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.
Power Conversion Efficiency
11-Percent Efficiency
Fullerene
Nonfullerene Acceptors
Ir Sensitization
Chains
Energy-Transfer
Small-Molecule
Author
W. F. Shen
Qingdao University
Chinese Academy of Sciences
W. Chen
Qingdao University
Chinese Academy of Sciences
D. Q. Zhu
Chinese Academy of Sciences
J. D. Zhang
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
Materials Chemistry
DOI
10.1039/c7ta02891a