학술논문
Study of the Electron-Phonon Coupling in PbS/MnTe Quantum Dots Based on Temperature-Dependent Photoluminescence.
Document Type
Academic Journal
Author
Halim ND; Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia.; Zaini MS; Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia.; Talib ZA; Department of Physics, College of Natural Sciences, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si 54896, Jeollabuk-do, Korea.; Liew JYC; Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia.; Institute of Advanced Technology, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia.; Kamarudin MA; Department of Physics, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Selangor Darul Ehsan, Malaysia.
Source
Publisher: MDPI Country of Publication: Switzerland NLM ID: 101640903 Publication Model: Electronic Cited Medium: Print ISSN: 2072-666X (Print) Linking ISSN: 2072666X NLM ISO Abbreviation: Micromachines (Basel) Subsets: PubMed not MEDLINE
Subject
Language
English
ISSN
2072-666X
Abstract
The temperature dependence of photoluminescence (PL) emission is a valuable tool for investigating carrier localization, recombination, and carrier-phonon interactions. Herein, electron-phonon couplings in lead sulfide (PbS) quantum dots (QDs) and lead sulfide/manganese tellurite (PbS/MnTe) QDs is reported. The effect of temperature on the PL emission of PbS and PbS/MnTe was explored within a temperature range of 10 to 300 K. When temperature increased, PL emission was blue-shifted due to the confinement effect. The gradual broadening of the full width at half maximum (FWHM) with increasing temperature indicates electron-phonon interactions. An analysis based on the Boson model revealed that the values of the exciton acoustic phonon coupling coefficient, σ, and temperature-dependent linewidth, γ, for PbS/MnTe were larger than those for PbS, indicating stronger exciton longitudinal-optical-phonon coupling in the compound structure.