Mr. Tao Yang Profile

Tao Yang

at Fuzhou Univ.

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Proceedings Article | 1 November 2021 Paper

Light efficiency enhanced quantum dot color conversion layer based on a distributed Bragg reflector

Yuanyuan Ye, Sheng Xu, Enguo Chen, Yun Ye, Xinpei Hu, Lijuan Zhong, Junhu Cai, Chenhui Wang, Tao Yang

Proceedings Volume 12057, 120573I (2021) https://doi.org/10.1117/12.2606534

KEYWORDS: Quantum dots, Distributed Bragg reflectors, Transmittance, Optical filters, CIE 1931 color space

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In order to improve high efficiency for light-color conversion, this paper studies a high-efficiency light recycled structure for quantum dot color conversion (QDCC) based on a distributed Bragg reflector (DBR). The difference of optical performance is discussed between the QDCC structure employing a DBR and an absorptive color filter (ACF). Traditional quantum dot color conversion layer (QDCCL) has inherent limitations of blue light leakage and low light utilization rate. To solve this, an optical structure of QDCCL is proposed and discussed in detail, which uses a DBR instead of the traditional color filter and realizes efficient light-color conversion. Different structures are compared via experimental preparation and measurement, such as light-emitting intensity, color gamut, and light utilization rate. Results show that the structure of QDCCL combining a DBR can not only achieve a high color gamut of 124 NTSC%, but also increase the light utilization rate over twice than the traditional ACF structure. More importantly, the light emission intensity of red and green sub-pixels is increased by 2.2 and 2.3 times, respectively. In general, the structure proposed in this paper is of great significance to the development of the display industry.

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