Negative thermal quenching of below-bandgap photoluminescence in InPBi
Journal article, 2017
This paper reports a temperature-dependent (10-280 K) photoluminescence (PL) study of below-bandgap electron-hole recombinations and anomalous negative thermal quenching of PL intensity in InP1- xBix (x = 0.019 and 0.023). Four PL features are well resolved by curve-fitting of the PL spectra, of which the energies exhibit different temperature dependence. The integral intensities of the two high-energy features diminish monotonically as temperature rises up, while those of the two low-energy features decrease below but increase anomalously above 180 K. A phenomenological model is established that the residual electrons in the final state of the PL transition transfer into nonradiative state via thermal hopping, and the thermal hopping produces in parallel holes in the final state and hence enhances the radiative recombination significantly. A reasonable interpretation of the PL processes in InPBi is achieved, and the activation energies of the PL quenching and thermal hopping are deduced. © 2017 Author(s).
Author
X Chen
Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences
Shanghai Institute of Technical Physics Chinese Academy of Sciences
Xiaoyan Wu
Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences
Li Yue
Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences
Liangqing Zhu
Shanghai Institute of Technical Physics Chinese Academy of Sciences
East China Normal University
Wenwu Pan
Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences
Zhen Qi
Shanghai Institute of Technical Physics Chinese Academy of Sciences
Shu Min Wang
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Jun Shao
Shanghai Institute of Technical Physics Chinese Academy of Sciences
Applied Physics Letters
0003-6951 (ISSN) 1077-3118 (eISSN)
Vol. 110 5 051903Subject Categories (SSIF 2011)
Atom and Molecular Physics and Optics
Condensed Matter Physics
DOI
10.1063/1.4975586