Hydrogen-free defects in hydrogenated black TiO2
- Title
- Hydrogen-free defects in hydrogenated black TiO2
- Author
- 송태섭
- Keywords
- LITHIUM ION BATTERIES; HYBRID SUPERCAPACITOR; ANODE; PHOTOCATALYSIS; NANOCRYSTALS; GENERATION; CATHODE; OXIDE
- Issue Date
- 2018-06
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v. 20, no. 30, page. 19871-19876
- Abstract
- Black anatase TiO2 has surprisingly enhanced solar energy harvesting efficiency and electrical conductivity, which makes it a promising material in a wide range of energy and environmental applications. Several experimental and theoretical studies have successfully revealed the mechanisms of band gap reduction by surface hydrogenation of anatase TiO2. However, recent experimental evidence suggests the existence of bulk point defects that yield infrared (approximate to 1.0 eV) photoabsorption and high conductivity of black anatase TiO2. In the current study, using a combination of ab initio molecular dynamics simulations and electronic structure calculations, we successfully explain the physical properties, metallicity, and infrared/microwave absorption (i.e., black color) of highly reduced anatase TiO2 crystal in a hydrogenated state with a newly found pair defect (Ti-i-V-O)(4+). Hydrogen atoms in the bulk are unnecessary to understand the observed properties.
- URI
- https://pubs.rsc.org/en/content/articlelanding/2018/CP/C8CP02467G#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/119024
- ISSN
- 1463-9076; 1463-9084
- DOI
- 10.1039/c8cp02467g
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML