High Al content in n-AlGaInP window layer enhances the efficiency of red micro-LEDs

IF 4.6 2区物理与天体物理 Q1 OPTICS

Optics and Laser Technology Pub Date : 2025-04-05 DOI:10.1016/j.optlastec.2025.112876

Zhicheng Lu , Wenjie He , Minhua Li , Xi Zheng , Yurong Dai , Zhiyong Li , Yijun Lu , Zhong Chen , Weijie Guo

引用次数: 0

Abstract

The low quantum efficiency of AlGaInP-based red micro-LEDs has hindered the commercialization of full-color micro-LED displays. By modifying the Al content in the n-(Al_xGa_1-x)_0.5In_0.5P window layer from 30% to 60%, the maximum external quantum efficiency (EQE) of AlGaInP-based red micro-LEDs with a size of 18 μm improves from 11.9% to 13.9% mainly originating from the enhancement in light extraction efficiency (LEE). At 150 A/cm², the light output power (LOP) of red micro-LEDs with 60%-Al window layer is approximately 1.47 times that of red micro-LEDs with 30%-Al window layer. Furthermore, the characteristic temperature of red micro-LEDs with 60%-Al window layer has also been improved, alleviating efficiency degradation at high temperatures.

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来源期刊

Optics and Laser Technology 物理-光学

CiteScore

8.50

自引率

10.00%

发文量

1060

审稿时长

3.4 months

期刊介绍： Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication. The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas: •development in all types of lasers •developments in optoelectronic devices and photonics •developments in new photonics and optical concepts •developments in conventional optics, optical instruments and components •techniques of optical metrology, including interferometry and optical fibre sensors •LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow •applications of lasers to materials processing, optical NDT display (including holography) and optical communication •research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume) •developments in optical computing and optical information processing •developments in new optical materials •developments in new optical characterization methods and techniques •developments in quantum optics •developments in light assisted micro and nanofabrication methods and techniques •developments in nanophotonics and biophotonics •developments in imaging processing and systems