Phosphor-converted laser-based solid-state lighting device in transmission mode using transparent conducting oxide substrate
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2025-02-07 |
| Journal | Physica Scripta |
| Authors | Aayushi Soni, Ravibabu Mulaveesala, Satish Kumar Dubey, Dalip Singh Mehta |
| Citations | 1 |
Abstract
Section titled āAbstractāAbstract Laser excitation of phosphorescent material (inorganic phosphor) to produce super-bright white light leads to thermal quenching. This article presents an innovative thermal heat reduction scheme that addresses the issue of phosphor heating. This study demonstrates a transparent conducting oxide film on a glass substrate under three conditions: low laser power with a heat sink, high laser power, and increased glass thickness. The characteristics of produced white light are examined in detail, and a electro-thermal equivalent circuit is devised. Indium-tin oxide (ITO) film mitigates thermal and color instability issues, along with the flickering of a light source in transmission mode. Owing to the elevated conductivity of ITO film, it functions as a heat sink, absorbing thermal energy from the phosphor (luminescent material). It disperses heat to the underlying glass substrate via diffusion and into the ambient air more effectively than a conventional glass substrate. It is more economical than utilizing diamond or sapphire substrate. This work is expected to boost the applications of transmissive laser lighting. Experimental results of laser-based solid-state lighting (LB-SSL) devices in transmission mode are presented utilizing ITO-coated glass (ITOG). We observed substantial heat conduction through ITOG and reduced thermal quenching of the photoluminescent spectrum compared to standard glass.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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