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

共 32 条

[1] Granular electronic systems [J].

Beloborodov, I. S. ;

Lopatin, A. V. ;

Vinokur, V. M. ;

Efetov, K. B. .

REVIEWS OF MODERN PHYSICS, 2007, 79 (02) :469-518

[2] MOLECULAR-DYNAMICS WITH COUPLING TO AN EXTERNAL BATH [J].

BERENDSEN, HJC ;

POSTMA, JPM ;

VANGUNSTEREN, WF ;

DINOLA, A ;

HAAK, JR .

JOURNAL OF CHEMICAL PHYSICS, 1984, 81 (08) :3684-3690

[3] Nanoscale Forces and Their Uses in Self-Assembly [J].

Bishop, Kyle J. M. ;

Wilmer, Christopher E. ;

Soh, Siowling ;

Grzybowski, Bartosz A. .

SMALL, 2009, 5 (14) :1600-1630

[4] Electron transport in quantum dot solids: Monte Carlo simulations of the effects of shell filling, Coulomb repulsions, and site disorder [J].

Chandler, R. E. ;

Houtepen, A. J. ;

Nelson, J. ;

Vanmaekelbergh, D. .

PHYSICAL REVIEW B, 2007, 75 (08)

[5] Charge Transport in a Quantum Dot Supercrystal [J].

Chu, Iek-Heng ;

Radulaski, Marina ;

Vukmirovic, Nenad ;

Cheng, Hai-Ping ;

Wang, Lin-Wang .

JOURNAL OF PHYSICAL CHEMISTRY C, 2011, 115 (43) :21409-21415

[6] Low Voltage, Hysteresis Free, and High Mobility Transistors from All-Inorganic Colloidal Nanocrystals [J].

Chung, Dae Sung ;

Lee, Jong-Soo ;

Huang, Jing ;

Nag, Angshuman ;

Ithurria, Sandrine ;

Talapin, Dmitri V. .

NANO LETTERS, 2012, 12 (04) :1813-1820

[7] COULOMB GAP AND LOW-TEMPERATURE CONDUCTIVITY OF DISORDERED SYSTEMS [J].

EFROS, AL ;

SHKLOVSKII, BI .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1975, 8 (04) :L49-L51

[8] Electrical Transport in Colloidal Quantum Dot Films [J].

Guyot-Sionnest, Philippe .

JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2012, 3 (09) :1169-1175

[9] The London - Van Der Waals attraction between spherical particles [J].

Hamaker, HC .

PHYSICA, 1937, 4 :1058-1072

[10] Size- and Temperature-Dependent Charge Transport in PbSe Nanocrystal Thin Films [J].

Kang, Moon Sung ;

Sahu, Ayaskanta ;

Norris, David J. ;

Frisbie, C. Daniel .

NANO LETTERS, 2011, 11 (09) :3887-3892

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