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ac–dc Electroluminescence in ZnS (Powder and Single Crystal)
Author(s) -
Cingolani A.,
Levialdi A.
Publication year - 1965
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220100203
Subject(s) - electroluminescence , electric field , materials science , single crystal , alternating current , analytical chemistry (journal) , crystal (programming language) , range (aeronautics) , time constant , field (mathematics) , constant (computer programming) , condensed matter physics , optoelectronics , voltage , crystallography , chemistry , electrical engineering , physics , nanotechnology , composite material , mathematics , programming language , engineering , layer (electronics) , quantum mechanics , chromatography , computer science , pure mathematics
The enhancement effect (E.E.) of ZnS is measured in a constant electric field superposed on an alternating field. Two cases are considered: a) a conventional sandwich‐type electroluminescent (E.L.) ZnS (Mn, Cu, Cl) micropowder cell; b) a ZnS (Cu, Cl) single crystal (“gap”) cell. Capacity, current, and δ are simultaneously measured at different temperatures between 88 and 300 °K using frequencies in the range 6 to 20 kHz. The frequency corresponding to R max is determined. The variation of R near R max is found to be independet of tg δ. The value of the time constant of the E.L. cell is equal to half a period of the optimum applied frequency. The results are consistent with both the Fischer [1] model and the “impactionization” model.