Transport properties of mid-infrared colloidal quantum dot films

TL;DR

This paper investigates the transport and thermal properties of HgTe colloidal quantum dot films in the mid-infrared range, exploring their potential as cost-effective alternatives to traditional detectors.

Contribution

It introduces methods to enhance carrier mobility in HgTe quantum dot films through post-deposition processes like ligand exchange and atomic layer deposition.

Findings

Tunable cut-off wavelength over 3-5 μm range

Ligand exchange improves carrier mobility

Atomic layer deposition enhances film properties

Abstract

The transport and thermal properties of HgTe colloidal quantum dot films with cut-off wavelengths in the mid-IR are investigated. The cut-off wavelength of this material can be tuned over the 3-5 \mu m range, which makes it a promising alternative to existing high cost detectors. Post deposition processes such as ligand exchange and atomic layer deposition are investigated as a way to increase the carrier mobility.