Room-temperature up-conversion random lasing from CsPbBr<sub>3</sub> quantum dots with TiO<sub>2</sub> nanotubes

Xiaosheng Tang; Yao Bian; Zhengzheng Liu; Zhengzheng Liu; Juan Du; Juan Du; Juan Du; Meng Li; Meng Li; Zhiping Hu; Jie Yang; Weiwei Chen; Lidong Sun; Lidong Sun

doi:10.1364/OL.44.004706

Optics Letters
Vol. 44,
Issue 19,
pp. 4706-4709
(2019)
•https://doi.org/10.1364/OL.44.004706

Room-temperature up-conversion random lasing from CsPbBr₃ quantum dots with TiO₂ nanotubes

Xiaosheng Tang, Yao Bian, Zhengzheng Liu, Juan Du, Meng Li, Zhiping Hu, Jie Yang, Weiwei Chen, and Lidong Sun

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Xiaosheng Tang, Yao Bian, Zhengzheng Liu, Juan Du, Meng Li, Zhiping Hu, Jie Yang, Weiwei Chen, and Lidong Sun, "Room-temperature up-conversion random lasing from CsPbBr₃ quantum dots with TiO₂ nanotubes," Opt. Lett. 44, 4706-4709 (2019)

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Abstract

We report successful room-temperature up-conversion random lasing by distributing ${CsPbBr}_{3}$ quantum dots (QDs) uniformly into ${TiO}_{2}$ nanotubes (NTs). In order to overcome the difficulty in purifying the QDs, ${TiO}_{2}$ NTs were designed to collect QDs and enhance the optical multiple scattering effect. A threshold of $9.54 mJ / {cm}^{2}$ and narrow full width at half-maximum of 0.49 nm with a relatively high quality factor of 1089 were successfully observed. These results indicate that ${CsPbBr}_{3}$ $QDs / {TiO}_{2}$ NTs can be high-performance up-conversion lasers for practical applications, especially when the phase matching required by conventional approaches cannot be fulfilled.

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Optics Letters