Predicting a quaternary tungsten oxide for sustainable photovoltaic application by density functional theory
- Univ. of Texas, Arlington, TX (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
A quaternary oxide, CuSnW2O8 (CTTO), has been predicted by density functional theory (DFT) to be a suitable material for sustainable photovoltaic applications. CTTO possesses band gaps of 1.25 eV (indirect) and 1.37 eV (direct), which were evaluated using the hybrid functional (HSE06) as a post-DFT method. The hole mobility of CTTO was higher than that of silicon. Further, optical absorption calculations demonstrate that CTTO is a better absorber of sunlight than Cu2ZnSnS4 and CuInxGa1–xSe2 (x = 0.5). In addition, CTTO exhibits rigorous thermodynamic stability comparable to WO3, as investigated by different thermodynamic approaches such as bonding cohesion, fragmentation tendency, and chemical potential analysis. Chemical potential analysis further revealed that CTTO can be synthesized at flexible experimental growth conditions, although the co-existence of at least one secondary phase is likely. Lastly, like other Cu-based compounds, the formation of Cu vacancies is highly probable, even at Cu-rich growth condition, which could introduce p-type activity in CTTO.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1236148
- Alternate ID(s):
- OSTI ID: 1228436
- Report Number(s):
- NREL/JA-5K00-64682; APPLAB
- Journal Information:
- Applied Physics Letters, Vol. 107, Issue 23; Related Information: Applied Physics Letters; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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Related Subjects
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
solar energy
crystal structure
photonic bandgap materials
semiconductor growth
transition metal oxides
electronic transport
chemical elements
photovoltaics
electronic bandstructure
chemical thermodynamics
hybrid density functional calculations
optical absorption
density functional theory