ACS Nano. 2015 Jun 23;9(6):6077-87. doi: 10.1021/acsnano.5b01221. Epub 2015 Jun 08.

Metal Domain Size Dependent Electrical Transport in Pt-CdSe Hybrid Nanoparticle Monolayers.

ACS nano

Michaela Meyns, Svenja Willing, Hauke Lehmann, Christian Klinke

PMID: 26052966 DOI: 10.1021/acsnano.5b01221

Abstract

Thin films prepared of semiconductor nanoparticles are promising for low-cost electronic applications such as transistors and solar cells. One hurdle for their breakthrough is their notoriously low conductivity. To address this, we precisely decorate CdSe nanoparticles with platinum domains of one to three nanometers in diameter by a facile and robust seeded growth method. We demonstrate the transition from semiconductor to metal dominated conduction in monolayered films. By adjusting the platinum content in such solution-processable hybrid, oligomeric nanoparticles the dark currents through deposited arrays become tunable while maintaining electronic confinement and photoconductivity. Comprehensive electrical measurements allow determining the reigning charge transport mechanisms.

Keywords: Langmuir−Blodgett deposition; colloidal hybrid nanoparticles; electrical transport; photoconductivity; size effects

Publication Types

• Journal Article
• Research Support, Non-U.S. Gov't