A ternary organic solar cell with 15.6% efficiency containing a new DPP-based acceptor. Issue 45 (29th July 2021)

• Record Type: Journal Article
• Authors: Privado, María; Dahiya, Hemraj; de la Cruz, Pilar; Keshtov, Mukhamed L.; Langa, Fernando; Sharma, Ganesh D.
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 45(2021)
• Page Start: 16272
• Page End: 16281
• Publication Date: 2021-07-29
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1tc02241e
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A new non-fullerene small molecule (MPU6 ) containing thienylethynylselenophene bridges, has been studied as an acceptor along with PC71 BM and TDTBTA as a donor in ternary solution-processed bulk heterojunction polymer solar cells, showing a PCE of 15.60%. Abstract : A new non-fullerene small molecule acceptor (MPU6 ) containing a diketopyrrolopyrrole (DPP) acceptor unit as the core, connected to dicyanomethylene-3-ethylrhodanine end-capped units via thienylethynylselenophene bridges, has been designed and synthesized and its optical and electrochemical properties have been examined. MPU6 has been used as an acceptor along with a wide bandgap polymer (TDTBTA ) as the donor for solution-processed bulk heterojunction polymer solar cells, thus resulting in a power conversion efficiency (PCE) of 13.14%, which is higher than that obtained when PC71 BM is used as the acceptor (6.69%). The increase in PCE for the MPU6 -based polymer solar cell is due to the increase in both V OC and J SC, while the FF is lower than that for PC71 BM. In addition, PC71 BM has been used as a second acceptor to form ternary PSCs, thus achieving a PCE of 15.60%, which is significantly higher than those for the binary counterparts. The increase in PCE for ternary PSCs may be linked to better charge transport and energy transfer, which leads to better utilization of excitons and also leads to the enhancement of J SC and FF.