Research progress of the blue area of inorganic thin film electroluminescent material
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摘要: 介绍了蓝区无机薄膜电致发光材料的应用、电致发光器件的发光原理及结构类型，综述了蓝区无机薄膜电致发光材料的种类及其各自存在的问题，重点概述了已实用化的蓝区无机电致发光材料GaN的研究及应用现状。由于目前多数蓝光芯片核心技术被少数国外公司垄断，我国所掌握的技术离世界先进水平仍有相当大的差距，因此迫切需要国内能够加大对蓝区电致发光材料的研发。Abstract: This paper mainly introduces the application of the blue electroluminescent material, the principle and structure of the electroluminescent device. Blue light-emitting inorganic thin film electroluminescent materials are reviewed and their respective problems are pointed out. The practical application of the GaN blue-light-emitting materials are mainly summarized. At present, most blue-chip core technology is occupied by a few foreign companies, there is still a considerable gap on our available technology from the world's advanced level. So there is an urgent need to increase research and development of the blue electroluminescent light emitting material.
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Key words:
- blue material /
- LED /
- TFEL /
- GaN
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图 1 无机薄膜电致发光机理示意图
Figure 1. Schematic diagram of thin film electroluminescent mechanism
图 7 硅衬底GaN基蓝光、绿光以及黄光LED光功率及外量子效率与工作电流关系
Figure 7. Relationship between EQE and working current for GaN based blue, green and yellow LED on silicon substrate
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