TY - JOUR
T1 - The Role of Nitrogen Dopants in ZnO Nanoparticle-Based Light Emitting Diodes
AU - Shafiqul, Islam Mohammad
AU - Deep, Raj
AU - Lin, Jie
AU - Yoshida, Toshiyuki
AU - Fujita, Yasuhisa
N1 - Funding Information:
Funding: This work was partially supported by MEXT of Japan City Area Program of Shinji Lake and Nakaumi (2009–2012), JSPS KAKENHI Grant Number 25630150, The Canon Foundation, and S-Nanotech Co-Creation Co., Ltd.
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/2/1
Y1 - 2022/2/1
N2 - In this work, nitrogen-doped ZnO nanoparticles were synthesized in various conditions by the gas evaporation method with DC arc plasma. Nitrogen concentrations of 6.38 × 1018 cm−3 to 2.6 × 1019 cm−3 were obtained at a chamber pressure of 150 torr, using arc currents of 20 A to 70 A. The intensities of local vibrational modes at 275 cm−1 and 581 cm−1 in the Raman spectra of ZnO nanoparticles showed a dependency on the nitrogen concentration in the ZnO nanoparticles. The ratios of donor–acceptor pair and exciton emissions in the photoluminescence spectra of nitrogen-doped ZnO nanoparticles, and the electroluminescence of light-emitting diodes based on these na-noparticles, were nearly proportional to the Raman peak’s intensity at 275 cm−1. The results indi-cated that the nitrogen dopants in the ZnO nanoparticles were acting as an acceptor.
AB - In this work, nitrogen-doped ZnO nanoparticles were synthesized in various conditions by the gas evaporation method with DC arc plasma. Nitrogen concentrations of 6.38 × 1018 cm−3 to 2.6 × 1019 cm−3 were obtained at a chamber pressure of 150 torr, using arc currents of 20 A to 70 A. The intensities of local vibrational modes at 275 cm−1 and 581 cm−1 in the Raman spectra of ZnO nanoparticles showed a dependency on the nitrogen concentration in the ZnO nanoparticles. The ratios of donor–acceptor pair and exciton emissions in the photoluminescence spectra of nitrogen-doped ZnO nanoparticles, and the electroluminescence of light-emitting diodes based on these na-noparticles, were nearly proportional to the Raman peak’s intensity at 275 cm−1. The results indi-cated that the nitrogen dopants in the ZnO nanoparticles were acting as an acceptor.
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U2 - 10.3390/nano12030358
DO - 10.3390/nano12030358
M3 - Article
AN - SCOPUS:85123103897
SN - 2079-4991
VL - 12
JO - Nanomaterials
JF - Nanomaterials
IS - 3
M1 - 358
ER -