High-performance ternary polymer solar cells from a structurally similar polymer alloy
Artikel i vetenskaplig tidskrift, 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

Författare

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

Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

H. X. Jiang

Chinese Academy of Sciences

T. Wang

Chinese Academy of Sciences

Ergang Wang

Kemi och kemiteknik, Tillämpad kemi, Polymerteknologi

R. Q. Yang

Chinese Academy of Sciences

Journal of Materials Chemistry A

2050-7488 (ISSN)

Vol. 5 12400-12406

Ämneskategorier

Materialkemi

DOI

10.1039/c7ta02891a