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Various electrophotoluminescence effects of phosphors continuously excited by ultraviolet radiation were studied for their dependence on field strength and frequency. These effects include luminescence stimulations at application and removal of alternating electric fields, quenching, and a periodic fluctuation of luminescence (ripple) during the field application. For some electroluminescent phosphors, the gradual transition from the quenching ripple to the electroluminescence brightness wave was observed, indicating that the brightness waves and the ripple patterns are produced by independent processes. The observations are discussed in the light of previous theoretical considerations.
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Matossi et al. (1956) studied this question.
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