Cite this article:
Nandagawe, Patil, and Lawangar-Pawar (1990). Electroluminescence and electrical properties of (Zn, Cd) S:Mn:Sm luminophors. Journal of Ravishankar University (Part-B: Science), 3(1), pp. 64-70.
Electroluminescence and electrical
properties of (Zn, Cd) S:Mn:Sm luminophors
J K NANDAGAWE and PK PATIL
The New College, Kolhapur-416 002 and
R D LAWANGAR-PAWAR,
Solid State Physics Research
Laboratory, Department
of Physics, Shivaji University, Kolhapur-416 004
MS received 29 March 90; revised
21 July 90
Abstract. (Zn, Cd) S:Mn:Sm phosphons with varying concentrations of Mn2+ alone and along with 0.1 wt% Sm3+ have been prepared
in inert atmoshpher of argon gas. The
dependence of EL-brightness on voltage and frequency are investigated. The elbrightness with voltage is found to obey power
law dependence over wide range of voltages. However Alfrey-Taylor relation is found to agree over a limited region of voltages infering
the existence of Mott-Schottky type barriers in the phosphors. The current-voltage characteristics also support the existence of exhaustion barriers
and EL mechanism as an acceleration collision type. An ettempt has been made
to Interpret the EL-spectra of doubly activated phosphors which give a strong emission band around 585 nm, a very weak
amission band around 525 nm and
a shoulder band
at 625 nm.
Key words: Electroluminescence, Zinc, Cadmium, Sulphides.
NOTE: Full version of this manuscript is available in PDF.