A promising approach for the development of effective full-color displays is to combine blue microLEDs (μLEDs) with color conversion layers. Perovskite nanocrystals (PNCs) are notable for their tolerance to defects and provide excellent photoluminescence quantum yields and high color purity compared to metal chalcogenide quantum dots. The stability of PNCs in ambient conditions and under exposure to blue light can be improved using a ${\mathrm{SiO}}_2$ coating. This study proposes a device that could be used for both display and visible light communication (VLC) applications. The semipolar blue μLED array fabricated in this study shows a negligible wavelength shift, indicating a significant reduction in the quantum confined Stark effect. Owing to its shorter carrier lifetime, the semipolar μLED array exhibits an impressive peak 3 dB bandwidth of 655 MHz and a data transmission rate of 1.2 Gb/s corresponding to an injection current of 200 mA. The PNC–μLED device assembled from a semipolar μLED array with PNCs demonstrates high color stability and wide color-gamut features, achieving 127.23% and 95.00% of the National Television Standards Committee standard and Rec. 2020 on the CIE 1931 color diagram, respectively. These results suggest that the proposed PNC–μLED device is suitable for both display-related and VLC applications.

中文翻译：

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使用半极性 μLED 和全无机封装钙钛矿纳米晶体的具有 VLC 应用潜力的高度稳定的全彩显示设备

开发有效全彩显示器的一种有前途的方法是将蓝色微型 LED (μLED) 与颜色转换层结合起来。与金属硫属化物量子点相比，钙钛矿纳米晶体 (PNC) 以其对缺陷的耐受性而著称，并提供出色的光致发光量子产率和高色纯度。PNCs 在环境条件下和暴露在蓝光下的稳定性可以通过使用${\mathrm{二氧化硅}}_2$涂层。这项研究提出了一种可用于显示和可见光通信 (VLC) 应用的设备。本研究中制造的半极性蓝色 μLED 阵列的波长偏移可以忽略不计，表明量子限制的斯塔克效应显着降低。由于其较短的载流子寿命，半极性 μLED 阵列表现出令人印象深刻的 655 MHz 峰值 3 dB 带宽和 1.2 Gb/s 的数据传输速率，对应于 200 mA 的注入电流。PNC-μLED 器件由带有 PNC 的半极性 μLED 阵列组装而成，具有高色彩稳定性和宽色域特性，达到国家电视标准委员会标准的 127.23% 和 95.00%。2020 分别在 CIE 1931 色图上。