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InGaN micro-LED array with integrated emission and detection functions for color detection application.

Lintao Yan, Zuxin Jin, Runze Lin

    Optics Letters
    |June 1, 2023
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a green Indium Gallium Nitride (InGaN) micro-light-emitting diode (LED) array capable of simultaneous light emission and color detection. The device demonstrates effective color and skin tone detection, even in darkness.

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    Area of Science:

    • Optoelectronics
    • Semiconductor devices
    • Materials science

    Background:

    • Indium Gallium Nitride (InGaN)-based micro-light-emitting diodes (LEDs) possess overlapping emission and absorption spectra.
    • This characteristic enables simultaneous optical signal detection and emission, facilitating color detection applications.

    Purpose of the Study:

    • To fabricate a green InGaN-based micro-LED array with integrated emission and detection functionalities.
    • To evaluate the device's performance in color and skin color detection.

    Main Methods:

    • Fabrication of a green InGaN-based micro-LED array with integrated emission and detection capabilities.
    • Utilized an 80 μm micro-LED for light emission and a 200 μm LED on the back side for detecting reflected light.
    • Optimized the spacing between micro-LEDs to 1 mm to minimize direct light transmission effects.

    Main Results:

    • The integrated device successfully performed color detection using reflected light.
    • Demonstrated good detection performance for various colors and skin tones.
    • Effective detection was achieved even in a dark environment.
    • The device can emit light from both top and bottom sides.

    Conclusions:

    • The developed InGaN micro-LED array effectively integrates emission and color detection functions.
    • The dual-sided light emission capability opens possibilities for applications in displays, communication, and sensing.
    • Optimized device design enhances detection accuracy by reducing unwanted light interference.