Electronic coupling in InP nanoparticle arrays

被引：80

作者：

Beard, MC

Turner, GM

Murphy, JE

Micic, OI

Hanna, MC

Nozik, AJ

Schmuttenmaer, CA

机构：

[1] Yale Univ, Dept Chem, New Haven, CT 06504 USA

[2] Univ Colorado, Dept Chem & Biochem, Boulder, CO 80309 USA

[3] Natl Renewable Energy Lab, Ctr Basic Sci, Golden, CO 80401 USA

来源：

NANO LETTERS | 2003年 / 3卷 / 12期

关键词：

D O I：

10.1021/nl0346777

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Arrays and lattices formed from nanoparticles (NPs) present unique opportunities for new optoelectronic materials whose properties can be tuned by controlling the size of the individual NPs and their interparticle separation to effect strong inter-NP electronic coupling. Characterization of the interdot coupling as a function of interdot distance is essential. Using time-resolved THz spectroscopy, we report a six-fold increase in the transient photoconductivity in disordered arrays of 3.2 nm diameter InP NPs separated by 0.9 nm compared to arrays with 1.8 nm separation. Photoconductivity in the arrays is compared to that of isolated NPs and InP epilayers. The epilayer samples exhibit bulk transport behavior while the NP samples do not.

引用

页码：1695 / 1699

页数：5

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