Photocarrier injection to perovskite manganites
Photocarrier injection to perovskite manganites
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DOI：
10.1016/j.jmmm.2003.12.121
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发表时间：
2004-05
影响因子：
2.7
通讯作者：
T. Muramatsu;Y. Muraoka;T. Yamauchi;J. Yamaura;Z. Hiroi
中科院分区：
文献类型：
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作者：
T. Muramatsu;Y. Muraoka;T. Yamauchi;J. Yamaura;Z. Hiroi
采用脉冲激光沉积技术在掺Nb的n型SrTiO_3衬底上制备了（La，Sr）MnO_3薄膜。结果表明，在紫外光照射下，在衬底中光生的空穴载流子被有效地注入到薄膜中。通过测量异质结的面外电压，估计注入（La，Sr）MnO 3的空穴载流子的表面密度：最大为1.6× 1013 cm-2，但通过改变结结构，提高到3.1× 1013 cm-2，即，在薄膜和衬底之间插入纯SrTiO 3层。
We have fabricated (La,Sr)MnO3thin films on n-type SrTiO3substrates doped with Nb by means of the pulsed laser deposition technique. It is shown that hole carriers photogenerated in the substrates under UV light irradiation are injected efficiently to the films. By measuring the out-of-plane voltage of the heterojunction the surface density of hole carriers injected to (La,Sr)MnO3is estimated: It is at most 1.6×1013cm−2, but is improved up to 3.1×1013cm−2by modifying the junction structure, i.e., inserting a pure SrTiO3layer between the film and the substrate.