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https://doi.org/10.3938/NPSM.68.308
Optical Properties of CsPbX$_3$ (X = Br, I) Quantum Dots
New Phys.: Sae Mulli 2018; 68: 308~311
Published online March 30, 2018;  https://doi.org/10.3938/NPSM.68.308
© 2018 New Physics: Sae Mulli.

Hayeon WON, Do Hyung KIM*

Nano Applied Physics Laboratory (NAPL), Department of Physics, Kyungpook National University, Daegu 41566, Korea
Correspondence to: kimdh@knu.ac.kr
Received December 15, 2017; Revised January 9, 2018; Accepted January 10, 2018.
cc This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
In order to investigate the photoluminescence (PL) and the X-ray excited luminescence (XEL) characteristics of CsPbBr$_3$ and CsPbI$_3$ quantum dots with high effective mass ($Z_{eff}$), we synthesized CsPbBr$_3$ and CsPbI$_3$ quantum dots with a cubic phase by using the wet chemical method. The CsPbBr$_3$ quantum dots had a PL peak at 522 nm and an XEL peak at 537 nm. The CsPbI$_3$ quantum dots had a PL peak at 690 nm and an XEL peak at 711 nm. The high XEL peaks could be attributed to the high $Z_{eff}$ of the CsPbBr$_3$ and the CsPbI$_3$ quantum dots (62.24 and 64.04, respectively). The high $Z_{eff}$ might have led to the high stopping power for X-ray detection. These results show the potential of CsPbBr$_3$ and CsPbI$_3$ quantum dots for applications in the field of optical and X-ray detection.
PACS numbers: 78.67.Hc, 78.67.Bf
Keywords: CsPbBr$_3$, CsPbI$_3$, Photoluminescence, X-ray emitted luminescence


July 2018, 68 (7)
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