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Open AccessArticle

The Photothermal Stability Study of Quantum Dots Embedded in Sodium Chlorides

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Institute of Photonic System, National Chiao-Tung University, No. 301, Gaofa 3rd Rd, Guiren Dist., Tainan 71150, Taiwan
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Institute of Electro-Optical Engineering, National Chiao Tung University, No. 1001, Daxue Rd., East Dist., Hsinchu 30010, Taiwan
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Department of Materials Science and Engineering, National Tsing Hua University No. 101, Sec. 2, Guangfu Rd., East Dist., Hsinchu 30013, Taiwan
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Institute of Lighting and Energy Photonics, National Chiao-Tung University No. 301, Gaofa 3rd Rd, Guiren Dist., Tainan 71150, Taiwan
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Imaging and Biomedical Photonics, National Chiao-Tung University No. 301, Gaofa 3rd Rd, Guiren Dist., Tainan 71150, Taiwan
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(1), 2; https://doi.org/10.3390/cryst10010002
Received: 5 November 2019 / Revised: 29 November 2019 / Accepted: 10 December 2019 / Published: 18 December 2019
(This article belongs to the Special Issue GaN-Based Optoelectronic Materials and Light Emitting Devices)
An efficient and useful method for the incorporation of colloidal quantum dots (QDs) into ionic matrices is demonstrated. We prepared three different synthesis methods, which are traditional saturated-salt water, methanol-assisted, and ethanol-assisted methods. The continuous thermal and photonic stress tests indicate that the high temperature, instead of photonic excitation stress, is more detrimental to the illumination capability of the quantum dots. While the traditional saturated-salt water synthesis and methanol-assisted method are quite effective in low temperature and low photon excitation intensity, the quantum dots sealed by the ethanol-assisted method cannot hold under all conditions. An over-1000-h aging test can provide crucial information for the longevity of these quantum dots, and more than 10,000 h of lifetime can be expected. View Full-Text
Keywords: quantum-well; -wire and -dot devices; light-emitting diodes; nanomaterials quantum-well; -wire and -dot devices; light-emitting diodes; nanomaterials
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Huang, Y.-M.; Hsu, S.-C.; Li, N.; Yu, C.-P.; Ke, L.-A.; Huang, C.-P.; Chang, S.-H.; Chueh, Y.-L.; Kuo, H.-C.; Lin, C.-C. The Photothermal Stability Study of Quantum Dots Embedded in Sodium Chlorides. Crystals 2020, 10, 2.

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