Scanning Tunneling Spectroscopy and Luminescent Properties of ZnS:Mn,Cu,Cl Thin Films
G. Neunert, M. Kamiński, B. Susła, T. Dunaj, E. Chimczak and M. Bertrandt-Żytkowiak
Institute of Physics, Poznań University of Technology, Nieszawska 13A, 61-021 Poznań, Poland
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Electrical and luminescent properties of ZnS:Mn,Cu,Cl thin films were investigated. Combined both studies: scanning tunneling microscopy and scanning tunneling spectroscopy were made. The current and differential conductance versus applied voltage were measured for the ZnS:Mn,Cu,Cl thin films. Additionally, the spectral and kinetic properties of the electroluminescent cells based on the ZnS:Mn,Cu,Cl thin films were measured. The maximum of the electroluminescence lies at 586nm. The electroluminescence was excited by rectangular wave voltage pulses with pulse length from 1μs to 1ms. It was shown that time dependence of the electroluminescence is well explained assuming energy transfer between monomolecular centres.
DOI: 10.12693/APhysPolA.104.357
PACS numbers: 78.60.Fi, 78.66.Hf, 68.37.Ef