Tunable Quantum Dot Solids: Impact of Interparticle Interactions on Bulk Properties

Technical Report · Tue Sep 01 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1221577· OSTI ID:1221577

Sinclair, Michael B. ^[1]; Fan, Hongyou ^[1]; Brener, Igal ^[1]; Liu, Sheng ^[1]; Luk, Ting S. ^[1]; Li, Binsong ^[1]

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1. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)

QD-solids comprising self-assembled semiconductor nanocrystals such as CdSe are currently under investigation for use in a wide array of applications including light emitting diodes, solar cells, field effect transistors, photodetectors, and biosensors. The goal of this LDRD project was develop a fundamental understanding of the relationship between nanoparticle interactions and the different regimes of charge and energy transport in semiconductor quantum dot (QD) solids. Interparticle spacing was tuned through the application of hydrostatic pressure in a diamond anvil cell, and the impact on interparticle interactions was probed using x-ray scattering and a variety of static and transient optical spectroscopies. During the course of this LDRD, we discovered a new, previously unknown, route to synthesize semiconductor quantum wires using high pressure sintering of self-assembled quantum dot crystals. We believe that this new, pressure driven synthesis approach holds great potential as a new tool for nanomaterials synthesis and engineering.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1221577
• Report Number(s): SAND2015-8043; 603922
• Country of Publication: United States
• Language: English