Speaker: Ms. Sanchari Debnath
Research Supervisor: Prof. Satish Patil
Topic: Organic Lasers
Date & Time: Thursday, 3rd November 2022 at 4:00 PM
Venue: SSCU Auditorium (Old Building)
Lasers provide light with unique and extremely useful properties, including high intensity, directionality, monochromatic emission, and large coherence length.1Organicmaterials exhibit promising prospects as gain medium in lasers due to the inherent merits of abundant excited-state process with large stimulated emission cross-section, tunable emission wavelength, and good solution processability.2All the organic lasers reported to date have been pumped optically but lasing under electrical pumping is the ultimate goal, which remains a challenge.3The formation of long-lived triplet states is one of the key issues faced by electrically pumped organic lasers.4
In this seminar, I will explain the detailed mechanism of organic lasers. Subsequently, I will discuss the challenges associated with electrically pumped organic lasers.5Further,I will concisely describe how triplet-state engineering in organic lasers via triplet-triplet annihilation, phosphorescence, thermally activated delayed fluorescence, etc., could resolve the problem of excess triplet-state accumulation.6
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