期刊
PHYSICAL REVIEW B
卷 87, 期 16, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.87.165203
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资金
- National Science Foundation [OCI-1053575]
- [NSF-CHE-0802907]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [0802907] Funding Source: National Science Foundation
Tungsten trioxide (WO3) is an Earth abundant material of potential use as a light absorber for solar energy conversion processes. We carried out ab initio calculations of the band structure and absorption spectrum of WO3 using many-body perturbation theory and we present a detailed comparison of our results with photoemission and absorption data. We show that it is necessary to take into account multiple effects, including spin-orbit and electron-phonon interactions and exciton binding in order to correctly predict the measured optical gap. The absorption spectrum obtained by solving the Bethe-Salpeter equation compares well with experiments over a wide energy range, and our calculations correctly account for the redshift observed experimentally upon N-2 intercalation in WO3. DOI: 10.1103/PhysRevB.87.165203
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