Accession Number:

ADA482526

Title:

Semiconducting Nanocrystals in Mesostructured Thin Films for Optical and Opto-Electronic Device Applications

Descriptive Note:

Final rept. 1 Mar 2005-30 Nov 2006

Corporate Author:

CALIFORNIA UNIV SANTA BARBARA DEPT OF CHEMICAL ENGINEERING

Personal Author(s):

Report Date:

2007-03-01

Pagination or Media Count:

16.0

Abstract:

The compositions, structures, and surface properties of InGaP, GaN, ZnSe, ZnS2, and SiO2 nanocrystals and conjugated polymerSnS2 or SiO2 nanocomposite films have been measured and controlled to modify, enhance, and understand their optical andor semiconducting properties over a hierarchy of dimensions, from molecular to macroscopic. This progress has enabled new and general strategies for the development and optimization of nanocrystals and nanostructured composites for applications in electro- or photoluminescent devices, sensors, and solid-state lighting. The macroscopic optical and semiconducting properties of novel inorganic-organic hybrid materials, based on monodisperse nanocrystals andor ordered nanostructured inorganic-organic composite solids with tunable compositions and dimensions, depend crucially on molecular-level compositions, structures, and interfaces. Till now, such molecular-level structural details have not been measured, not understood, nor have they been used as feedback criteria for improving or optimizing materials syntheses, or device processing conditions. During the course of this project, new molecular-level insights provided by very-high-field and multidimensional NMR characterization protocols have enabled the development of novel nano- and hierarchically scaled optical and semiconducting materials and devices. New and general strategies for controlling nanocrystal structures and interfaces have allowed the incorporation of semiconducting nanocrystals and polymers into nanocomposite films, yielding novel opto-electronic and optical properties.

Subject Categories:

  • Polymer Chemistry
  • Electrical and Electronic Equipment
  • Electrooptical and Optoelectronic Devices
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE