Recent Advances on GaN-Based Micro-LEDs

Zhang, Youwei; Xu, Ruiqiang; Kang, Qiushi; Zhang, Xiaoli; Zhang, Zihui

doi:10.20944/preprints202304.0764.v1

2023

DOI: 10.20944/preprints202304.0764.v1

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Recent Advances on GaN-Based Micro-LEDs

Youwei Zhang¹,

Ruiqiang Xu²,

Qiushi Kang³

et al.

Abstract: GaN-based micro-size light-emitting diodes (µLEDs) have a number of appealing and distinctive benefits for display, visible-light communication (VLC), and other novel applications. The smaller size of LEDs affords them the benefits of enhanced current expansion, less self-heating effects, and higher current density bearing capacity. Low external quantum efficiency (EQE) resulting from non-radiative recombination and quantum confined stark effect (QCSE) is the serious barrier for applications of &… Show more

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Cited by 2 publications

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Progress of Organic/Inorganic Luminescent Materials for Optical Wireless Communication Systems

2023

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The growing demand for faster data transference and communication allowed the development of faster and more efficient communication network-based technologies, with wider bandwidth capability, high resilience to electromagnetic radiation, and low latency for information travelling. To provide a suitable alternative to satisfy data transmission and consumption demand, wireless systems were established after a decade of studies on this topic. More recently, visible light communication (VLC) processes were incorporated as interesting wireless approaches that make use of a wide frequency communication spectrum to reach higher bandwidth values and accelerate the speed of data/information transmission. For this aim, light converters, such as phosphor materials, are reported to efficiently convert blue light into green, yellow, and red emissions; however, long carrier lifetimes are achieved to enlarge the frequency bandwidth, thereby delaying the data transference rate. In this review, we focused on recent advances using different luminescent materials based on prominent polymers, organic molecules, and semiconductor nanocrystals with improved photophysical properties and favored carrier recombination dynamics, which are suitable to enhance the VLC process. Here, the main features of the above materials are highlighted, providing a perspective on the use of luminescent systems for efficient optical communication applications.

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Progress of Organic/Inorganic Luminescent Materials for Optical Wireless Communication Systems

2023

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Microscale Lateral Perovskite Light Emitting Diode Realized by Self-Doping Phenomenon

Gao,

Huang,

Wang

et al. 2024

Sensors

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High-definition near-eye display technology has extremely close sight distance, placing a higher demand on the size, performance, and array of light-emitting pixel devices. Based on the excellent photoelectric performance of metal halide perovskite materials, perovskite light-emitting diodes (PeLEDs) have high photoelectric conversion efficiency, adjustable emission spectra, and excellent charge transfer characteristics, demonstrating great prospects as next-generation light sources. Despite their potential, the solubility of perovskite in photoresist presents a hurdle for conventional micro/nano processing techniques, resulting in device sizes typically exceeding 50 μm. This limitation impedes the further downsizing of perovskite-based components. Herein, we propose a plane-structured PeLED device that can achieve microscale light-emitting diodes with a single pixel device size < 2 μm and a luminescence lifetime of approximately 3 s. This is accomplished by fabricating a patterned substrate and regulating ion distribution in the perovskite through self-doping effects to form a PN junction. This breakthrough overcomes the technical challenge of perovskite–photoresist incompatibility, which has hindered the development of perovskite materials in micro/nano optoelectronic devices. The strides made in this study open up promising avenues for the advancement of PeLEDs within the realm of micro/nano optoelectronic devices.

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Recent Advances on GaN-Based Micro-LEDs

Cited by 2 publications

References 93 publications

Progress of Organic/Inorganic Luminescent Materials for Optical Wireless Communication Systems

Progress of Organic/Inorganic Luminescent Materials for Optical Wireless Communication Systems

Microscale Lateral Perovskite Light Emitting Diode Realized by Self-Doping Phenomenon

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