Highly intense room-temperature photoluminescence in V2O5 nanospheres

Top Khac Le; Manil Kang; Sang Wook Han; Sok Won Kim

doi:10.1039/c8ra06861e

Highly intense room-temperature photoluminescence in V₂O₅ nanospheres

RSC Adv. 2018 Dec 11;8(72):41317-41322. doi: 10.1039/c8ra06861e. eCollection 2018 Dec 7.

Authors

Top Khac Le¹, Manil Kang², Sang Wook Han¹, Sok Won Kim¹

Affiliations

¹ Department of Physics, University of Ulsan Ulsan 44610 Republic of Korea sokkim@ulsan.ac.krb.
² Department of Physics, Kongju National University Kongju 32588 Republic of Korea ifriver@kongju.ac.kr.

Abstract

Room-temperature photoluminescence (PL) in V₂O₅ nanospheres with zero-like dimensional structure was investigated. A large number of V⁴⁺ oxidation states in the nanospheres were observed by X-ray photoelectron spectroscopy (XPS) measurements. The nanospheres revealed high PL intensity compared with previous studies. In particular, they showed intense ultraviolet (UV) PL near a wavelength of 396 nm (3.13 eV). The intense UV PL was attributed to the enhanced transition probability due to the large number of V⁴⁺ (3d¹) oxidation states. The PL properties showed strong dependencies on the oxidation states and their distribution.