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
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
Dubey P., J. Gomez, S. Manandhar, V. Shutthanandan, and C. Ramana. 2018. "Microstructure tuning facilitated photo-efficiency enhancement and environmental benign nature of HfO2/Mo/HfO2 multilayer films." Solar Energy 166. PNNL-SA-134485. doi:10.1016/j.solener.2017.12.021
Fan D, R Anitori, BM Tebo, PG Tratnyek, JS Lezama Pacheco, RK Kukkadapu, L Kovarik, MH Engelhard, and ME Bowden. 2014. "Oxidative Remobilization of Technetium Sequestered by Sulfide-Transformed Nano Zerovalent Iron." Environmental Science & Technology 48(13):7409-7417. doi:10.1021/es501607s
Manandhar S., A.K. Battu, A. Devaraj, V. Shutthanandan, S. Thevuthasan, and C.V. Ramana. 2020. "Rapid Response High Temperature Oxygen Sensor Based on Titanium Doped Gallium Oxide." Scientific Reports 10, no. 1:Article No. 178. PNNL-SA-134484. doi:10.1038/s41598-019-54136-8
Martinez G, V Shutthanandan, S Thevuthasan, JF Chessa, and CV Ramana. 2013. "Effect of Thickness on the Structure, Composition and Properties of Titanium Nitride Nano-Coatings ." Ceramics International 40(4):5757-5764. doi:10.1016/j.ceramint.2013.11.014
Murphy NR, JT Grant, L Sun, JG Jones, R Jakubiak, V Shutthanandan, and CV Ramana. 2014. "Correlation Between Optical Properties And Chemical Composition Of Sputter-deposited Germanium Cxide (GeOx) Films ." Optical Materials 36:1177-1182. doi:10.1016/j.optmat.2014.02.023
Rubio EJ, G Martinez, M Noor-A-Alam, SW Stafford, V Shutthanandan, and CV Ramana. 2013. "Microstructure And Thermal Oxidation Behavior Of Yttria-stabilized Hafnia Nanostructured Coatings Deposited On Alumina." Surface & Coatings Technology 236:142-148. doi:10.1016/j.surfcoat.2013.09.004
Rubio EJ, TE Mates, S Manandhar, MI Nandasiri, V Shutthanandan, and CV Ramana. 2016. "Tungsten Incorporation into Gallium Oxide: Crystal Structure, Surface and Interface Chemistry, Thermal Stability and Interdiffusion." Journal of Physical Chemistry C 120(47):26720-26735. doi:10.1021/acs.jpcc.6b05487