Achieving Matrix Quantum Dot Light-Emitting Display Based on All-Inorganic CsPbBr₃ Perovskite Nanocrystal Composites

• Main Authors: Ching-Ho Tien, Ni-Pin Yeh, Kuan-Lin Lee, Lung-Chien Chen
• Format: Article
• Language: English
• Published: IEEE 2021-01-01
• Series: IEEE Access
• Subjects: Optoelectronic devices; light emitting diodes; quantum dots; perovskite; CsPbBr₃
• Online Access: https://ieeexplore.ieee.org/document/9539203/

We present a display consisting of a 64-cell quantum dot (QD) light-emitting diodes (LEDs) array manufactured by spin coating and steel plate design evaporation technology. The QDLED pixels in the array can be driven independently. The surface of perovskite nanocrystal (NC) composite was modified by using pure natural material aloe-vera gel as the organic precursor to obtain high-quality narrow band photoluminescence emission all-inorganic CsPbBr₃ perovskite NC composites. Here, an open-source Arduino microcontroller unit was used as the dynamic micro-control terminal, combined with a step-down module and four motor drive modules to make the display driver circuit. Finally, a 99&#x0025; operating rate and a maximum brightness of 3366 cd <inline-formula> <tex-math notation="LaTeX">$\text{m}^{-2}$ </tex-math></inline-formula> were achieved in the 8 <inline-formula> <tex-math notation="LaTeX">$\times $ </tex-math></inline-formula> 8 perovskite QDLEDs array display. Furthermore, an electroluminescence dynamic pattern display based on a 64-cell QDLEDs array display has been successfully demonstrated. This study demonstrates the potential of perovskite devices for next-generation displays.