Sr-doping enhanced electrical transport and thermionic emission of single crystal 12CaO•7Al2O3 electride

被引：15

作者：

Zhang, Xin ^{[1
]}

Feng, Qi ^{[1
]}

Zhao, Jiping ^{[1
]}

Liu, Hongliang ^{[1
]}

Li, Jichao ^{[2
]}

Xiao, Yixin ^{[1
]}

Li, Fan ^{[1
]}

Lu, Qingmei ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Mat Sci & Engn, Minist Educ, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China

[2] Shandong Univ, Sch Phys & Microelect, Jinan 250100, Shandong, Peoples R China

来源：

CURRENT APPLIED PHYSICS | 2020年 / 20卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Single crystal (C1-xSx)12A7:e(-); Floating zone method; Electrical properties; Thermionic emission properties; CONDUCTIVITY; MECHANISM; ANIONS; OXIDE;

D O I：

10.1016/j.cap.2019.10.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Sr-doped single crystals (C1-xSx)12A7:e(-) (x = 0, 0.01, 0.02, 0.03) were successfully fabricated by floating zone method. It is found that Sr-doping decreases the reduction time from 30 h to 20 h. The maximum emission current of (C1-xSx)12A7:e(-) is greatly improved by 50% than that of the un-doped. The DFT calculations show Sr-doping in C12A7 contributed to the free O2- in the cages spread out, leading to a short reduction time; increase the "window" between two adjacent cages that is conducive to the electrons in cages to escape. And the work function of the (C1-xSx)12A7:e(-) is lower than that of C12A7:e(-).

引用

页码：96 / 101

页数：6

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