Anomalous photovoltaic effect in nanocrystalline Si/SiO2 composites

被引：15

作者：

Aharoni, H. Levi ^{[1
]}

Azulay, D.

Millo, O.

Balberg, I.

机构：

[1] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 11期

基金：

以色列科学基金会;

关键词：

D O I：

10.1063/1.2897294

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have observed an anomalous photovoltaic effect in films of Si nanocrystals embedded in SiO2. Using conductive-probe atomic force microscopy and global transport measurements, we found, close to the percolation threshold of the Si crystallite phase, a large photovoltaic effect of up to about 7 V. Following the dependence of this effect on the size of the Si nanocrystals and on the relative tip position with respect to the counterelectrode, we suggest a model based on charge separation of excited electron-hole pairs governed by the size-dependent quantum confinement and charging energies. (c) 2008 American Institute of Physics.

引用

页数：3

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