Molecular Optimization on Polymer Acceptor Enables Efficient All-Polymer Solar Cell with High Open-Circuit Voltage of 1.10 V.
Macromol Rapid Commun
; 43(22): e2100925, 2022 Nov.
Article
en En
| MEDLINE
| ID: mdl-35170109
ABSTRACT
Currently, rational design of polymer acceptors is desirable but there is still a challenge to develop high-performance all-polymer solar cells (all-PSCs). In this work, brominated thienyl-fused malononitrile-based monomer is employed to copolymerize with indacenodithiophene (IDT) and benzodithiophene (BDT)-based linking units to develop two polymerized small molecule acceptors (PSMAs) PIDT and PBDT, respectively, for all-PSCs. The two PSMAs show similar absorption edges, while PBDT shows a slightly higher lowest unoccupied molecular orbital (LUMO) energy level than PIDT. Benefitted from the relatively high LUMO levels of the two polymer acceptors, notable open-circuit voltage (Voc ) values over 1.0 V are achieved when using them as acceptor to blend with PTQ10 as polymer donor. Particularly, the all-PSC based on PTQ10PIDT demonstrates a power conversion efficiency of 10.19%, with an outstanding Voc of 1.10 V benefitted from the higher LUMO energy level of PIDT acceptor. The results demonstrate a feasible strategy to design PSMAs by selecting appropriate linking units for increasing the Voc and improving the efficiency of all-PSCs.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Macromol Rapid Commun
Año:
2022
Tipo del documento:
Article
País de afiliación:
China