Giant Small-Molecule Donors With Controlled Backbone Planarity Afford High-Performance and Photostable Organic Solar Cells.

ABSTRACT: High power conversion efficiency (PCE) and long-term stability are critical requirements for the commercialization of organic solar cells (OSCs). Small-molecule donors (SMDs) are promising due to easy purification and excellent batch-to-batch reproducibility, but they suffer from poor morphological stability associated with their fast diffusion kinetics. Here, new giant small-molecule donors (GSMDs) are designed that combine increased molecular sizes with excellent optoelectronic properties, enabling both efficient and photostable OSCs. To optimize their thermal and electrical properties, we tune the backbone planarity of GSMDs by controlling the orientation of alkyl side chains. Specifically, two GSMDs with different molecular configurations are synthesized: 1) GSMD-syn, where alkyl side

SUBMITTER: Jeon H 

PROVIDER: S-EPMC12866850 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature