通过将电极尺寸减小到 ϕ2.2 μm 提高红色纳米柱 μ-LED 的发光效率

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2023-12-28 DOI:10.35848/1882-0786/ad10ec

Katsumi Kishino, Ai Mizuno, Tatsuya Honda, Jumpei Yamada and Rie Togashi

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引用次数: 0

摘要

基于 InGaN 的红色纳米柱微型 μLED 的发射直径为 ϕ2.2 μm，在峰值波长 615 nm 处的片上外部量子效率 (EQE) 达到 2.1%。通过在相同的纳米柱图案区域重复电极工艺，并将发射直径从 ϕ80 减小到 ϕ2.2 μm，制造出了这种 LED。当发射直径从 1.2% 减小到 2.1% 时，峰值 EQE 在 25 A cm-2 时达到最大值。这种行为不同于 InGaN 薄膜发光二极管，其特点是纳米柱发光二极管侧壁钝化的独立纳米发光二极管单元。

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Improving the luminous efficiency of red nanocolumn μ-LEDs by reducing electrode size to ϕ2.2 μm

A red InGaN-based nanocolumn micro μLED with an emission diameter of ϕ2.2 μm was demonstrated to achieve an on-wafer external quantum efficiency (EQE) of 2.1% at the peak wavelength of 615 nm. The LED was fabricated by repeating the electrode process on the same nanocolumn pattern area and reducing the emission diameter from ϕ80 to ϕ2.2 μm. The peak EQE, which was maximized at ∼25 A cm−2, increased by decreasing the emission diameter from 1.2% to 2.1%. This behavior, which differs from that of InGaN-film LEDs, is characterized as a unit of independent nano-LEDs with passivated sidewalls of nanocolumn LEDs.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).