Abstract
Morphology is a critical factor to determine the photovoltaic performance
of organic solar cells (OSCs). However, delicately fine-tuning the morphology involving only small molecules is an extremely challenging task.
Herein, a simple, generic, and effective concentration-induced morphology
manipulation approach is demonstrated to prompt both the state-of-theart thin-film BTR-Cl:Y6 and thick-film BTR:PC71BM all-small-molecule
(ASM) OSCs to a record level. The morphology is delicately controlled by
subtly altering the prepared solution concentration but maintaining the
identical active layer thickness. The remarkable performance enhancement achieved by this approach mainly results from the enhanced
absorption, reduced trap-assistant recombination, increased crystallinity,
and optimized phase-separated network. These findings demonstrate that
a concentration-induced morphology manipulation strategy can further
propel the reported best-performing ASM OSCs to a brand-new level, and
provide a promising way to delicately control the morphology towards
high-performance ASM OSCs.
of organic solar cells (OSCs). However, delicately fine-tuning the morphology involving only small molecules is an extremely challenging task.
Herein, a simple, generic, and effective concentration-induced morphology
manipulation approach is demonstrated to prompt both the state-of-theart thin-film BTR-Cl:Y6 and thick-film BTR:PC71BM all-small-molecule
(ASM) OSCs to a record level. The morphology is delicately controlled by
subtly altering the prepared solution concentration but maintaining the
identical active layer thickness. The remarkable performance enhancement achieved by this approach mainly results from the enhanced
absorption, reduced trap-assistant recombination, increased crystallinity,
and optimized phase-separated network. These findings demonstrate that
a concentration-induced morphology manipulation strategy can further
propel the reported best-performing ASM OSCs to a brand-new level, and
provide a promising way to delicately control the morphology towards
high-performance ASM OSCs.
| Original language | English |
|---|---|
| Article number | 2001076 |
| Number of pages | 9 |
| Journal | Advanced Energy Materials |
| Volume | 10 |
| Issue number | 27 |
| DOIs | |
| Publication status | Published - 1 Jul 2020 |
Keywords
- all-small-molecule
- high-performance
- morphology control
- organic solar cells
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science
