微电流高效率650nm谐振腔发光二极管

Micro Current High Efficiency 650nm Resonant Cavity Light Emitting Diode

基于微腔理论和薄膜光学传输矩阵模型,设计并制备了孔径不同的谐振腔发光二极管.通过对外延结构的设计和对器件的制备与测试,详细研究了微腔结构、腔谱失谐以及有效辐射面积对器件发光效率、峰值波长和半波全宽等性能的影响,最终降低了器件的启亮电流并且提升了器件的外量子效率.制备的器件能够在100μA偏置电流下产生肉眼清晰可见的微瓦级光强,在1mA电流下达到0.16mW的光功率和7%的外量子效率.器件的峰值波长为650nm,并且在0.1~7mA范围内不随电流改变而发生变化.远场分布为均匀对称的圆形光斑,水平和竖直发散角分别为46°和48°.与普通发光二极管相比,该器件具有更高的发光效率和更好的单色性、方向性、波长稳定性,研究成果为实现微小电流驱动的高亮度发光器件提供了基础元件,并为谐振腔发光二极管在微电流下的光电特性研究提供参考与借鉴.

Based on the micro cavity theory and the film optical transmission matrix model,the resonant cavity light emitting diodes with different aperturehave been designed and fabricated.Through the design of epitaxial structure as well as the preparation and testing of devices,in this paper,the effects of microcavity structure,cavity spectrum detuning and effective radiation area on the luminous efficiency,peak wavelength and full width of the half wave were investigated in detail.In the end,the bright current of the device is reduced and the external quantum efficiency of the device is improved.The device can produce visible light intensity at the 100μA bias current.At 1 mA current,the power is 0.16 mW and the external quantum efficiency is 7%.The peak wavelength of the device is 650 nm,which had not changed with the current in the range of 0.1-7 mA.The far-field distribution is circular spot with uniform symmetry,and the horizontal and vertical divergence angles are 46°and 48°respectively.Compared with ordinary light emitting diode,the device has higher luminous efficiency and better monochromaticity,directivity,wavelength stability.This research has provided devices for realizing high current luminescent driven by micro current,and provided references for the research of the photoelectric characteristics of resonant cavity light emitting diodes under micro current.