Effects of size polydispersity on electron mobility in a two-dimensional quantum-dot superlattice

被引：12

作者：

Xu, Shicheng ^{[1
]}

Thian, Dickson ^{[2
]}

Wang, Shengkai ^{[1
]}

Wang, Yanming ^{[3
]}

Prinz, Fritz B. ^{[1
,3
]}

机构：

[1] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

来源：

PHYSICAL REVIEW B | 2014年 / 90卷 / 14期

关键词：

FIELD-EFFECT TRANSISTORS; COLLOIDAL NANOCRYSTALS; MOLECULAR-DYNAMICS; CHARGE-TRANSPORT; SOLIDS; ASSEMBLIES; SYSTEMS; FILMS;

D O I：

10.1103/PhysRevB.90.144202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We found that the transitions between delocalized electronic states in quantum-dot superlattices with smaller size dispersion can account for higher electron mobility. In particular, we solved for the quantum states of a two-dimensional quantum-dot (QD) superlattice using a one-electron approximation. Electron transport properties were studied by considering hopping transitions among coupled delocalized electronic states. Molecular dynamics simulations were employed to introduce disorders in superlattice configurations as a function of QD size and size dispersion for calculation of electron mobility. The interparticle spacing, size, and temperature dependence of the electron mobility can be well explained within the framework of our analysis.

引用

页数：5

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