Enhancement effect in double band emitting ZnO:Cu,M(H) eleotroluminophors, under the concurrent excitation of a.c. field and UV- radiation (3650 A°) has been investigated. The emissions in green and yellow regions were found to show enhancement at low frequencies (in 1he voltage range of 200-700 volts) of excitation field. While at high frequencies the quenching was observed. The maximum enhancement ratio was found to be always less than 1.33. The enhancement effect is found significant for yellow emission of electroluminophor with increasing excitation voltage of field and manganese concentration in presence of constant UV- radiation.
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Shukla, Tiwari and singh (1992). Radiation Controlled Electroluminescence In Double Band Emitting Zno-Base Electroluminophors. Journal of Ravishankar University (Part-B: Science), 5(1), pp.185-191.