Investigating underlying mechanism in spectral narrowing phenomenon induced by microcavity in organic light emitting diodes.

ABSTRACT: This paper reports our experimental studies on the underlying mechanism responsible for electroluminescence spectral narrowing phenomenon in the cavity-based organic light-emitting diodes. It is found that the microcavity generates an emerging phenomenon: a magneto-photoluminescence signal in Poly(9,9-dioctylfluorene-alt-benzothiadiazole) polymer under photoexcitation, which is completely absent when microcavity is not used. This provides an evidence that microcavity leads to the formation of spatially extended states, functioning as the intermediate states prior to the formation of Frenkel excitons in organic materials. This is confirmed by the magneto-electroluminescence solely observed from the cavity-based light-emitting diodes under electrical injection. Furthermore, the narrowed elec

SUBMITTER: Wang M 

PROVIDER: S-EPMC6453918 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature