Asian Journal of Physics Vol. 34, Nos 1 & 2 (2025) 1-8

The effect of patterned quantum dot films on the optical properties of white LEDs studied by optical simulation and experiment

Jaehyeong Yoo, Seung Chan Hong, Sung Min Park, Sung-Yoon Joe, and Jae-Hyeon Ko†
School of Semiconductor-Display Technology, Nano Convergence Technology Center,
Hallym University, Chuncheon 24252, Gangwondo, Korea

Quantum dots (QDs) play a crucial role in display technology in terms of color purity. Due to their narrow emission spectrum, the color gamut of displays can be significantly enhanced. Additionally, QD materials can be utilized in general lighting to improve color rendering performance. In particular, red QDs can be integrated into remote components and applied to white LEDs to enhance their color rendering properties. In this study, we investigated the effect of patterned QD films on the optical characteristics of white LEDs through optical simulations and experiments. Initially, in the simulation, red QD particles were mixed with TiO2 nanoparticles in the diffuser plate placed above the white LED array. The simulation revealed that achieving high color rendering lighting with red QDs requires an appropriate mixture of TiO2 nanoparticles and QD particles. Consequently, a higher QD concentration was needed as the QD film area decreased. The experimental implementation of patterned QD films on the lighting device demonstrated that appropriate patterning enables high luminance while maintaining acceptable color rendering performance. Moreover, this approach can be employed to widely adjust the correlated color temperature of the white LED device. This study presents an innovative design strategy for realizing high-color-rendering white LEDs while reducing QD consumption and overall costs. © Anita Publications. All rights reserved.
Doi: XXX
Keywords: Quantum dot, LED, Lighting device, Color rendering.

Peer Review Information
Method: Single- anonymous; Screened for Plagiarism? Yes
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