Issue 31, 2020

Melt-grown large-sized Cs2TeI6 crystals for X-ray detection

Abstract

Herein, we report the details of the synthesis and crystal growth of a lead-free perovskite derivative Cs2TeI6 crystal, which reveals long-term environmental stability. The synthesis process is optimized to obtain pure Cs2TeI6 polycrystals, and to eliminate the formation of residual CsI resulting from high vapor pressure. Subsequently, the Cs2TeI6 single crystal with dimensions of Φ10 mm × 55 mm is grown by the vertical Bridgman method. The as-grown 0-D structural Cs2TeI6 crystal exhibits a high resistivity of 9.92 × 1011 Ω cm, and resulting mobilities of 4.03 ± 0.33 cm2 V−1 s−1 and 9.40 ± 0.45 cm2 V−1 s−1 for electrons and holes, respectively. The Au/Cs2TeI6/Au device shows a good response for optoelectronic and X-ray detection, with a relatively high X-ray sensitivity of 27.8 μC Gy−1 cm−2 and a low detection limit of 72.5 nGy s−1.

Graphical abstract: Melt-grown large-sized Cs2TeI6 crystals for X-ray detection

Supplementary files

Article information

Article type
Paper
Submitted
16 Jun 2020
Accepted
06 Jul 2020
First published
06 Jul 2020

CrystEngComm, 2020,22, 5130-5136

Melt-grown large-sized Cs2TeI6 crystals for X-ray detection

B. Xiao, F. Wang, M. Xu, X. Liu, Q. Sun, B. Zhang, W. Jie, P. Sellin and Y. Xu, CrystEngComm, 2020, 22, 5130 DOI: 10.1039/D0CE00868K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements