Author(s): Chen, YN (Chen, Yanan); Jin, P (Jin, Peng); Zhou, GD (Zhou, Guangdi); Feng, MY (Feng, Mengyang); Fu, FB (Fu, Fangbin); Wu, J (Wu, Ju); Wu, ZG (Wu, Zhangu)

Source: JOURNAL OF LUMINESCENCE Volume: 226 Article Number: 117428 DOI: 10.1016/j.jlumin.2020.117428 Published: OCT 2020

Abstract: Temperature-dependent cathodoluminescence (CL) measurements were performed for homoepitaxial chemical vapor deposited (CVD) diamond from 10 K to room temperature. With the increment of temperature, the unusual phenomena that the integrated intensities of free-exciton emission initially rise and then decrease, have been observed. The model based on trapping and thermal release of excitons was applied on the explanation of the unusual phenomena, and the binding energy of shallow traps in diamond at low temperatures has been obtained from the fitting experimental data. Besides, the broadening of the full width at half maximums (FWHMs) has been discussed. The exciton-phonon interactions at higher temperatures lead to the broadening of the width of the free-exciton emission.

Accession Number: WOS:000559072300008

ISSN: 0022-2313

eISSN: 1872-7883

Full Text: https://www.sciencedirect.com/science/article/pii/S0022231319320897?via%3Dihub