Mechanical Insights into Aggregation-Induced Delayed Fluorescence Materials with Anti-Kasha Behavior.

ABSTRACT: Organic materials with aggregation-induced delayed fluorescence (AIDF) have exhibited impressive merits for improving electroluminescence efficiency and decreasing efficiency roll-off of nondoped organic light-emitting diodes (OLEDs). However, the lack of comprehensive insights into the underlying mechanism may impede further development and application of AIDF materials. Herein, AIDF materials consisting of benzoyl serving as an electron acceptor, and phenoxazine and fluorene derivatives as electron donors are reported. They display greatly enhanced fluorescence with increased delayed component upon aggregate formation. Experimental and theoretical investigations reveal that this AIDF phenomenon can be rationally ascribed to the suppression of internal conversion and the promotion of inte

SUBMITTER: Guo J 

PROVIDER: S-EPMC6364497 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature