Engineering and Technology

Transparent near-infrared perovskite light-emitting diodes

C. Xie, X. Zhao, et al.

This groundbreaking research reports on the development of a transparent perovskite light-emitting diode (LED) that emits near-infrared light, perfect for enhancing mobile and wearable devices without sacrificing display space. Conducted by Chenchao Xie, Xiaofei Zhao, Evon Woan Yuann Ong, and Zhi-Kuang Tan from the National University of Singapore, this innovation showcases over 55% average transmittance in the visible spectrum.

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Abstract

This paper reports the development of a transparent perovskite light-emitting diode (LED) that emits near-infrared (NIR) light and can be overlaid on color displays for efficient, high-intensity NIR illumination in mobile and wearable devices. The device, with an ITO/AZO/PEIE/FAPbI3/poly-TPD/MoO3/Al/ITO/Ag/ITO architecture, achieves over 55% average transmittance in the visible spectrum, emits at 799 nm with a 5.7% total external quantum efficiency, and has a large functional area (120 mm²). This efficient, transparent NIR LED enables advanced security and sensing features in smart devices without sacrificing display space.

Publisher

Nature Communications

Published On

Aug 24, 2020

Authors

Chenchao Xie, Xiaofei Zhao, Evon Woan Yuann Ong, Zhi-Kuang Tan

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