Carbidonitride- and oxycarbidonitride-based phosphors for LED lighting devices

Li, Yuanqiang; Dennis, Romanelli, Michael; Tian, Yongchi

doi:10.1117/12.906847

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Thermal Stability Of Luminescence Emission1

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2014

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“…In searching for host crystals with attractive ΔR, crystalline solids with high hardness were screened for use as phosphor hosts [44]. The hardness and thermal expansion data of several phosphor host related crystals are listed in Table 1.…”

Section: Thermal Stability Of Luminescence Emissionmentioning

confidence: 99%

Development of phosphors with high thermal stability and efficiency for phosphor-converted LEDs

Tian

2014

J Sol State Light

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This article briefly reviews the developments of the phosphors with high thermal stability and high efficiency for use in phosphor-converted LED (pcLED) packages by Lightscape Materials Inc. (wholly owned by The Dow Chemical Company). The current industry design objectives for pcLED packages are first outlined with emphasis on the emission spectral features required for target brightness and color characteristics for general illumination and back light unit for liquid crystal displays. There is a growing demand on thermal stability of the phosphor emission as the LED package power increases. A phenomenological analysis is described on luminescence loss and its relation to thermal stability of luminescence emission at elevated temperatures, which serves as an empirical guide in the search for new phosphor materials of high thermal stability. Finally, the formulations and luminescence properties of the proprietary carbidonitride and oxycarbidonitride phosphors are discussed.

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Section: Thermal Stability Of Luminescence Emissionmentioning

confidence: 99%