Achieving high efficiency ultrapure violet OLEDs with a CIE _<i>y</i> coordinate of below 0.015 through precise manipulation of peripheral heavy atom sulfur.

ABSTRACT: The development of efficient pure violet organic light-emitting diodes (OLEDs) featuring a low Commission Internationale de l'Éclairage (CIE) _y coordinate of below 0.02 remains a critical yet challenging objective. Herein, three ultrapure violet hot-exciton emitters, namely BO-2DBT, BO-3DBT, and BO-4DBT, have been developed through strategic integration of an oxygen-bridged cyclized boron (BO) skeleton with a dibenzothiophene (DBT) at varied substitution positions, where the effect of the regioisomerism of heavy sulfur atom was investigated. All three emitters demonstrate narrowband violet emission in toluene solution, with maxima centered at 405, 408, and 404 nm, respectively, and narrow full widths at half-maximum (FWHM) of 23, 22, and 22 nm, respectively. Theoretical a

SUBMITTER: Chen R 

PROVIDER: S-EPMC12352618 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature