ELECTRICAL, OPTICAL AND PHOTOCONDUCTING PROPERTIES OF FE2-XCRXO3 (0LESS THAN OR EQUAL TOXLESS THAN OR EQUAL TO0.47)

被引：111

作者：

MERCHANT, P ^{[1
]}

COLLINS, R ^{[1
]}

KERSHAW, R ^{[1
]}

DWIGHT, K ^{[1
]}

WOLD, A ^{[1
]}

机构：

[1] BROWN UNIV,DEPT CHEM,PROVIDENCE,RI 02912

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1979年 / 27卷 / 03期

关键词：

D O I：

10.1016/0022-4596(79)90173-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A study has been made of the electrical, optical and photoconducting properties of pure and reduced single crystals of composition Fe2-xCrxO3 where 0 ≤ x ≤ 0.47. It has been found that pure α-Fe2O3 is not a photoconductor. When defect-free crystals of α-Fe2O3 are reduced a surface layer of Fe3O4 is formed and the crystals exhibit photoconductivity. Removal of this layer resulted in the disappearance of photocurrents and an increase in the sample resistivity. A necessary condition for the observation of photocurrents in n-type Fe2O3 is that some Fe3O4 be present. In addition, it has been found that the substitution of chromium for iron in α-Fe2O3 results in a monotonically decreasing optical band gap as the chromium concentration, x, increases. © 1979.

引用

页码：307 / 315

页数：9

共 14 条

[1] OPTICAL PROPERTIES OF MAGNETITE [J].