Melt blending crystallization regulating balanced nanodomains in efficient and scalable coating processed organic solar cells.
Sci Bull (Beijing)
; 68(11): 1153-1161, 2023 Jun 15.
Article
in En
| MEDLINE
| ID: mdl-37211491
ABSTRACT
The miscibility between active layer donors (D) and acceptors (A) is a key factor impeding the development of organic photovoltaics (OPVs) toward higher performance and large-area production. In this study, melt blending crystallization (MBC) was used to accomplish molecular-level blending and highly oriented crystallization in bulk heterojunction (BHJ) films realized by a scalable blade coating process, which increased the D/A contact area and provided sufficient exciton diffusion and dissociation. At the same time, the highly organized and balanced crystalline nanodomain structures permitted dissociated carriers to be efficiently transmitted and collected, resulting in significantly enhanced short-circuit current density, fill factor, and efficiency of the device by means of optimum melting temperature and quenching rates. The method can be simply incorporated into current efficient OPV material systems and achieve a device performance comparable to the best values. The blade-coating-processed PM6/IT-4F MBC devices achieved an efficiency of 13.86% in a small-area device and 11.48% in a large-area device. A power conversion efficiency (PCE) of 17.17% was obtained in PM6BTP-BO-4F devices, and a PCE of 16.14% was acquired in PM6Y6 devices.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Tissue Donors
/
Motion Pictures
Limits:
Humans
Language:
En
Journal:
Sci Bull (Beijing)
Year:
2023
Document type:
Article
Affiliation country:
Publication country:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS