19 September 2018 Optical properties of white CdSe:Zn quantum dots
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Abstract
The white quantum dots (WQDs), which have both the surface state and band edge emission, have been pay more attention due to their broad emission spectrum. However, the low quantum yield (QY) and poor stability limits their application in solid-state lighting. In order to solving above problems, the QDs were prepared by colloidal chemistry method and adding Zn to form CdSe:Znx QDs. The result shows that the QY of as-prepared and Zn doped CdSe QD is 42 and 52 %. Moreover, the second emission peak shows red-shifted at low Zn content, and blue-shifted at 10 % of Zn content. In addition, Zncontaining samples also have a broad emission peak, and consists of two particle sizes. The QY can be maintained for 10 at% -Zn samples after 120 days aging at room temperature, meaning that the sample have good stability
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Chun-Ru Huang and Shu Ru Chung "Optical properties of white CdSe:Zn quantum dots", Proc. SPIE 10720, Nanophotonic Materials XV, 107200C (19 September 2018); doi: 10.1117/12.2320178; https://doi.org/10.1117/12.2320178
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