High-performance ternary polymer solar cells from a structurally similar polymer alloy
Journal article, 2017
High-efficiency ternary polymer solar cells (PSCs) are fabricated by using two donor polymers (PBDTTPD and PBDTTT-C-T) with similar polymer backbones and complementary absorption and PC71BM as the acceptor. A high power conversion efficiency (PCE) of 9.3% is achieved with a high short-circuit current density (J(sc)) of 17.2 mA cm(-2). The enhanced J(sc) and PCEs are mainly attributed to the broadened photoresponse of the ternary blend. Good miscibility of the two donor polymers is found due to the similar polymer main chains, leading to the desired morphology between the donors and PC71BM in the ternary blends. The trend of open-circuit voltage (V-oc) variations indicates the formation of a polymer alloy in this ternary blend. Our work demonstrates that using two donor polymers with similar backbone structures is a rational strategy for realizing high-performance ternary PSCs.
Chains
Small-Molecule
Nonfullerene Acceptors
Power Conversion Efficiency
Ir Sensitization
11-Percent Efficiency
Fullerene
Energy-Transfer
Author
W. F. Shen
Chinese Academy of Sciences
Qingdao University
W. Chen
Chinese Academy of Sciences
Qingdao University
D. Q. Zhu
Chinese Academy of Sciences
J. D. Zhang
Changchun Institute of Applied Chemistry Chinese Academy of Sciences
Xiaofeng Xu
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
H. X. Jiang
Chinese Academy of Sciences
T. Wang
Chinese Academy of Sciences
Ergang Wang
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
R. Q. Yang
Chinese Academy of Sciences
Journal of Materials Chemistry A
20507488 (ISSN) 20507496 (eISSN)
Vol. 5 24 12400-12406Subject Categories (SSIF 2011)
Materials Chemistry
DOI
10.1039/c7ta02891a