Random lasing in cesium lead bromine perovskite quantum dots film

  • Ting Fan
  • Jiantao LüEmail author
  • Yihong Chen
  • Wenxiong Yuan
  • Yongfa Huang


Cesium lead bromine (CsPbBr3) perovskite colloidal quantum dots were prepared by hot injection method. The obtained samples were single crystal nanocubes with the average side length of 9–10 nm. The drop-casting film of the quantum dots showed obvious green stimulated emission under 400 nm femtosecond laser pumping with the full width at half maximum of about 4 nm. The laser threshold was derived to be about 471 µJ/cm2. The laser behavior of CsPbBr3 quantum dots films could be attributed to random lasing modes which realized in weak scattering regimes.



This work is supported by the National Natural Science Foundation of China (No. 51702051), Natural Science Foundation of Guangdong province (Grant No. 2017A030313307) and Education Department Foundation of Guangdong province (No. 2016KTSCX151).

Supplementary material

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Supplementary material 1 (DOCX 14 KB)


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Authors and Affiliations

  1. 1.School of Materials Science and Energy EngineeringFoshan UniversityFoshanChina
  2. 2.School of Physics and Optoelectronic EngineeringFoshan UniversityFoshanChina

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