An n- to p-type conductivity transition induced by oxygen adsorption on α-Fe2O3

被引：163

作者：

Gurlo, A ^{[1
]}

Bârsan, N ^{[1
]}

Oprea, A ^{[1
]}

Sahm, M ^{[1
]}

Sahm, T ^{[1
]}

Weimar, U ^{[1
]}

机构：

[1] Univ Tubingen, Inst Phys & Theoret Chem, D-72076 Tubingen, Germany

来源：

APPLIED PHYSICS LETTERS | 2004年 / 85卷 / 12期

关键词：

D O I：

10.1063/1.1794853

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The simultaneous measurements of conductance and work function changes induced by gaseous ambient have been performed on alpha-Fe2O3 thick film polycrystalline samples kept at 280 degreesC and exposed to different gaseous atmospheres. The switching from n- to p-type conductivity on alpha-Fe2O3 is shown to have an electronic origin, which is due to the oxygen adsorption and formation of a surface inversion layer and, therefore, to the inversion of the surface conduction type. The modeling of the n-p switching is described in terms of conductance dependence on the band bending induced by gaseous ambient. (C) 2004 American Institute of Physics.

引用

页码：2280 / 2282

页数：3

共 19 条

[1] Bârsan N, 2003, J PHYS-CONDENS MAT, V15, pR813, DOI 10.1088/0953-8984/15/20/201
[2] MECHANISM OF GAS-DETECTION IN POLYCRYSTALLINE THICK-FILM SNO2 SENSORS
BARSAN, N
GRIGOROVICI, R
IONESCU, R
MOTRONEA, M
VANCU, A
[J]. THIN SOLID FILMS, 1989, 171 (01) : 53 - 63
[3] ELECTRIC CONDUCTIVITY AND CATALYTIC ACTIVITY OF SEMICONDUCTING OXIDE CATALYSTS
BIELANSKI, A
DEREN, J
HABER, J
[J]. NATURE, 1957, 179 (4561) : 668 - 679
[4] Selectivity and composition dependence of response of wolframite-based gas sensitive resistors (MWO4)x([Sn-Ti]O2)1-x, (0<x<1, M = Mn, Fe, Co, Ni, Cu, Zn)
Dusastre, V
Williams, DE
[J]. JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (04) : 965 - 971
[5] p- and n-type Fe-doped SnO2 gas sensors fabricated by the mechanochemical processing technique
Galatsis, K
Cukrov, L
Wlodarski, W
McCormick, P
Kalantar-zadeh, K
Comini, E
Sberveglieri, G
[J]. SENSORS AND ACTUATORS B-CHEMICAL, 2003, 93 (1-3) : 562 - 565
[6] ELECTRICAL PROPERTIES OF ALPHA FERRIC OXIDE .1. IMPURE OXIDE
GARDNER, RFG
SWEETT, F
TANNER, DW
[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1963, 24 (10) : 1175 - &
[7] GURLO A, IN PRESS SEN ACTUA B
[8] DONOR LEVELS IN ALPHA-FE2O3
KOBAYASHI, K
OKADA, G
KUMANOTANI, J
[J]. JOURNAL OF MATERIALS SCIENCE LETTERS, 1988, 7 (08) : 853 - 854
[9] Acceptor-like behavior of reducing gases on the surface of n-type In2O3
Korotcenkov, G
Brinzari, V
Golovanov, V
Cerneavschi, A
Matolin, V
Tadd, A
[J]. APPLIED SURFACE SCIENCE, 2004, 227 (1-4) : 122 - 131
[10] LICZNERSKI BW, 1992, SENSOR ACTUAT B-CHEM, V7, P626

← 1 2 →