Phonon modes and activation energy of Fe-doped CdSe nanoparticles

被引：17

作者：

Das, Sayantani ^{[1
]}

Dutta, Alo ^{[2
]}

Banerjee, Sourish ^{[1
]}

Sinha, T. P. ^{[2
]}

机构：

[1] Univ Calcutta, Dept Phys, Kolkata 700009, India

[2] Bose Inst, Dept Phys, Kolkata 700009, India

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2014年 / 18卷

关键词：

CdSe; Nano-particle; Chemical route; HRTEM; Activation energy; STRUCTURAL-CHARACTERIZATION; THIN-FILMS; SEMICONDUCTOR; NANOCRYSTALS; CDTE;

D O I：

10.1016/j.mssp.2013.11.023

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nanoparticles of pure and iron (5% and 10%) doped cadmium selenide (CdSe) have been synthesized by soft chemical route and are found to have cubic structure. EDAX analysis supports the inclusion of Fe into CdSe nanoparticles. The average particle size of pure and doped CdSe is found to be similar to 5 nm. The band gap of the materials is obtained using Tauc relation to UV-visible spectra and found to be about 2.23, 2.14 and 2.1 eV respectively for pure and Fe (5% and 10%) doped CdSe. The observed peaks at 546 nm and 436 nm in the photoluminescence spectra of the samples correspond to 1s-1s transition and its spin orbit component respectively. The Raman and infra-red spectra of the samples are analyzed to obtain the vibrational modes of the samples. The Kissinger equation is applied to the thermograms of differential scanning calorimeter to calculate the activation energy of pure and Fe doped CdSe nanoparticles. The frequency dependent conductivity spectra of the samples are found to follow the power law. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：152 / 159

页数：8

共 32 条

[31] Efficient CdSe/CdS quantum dot light-emitting diodes using a thermally polymerized hole transport layer [J].