publisher Copyright:
© 2018 American Chemical Society.
PY - 2018/8/22
Y1 - 2018/8/22
N2 - 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-C71-butyric acid methyl ester (PCBM) and 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 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.
AB - 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-C71-butyric acid methyl ester (PCBM) and 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 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.
KW - binary acceptor
KW - nonfullerene acceptor
KW - sequential solution deposition
KW - ternary organic solar cell
KW - thermal stability
UR - http://www.scopus.com/inward/record.url?scp=85051126483&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b07199
DO - 10.1021/acsami.8b07199
M3 - Article
C2 - 30058325
AN - SCOPUS:85051126483
SN - 1944-8244
VL - 10
SP - 27757
EP - 27763
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 33
ER -