Controlling the exciton energy of zinc oxide (ZnO) quantum dots by changing the confinement conditions

被引：98

作者：

Repp, Sergej ^{[1
]}

Erdem, Emre ^{[1
]}

机构：

[1] Univ Freiburg, Inst Phys Chem, D-79104 Freiburg, Germany

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2016年 / 152卷

关键词：

ZnO nanoparticles; Electron paramagnetic resonance (EPR) spectroscopy; Photoluminescence (PL) spectroscopy; Quantum dots; INVERTED CORE/SHELL NANOCRYSTALS; ELECTRON-PARAMAGNETIC-RESONANCE; OPTICAL-PROPERTIES; PHOTOLUMINESCENCE PROPERTIES; LUMINESCENCE PROPERTIES; MAGNETIC-RESONANCE; GREEN LUMINESCENCE; ESR INVESTIGATIONS; INTRINSIC DEFECTS; NANOPARTICLES;

D O I：

10.1016/j.saa.2015.01.110

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

ZnO nanoparticles were synthesized by solid state and hydrolysis methods based on the conventional precipitation. In situ growth of ZnO nanoparticles were monitored by photoluminescence spectroscopy (PL). By the help of electron paramagnetic resonance (EPR) technique, detailed analysis of intrinsic defect structure of ZnO was given with respect to mean particle size. In nanoscale concentration of surface defects enormously increased and core defects reduced. In addition, blue-shift was observed in PL spectra at near-band-edge UV region due to e-h recombination. Calculation of band gap energies by the aid of Brus equation revealed consistent results with the experimental observations. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：637 / 644

页数：8

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