塞贝克系数
结晶度
钴
材料科学
兴奋剂
热电效应
氧化钴
电阻率和电导率
锌
杂质
拉曼光谱
分析化学(期刊)
热电材料
无机化学
冶金
热导率
化学
光电子学
复合材料
光学
有机化学
工程类
物理
电气工程
热力学
色谱法
作者
Hafiz T. Ali,Jolly Jacob,Muneeba Khalid,K. Mahmood,Mohammad Yusuf,Khurram Mehboob,Salma Ikram,Adnan Ali,Nasir Amin,Ambreen Ashar
标识
DOI:10.1016/j.jallcom.2021.159564
摘要
A study is conducted to determine the effects of cobalt doping concentration on structural, morphological and thermoelectric properties of Zinc Oxide (ZnO). To test this hypothesis, cobalt doped zinc oxide nano-particles are prepared by hydrothermal method by modulating the Cobalt (Co) concentration from 0.1 to 0.5. The X-Ray Diffraction (XRD) and Raman data is suggested that crystallinity of grown samples is found to be decreased by increasing the concentration of Co atoms. The poor crystallinity of the sample having higher concentration of Co atoms is due to the emergence of secondary phases. The value of Seebeck coefficient is also improved with doping as indicated by the high Seebeck value (250 µV/°C) of Zn0.5Co0.5O. This enhancement of Seebeck coefficient is linked with the number of secondary phases. In contrast, electrical conductivity is reduced due to the generation of the impurity level close to the conduction band. In conclusion, at higher doping content, the overall power factor is enhanced with a slow increase in Seebeck coefficient and decrease in electrical conductivity by doping content.
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