Organic Laser Dyes: Deep‐Red Lasing and Amplified Spontaneous Emission from Nature Inspired Bay‐Annulated Indigo Derivatives (Advanced Optical Materials 2/2020)

Abstract

Evan G. Moore, Ebinazar B. Namdas, Shih‐Chun Lo and co‐workers (article number 1901350) discover a new class of solution processable organic semiconductor laser dyes with deep‐red emission. These dyes exhibit high photoluminescence quantum yields and low amplified spontaneous emission (ASE) thresholds. Their use of a mixed host of 1,3‐bis(N‐carbazolyl)benzene (mCP) and 2‐hydroxyphenylbenzothiazole (HBT) not only leads to efficient cascade energy transfer, but significantly enhances the photostability of the films thanks to much lower heat dissipation in the chromophores.