交流电压下聚合物绝缘材料电致发光特性

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Abstract Electroluminescence(EL)measurement setup was designed to study the EL from surface of different polymeric insulation materials under ac voltage. The LDPE, PP and PTFE are employed to investigate their surface EL time-phase-domain characteristics. The effects of different electrode materials(Cu and Al)and sputtered gold film electrode on EL are explored. Experimental results reveal that different materials show different initial onset EL voltage and EL intensity, but they have the similar time-/phase-domain behaviors. All the light curves reveal the characteristic similar to the hysteresis of ferromagnetic material under stepped ac voltages. Moreover, it is found that the EL corresponding to different electrode materials and contact with sputtered gold film also displays the different critical voltage and light intensity. It is primarily considered that, the contact barrier between electrode and material and the space charges inside polymers greatly affect their EL characteristics.

Key words： Electroluminescence sputtered electrode polymer recombination contact barrier

Received: 06 December 2007 Published: 12 February 2014

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TM85

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