Effects of Different Package Structures on Thermal Properties of High Power White LED

Abstract

The characteristics of several package structures of high power white Light emitting diode (LED) are described in this paper. The influence of different structures on thermal properties is analyzed. Forward voltage method is used to test the thermal resistance of LED chips.

Stability Enhancement in All‐Inorganic Perovskite Light Emitting Diodes via Dual Encapsulation

“…[8][9][10][11] Furthermore, exposure to environmental humidity can lead to partial decomposition of these NCs, negatively impacting fluorescence quality. [12,13] In optoelectronic devices, prolonged high-power operation generates high surface temperatures, [14][15][16][17] adversely affecting the optical characteristics of internal fluorescent materials. Therefore, enhancing the thermal stability of CsPbX 3 NCs is a critical and increasingly researched area in the field.…”

Studies on the optical stability of CsPbBr3 with different dimensions (0D, 1D, 2D, 3D) under thermal environments

“…6,7 Especially, the optical stability of CsPbBr 3 under thermal environment has been most important, which mainly stemmed from the fact that optoelectronic devices inevitably generated high temperatures on the device surface during long-term energized conditions, thereby placing a high demand on the optical stability of CsPbBr 3 . [8][9][10][11][12] However, the soft matter structure of CsPbBr 3 enables them to exhibit a strong response to small perturbations of the external thermal environment, 13 which would be highly unfavorable to the development of perovskite optoelectronic devices; thus, it is urgent to systematically investigate the optical stability of CsPbBr 3 under thermal environments.…”

Stable CsPbBr3 Nanocrystals Embedded in SiO2 for Backlight Display Applications

“…In terms of stability, all inorganic perovskite (CsPbX 3 , X = Cl, Br, I) NCs are far inferior to ceramic phosphors, attributed to their inherent moisture/heat/light sensitive ionic structures . Moreover, the backlight display device inevitably generates heat during the long-term power-on operation, − and the poor photothermal stability of CsPbX 3 NCs severely interferes with its efficient fluorescence emission . Therefore, only improving the photothermal stability of CsPbX 3 nanomaterials may make them one of the most promising down-conversion materials for backlight displays. − …”