Investigation of Surface/Interface Structure and Chemistry of Tungsten-Based Oxides and Oxynitrides
EMSL Project ID
46698
Abstract
The focus of the present project is on the tungsten (W) based oxide and oxynitride thin-films, which will have numerous applications in energy conversion and utilization technologies. The goal of the project is to develop a fundamental scientific understanding of nitrogen and metal incorporated W-based oxides. The primary objective of the proposed research is to realize very high optical quality W-R-O (R: anion or cation) films which can selectively present electrical conductivity from metallic to insulating extremes when tuned. Accomplishing the goals and objectives will involve a series of materials' fabrication, testing, property measurements and performance evaluation. Understanding the fundamental science and the microstructure changes upon R-doping is the key to tune the W-R-O materials with the desired optical and electrical characteristics. It is, therefore, intended to use the state-of-art analytical techniques existing at the Environmental and Molecular Sciences Laboratory (EMSL) within the Pacific Northwest National Laboratory (PNL) to explore the fundamental science of W-R-O materials. The requested resources will help to understand the site-location of specific atoms (nitrogen/metal), doping/substituion induced changes in the crystal structure and surface/interface chemistry, strain and lattice expansion/contraction (if any), and electronic-charge redistribution leading to ultimate properties and performance. The experiments will also help to derive the functional structure-property relationship, which will provide a roadmap for effective utilization of the W-R-O thin films in solar-assited energy conversion and utilization applications.
Project Details
Project type
Exploratory Research
Start Date
2012-01-17
End Date
2013-02-12
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Controlled optical properties via chemical composition tuning in molybdenum-incorporated β-Ga2O3 nanocrystalline films
Battu AK, S Manandhar, V Shutthanandan, and CV Ramana. 2017. "Controlled Optical Properties via Chemical Composition Tuning in Molybdenum-Incorporated ?-Ga2O3 Nanocrystalline Films." Chemical Physics Letters 684:363-367. doi:10.1016/j.cplett.2017.06.063