Variable range hopping conduction in semiconductor nanocrystal solids

被引：360

作者：

Yu, D ^{[1
]}

Wang, CJ ^{[1
]}

Wehrenberg, BL ^{[1
]}

Guyot-Sionnest, P ^{[1
]}

机构：

[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 21期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.92.216802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The temperature and electrical field dependent conductivity of n-type CdSe nanocrystal thin films is investigated. In the low electrical field regime, the conductivity follows sigmasimilar toexp[-(T*/T)(1/2)] in the temperature range 10<T<120 K. At high electrical field, the conductivity is strongly field dependent. At 4 K, the conductance increases by 8 orders of magnitude over one decade of bias. At a very high field, conductivity is temperature independent with sigmasimilar toexp[-(E*/E)(1/2)]. The complete behavior is very well described by variable range hopping with a Coulomb gap.

引用

页码：216802 / 1

页数：4

共 21 条

[1] TEMPERATURE-DEPENDENCE AND FIELD-DEPENDENCE OF HOPPING CONDUCTION IN DISORDERED SYSTEMS .2. [J].