Enhanced photoluminescence of potassium-doped tungsten oxide by acetone exposure

Aman Patel; Weigang Lu; Blake Birmingham; Michael Johnson; Danling Wang; Zhenrong Zhang; Kai Wang

doi:10.1039/d2ra06267d

Enhanced photoluminescence of potassium-doped tungsten oxide by acetone exposure

RSC Adv. 2023 Jan 4;13(2):1236-1244. doi: 10.1039/d2ra06267d. eCollection 2023 Jan 3.

Authors

Aman Patel¹, Weigang Lu¹, Blake Birmingham¹, Michael Johnson², Danling Wang², Zhenrong Zhang¹, Kai Wang^{3

4}

Affiliations

¹ Department of Physics, Baylor University Waco 76798 Texas USA aman_patel1@baylor.edu.
² Department of Electrical and Computer Engineering, North Dakota State University Fargo 58102 ND USA.
³ School of Physics and Astronomy, Sun Yat-sen University Zhuhai 519082 China wangk289@mail.sysu.edu.cn.
⁴ Center of Quantum Information Technology, Shenzhen Research Institute of Sun Yat-sen University Nanshan Shenzhen 518087 China.

Abstract

Studies of optical properties of doped nanocrystals of tungsten trioxide can elucidate new information about the material. A novel molecule-enhanced photoluminescence (PL) of potassium-doped tungsten trioxide (K _x WO) was explored in the presence of different gases to understand charge transfer between molecules and K _x WO on the properties of the material. We performed Raman spectroscopy and PL experiments in the presence of gaseous acetone or ethanol mixed with other gases (N₂ and O₂). PL at 630 nm from K _x WO was observed and further enhanced when the sample was continuously irradiated with a 532 nm CW laser in acetone. A mechanism of strong emission of the PL induced by the charge transfer between the acetone and the K _x WO is proposed.