Impedance and Mott-Schottky analysis of a Pr0.15Ce0.85O2-x solid solution

被引：0
|
作者：
Bouchet, R [1 ]
Knauth, P [1 ]
Stefanik, T [1 ]
Tuller, HL [1 ]
机构：
[1] Univ Aix Marseille 1, CNRS, MADIREL, Ctr Saint Jerome,UMR 6121, F-13397 Marseille 20, France
来源：
SOLID STATE IONICS-2002 | 2003年 / 756卷
关键词：
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The semiconductor properties of a praseodymium-cerium oxide solid solution with composition Pr0.15Ce0.85O2-x (PCO) were investigated by d.c. current-voltage and bias-dependent impedance measurements in aqueous solution. The solution data were compared with impedance values of dry cells in air. A Mott-Schottky analysis of the PCO-solution interface capacitance showed p-type semiconductivity, a flat-band potential E-fb = (2.0 +/- 0.1) V/NHE and an ionized, acceptor density N-A = 3 10(17) cm(-3). Using these data, an electron hole mobility mu(h) approximate to 10(-5) cm(2) V-1 s(-1) was calculated pointing to a small polaron conduction mechanism with a hopping energy (E-h = 0.4 eV).
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页码：169 / 174
页数：6
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