Thin films of CuSe2 nanoparticles embedded in selenium matrix were prepared by vacuum evaporation method on a glass substrate at room temperature. The optical properties of the films were investigated by photoluminescence spectroscopy (T = 20-300K) and UV-VIS spectroscopy (T = 300K). Surface morphology was investigated by scanning electron microscopy. The band gap for direct transition in CuSe2 was found to be in the range of 2.72-2.75 eV and that for indirect transition is in the range of 1.71-1.75 eV determined by UV-VIS spectroscopy. On the other hand, selenium exhibits direct band gap in the range of 2.33-2.36 eV. All estimated band gaps slightly decrease with the increase of the film thickness. Photoluminescence spectra of the thin films clearly show emission bands at about 1.63 and 2.32 eV at room temperature, with no shift observed with decreasing temperature. A model was proposed for explaining such anomaly.
Keywords:
thin films / spectroscopy / SEM / optical properties / chalcogenides
Source:
Processing and Application of Ceramics, 2017, 11, 2, 127-135
Publisher:
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
TY - JOUR
AU - Gilic, Martina
AU - Petrović, Milica
AU - Ćirković, Jovana
AU - Paunović, Novica
AU - Savic-Sević, Svetlana
AU - Nikitović, Zeljka
AU - Romčević, Maja
AU - Yahia, Ibrahim
AU - Romčević, Nebojša
PY - 2017
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1031
AB - Thin films of CuSe2 nanoparticles embedded in selenium matrix were prepared by vacuum evaporation method on a glass substrate at room temperature. The optical properties of the films were investigated by photoluminescence spectroscopy (T = 20-300K) and UV-VIS spectroscopy (T = 300K). Surface morphology was investigated by scanning electron microscopy. The band gap for direct transition in CuSe2 was found to be in the range of 2.72-2.75 eV and that for indirect transition is in the range of 1.71-1.75 eV determined by UV-VIS spectroscopy. On the other hand, selenium exhibits direct band gap in the range of 2.33-2.36 eV. All estimated band gaps slightly decrease with the increase of the film thickness. Photoluminescence spectra of the thin films clearly show emission bands at about 1.63 and 2.32 eV at room temperature, with no shift observed with decreasing temperature. A model was proposed for explaining such anomaly.
PB - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2 - Processing and Application of Ceramics
T1 - Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films
EP - 135
IS - 2
SP - 127
VL - 11
DO - 10.2298/PAC1702127G
ER -
@article{
author = "Gilic, Martina and Petrović, Milica and Ćirković, Jovana and Paunović, Novica and Savic-Sević, Svetlana and Nikitović, Zeljka and Romčević, Maja and Yahia, Ibrahim and Romčević, Nebojša",
year = "2017",
abstract = "Thin films of CuSe2 nanoparticles embedded in selenium matrix were prepared by vacuum evaporation method on a glass substrate at room temperature. The optical properties of the films were investigated by photoluminescence spectroscopy (T = 20-300K) and UV-VIS spectroscopy (T = 300K). Surface morphology was investigated by scanning electron microscopy. The band gap for direct transition in CuSe2 was found to be in the range of 2.72-2.75 eV and that for indirect transition is in the range of 1.71-1.75 eV determined by UV-VIS spectroscopy. On the other hand, selenium exhibits direct band gap in the range of 2.33-2.36 eV. All estimated band gaps slightly decrease with the increase of the film thickness. Photoluminescence spectra of the thin films clearly show emission bands at about 1.63 and 2.32 eV at room temperature, with no shift observed with decreasing temperature. A model was proposed for explaining such anomaly.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films",
pages = "135-127",
number = "2",
volume = "11",
doi = "10.2298/PAC1702127G"
}
Gilic, M., Petrović, M., Ćirković, J., Paunović, N., Savic-Sević, S., Nikitović, Z., Romčević, M., Yahia, I.,& Romčević, N.. (2017). Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 11(2), 127-135.
https://doi.org/10.2298/PAC1702127G
Gilic M, Petrović M, Ćirković J, Paunović N, Savic-Sević S, Nikitović Z, Romčević M, Yahia I, Romčević N. Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films. in Processing and Application of Ceramics. 2017;11(2):127-135.
doi:10.2298/PAC1702127G .
Gilic, Martina, Petrović, Milica, Ćirković, Jovana, Paunović, Novica, Savic-Sević, Svetlana, Nikitović, Zeljka, Romčević, Maja, Yahia, Ibrahim, Romčević, Nebojša, "Low-temperature photoluminescence of CuSe2 nano-objects in selenium thin films" in Processing and Application of Ceramics, 11, no. 2 (2017):127-135,
https://doi.org/10.2298/PAC1702127G . .
