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Int. J. Electroactive Mater. 6 (2018) 8-13

Electro-Optical studies of ZnSe:Tb and ZnSe:(Mn,Tb) Phosphors

Ajai Kumar Mishra1*, Pragati Mishra2, Kshama Lakshmi Mishra3, S P Pandey4

1Physics, Wollega University, Nekemte ,Ethiopia, Nekemte, Nekemte, Etiopio
2Physics, DDU Gorakhpur University Gorakhpur, Gorakhpur, Uttar Pradesh, India
3Physics, Shree Thakurdwara Balika Vidyalaya, Ghaziabad, Uttar Pradesh, India
4Physics, MMU Mullana, Ambala, Haryana, India

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Abstract : ZnSe:Tb and ZnSe:(Mn,Tb) phosphors have been prepared by firing the samples in nitrogen gas atmosphere. Photoluminescence (PL) and electroluminescence (EL) of these phosphors have been studied. The emission of yellow and red bands has been interpreted in terms of different electronic transition. The voltage and frequency variation of EL brightness are in agreement with collision-excitation mechanism, i.e. Schottky barrier at the metal semiconductor interface.

Keywords : Photoluminescence (PL), Electroluminescence (EL),Phosphors, Energy transfer, Schottky barrier,donor-acceptor (D-A) pair