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Foundations of White Light Quantum Dots

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Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications

Abstract

White light by the combination of blue light-emitting diode (LED) and yellow phosphors is a relatively simple manufacturing process. However, it cannot be avoided the problem of reduced efficiency caused by scattering due to the large size of phosphors. In order to improve the color rendering index (CRI) of device, mixing various phosphors to meet the requirement is the main trends. However, the mixing ratio and decay rates between different phosphors will affect the device performance. Even using semiconductor nanocrystals (NCs, also called quantum dots, QDs) as nanophosphor, the same problems still exist, especially when they are applicated in lighting. If we can prepare white light quantum dot (W-QD) with high quantum yield (QY), the above problem can be overcome. Therefore, how to design synthesis process to obtain high quality of W-QDs with both band-edge and surface-state emission is the key issue. In this chapter, I describe the fundamental mechanism and preparation method of W-QDs. Some challenges for the application of W-QDs, especially in solid-state lighting and backlight, are also discussed.

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Authors and Affiliations

  1. Energy Materials and Devices Laboratory, Materials Science and Engineering, National Formosa University, Yunlin, 63201, Taiwan, ROC

    Shu-Ru Chung

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  1. Shu-Ru Chung
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Correspondence to Shu-Ru Chung .

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  1. Department of Chemistry, National Taiwan University Department of Chemistry, Taipei, Taiwan

    Ru-Shi Liu

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Chung, SR. (2016). Foundations of White Light Quantum Dots. In: Liu, RS. (eds) Phosphors, Up Conversion Nano Particles, Quantum Dots and Their Applications. Springer, Singapore. https://doi.org/10.1007/978-981-10-1590-8_14

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