J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (6): 670-673.DOI: 10.1016/j.jmst.2014.09.017

• Orginal Article • Previous Articles    

Deep Ultraviolet Emission from Water-Soluble SnO2 Quantum Dots Grown via a Facile “Top-Down” Strategy

Shusheng Pan1, 2, **, Wei Lu1, Zhaoqin Chu2, Guanghai Li2, *   

  1. 1 Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China; 2 Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanostructures, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2014-08-22 Online:2015-06-20 Published:2015-07-23
  • Contact: *Corresponding author. Prof., Ph. D.; Tel.: +86 551 65591437; Fax: ++86 551 65591434. *Corresponding author. Ph. D.; Tel.: +86 551 65591465; Fax: +86 551 65591434. E-mail addresses: sspan@issp.ac.cn (S. Pan), ghli@issp.ac.cn (G. Li).
  • Supported by:
    The authors gratefully acknowledge the financial support of the project from the National Natural Science Foundation of China (Grant Nos. 11004197, 11374309, and 11104270), China Postdoctoral Science Foundation Funded Project (Grant No. 2013M541847), “Hong Kong Scholars Program” (Grant Nos. XJ2011039, and 201104336).

Abstract: Tin oxide (SnO2) is a promising wide bandgap semiconductor for next generation ultraviolet (UV) non-polar optoelectronic devices applications. The development of SnO2-based optoelectronic devices is obsessed by its low exciton emission efficiency. In this study, quantum confined SnO2 nanocrystals have been fabricated via pulsed laser ablation in water. The SnO2 quantum dots (QDs) possess high performance exciton emission at 297-300 nm light in water. The exciton emission intensity and wavelength can be slightly tuned by laser pulse energy and irradiation time. Optical gain has been observed in SnO2 QDs. Therefore, SnO2 QDs can be a promising luminescence material for the realization of deep UV nano-emitter and lasing devices.

Key words: SnO2, Wide bandgap semiconductor, Deep ultraviolet, Pulsed laser ablation