Record Details


Field	Value

Title	Pre-photoexcitation effects in 75 MeV oxygen ion irradiated kapton-H polyimide

Creator	Sharma, Anu

Subject	Ion irradiation Kapton-H Pre-photoexcitation effects Polymers

Description	108-113 The pre-photoexcitation effect measured in the form of dark polarization (Id) under visible radiation in 75 MeV oxygen ion irradiated (Fluence: 1.8×10¹¹, 3.1×10¹² and 1.8×10¹³ ions/cm²) kapton-H polyimide has been investigated. The dependence of Id on exposure (ranging from 0 to 10000 W/m²) and the time interval Δt (ranging from 0 to 7 min) between the end of illumination and the outset of the polarizing electric field have been studied at operating temperatures of 80º and 200ºC under a biasing field of 240 kV/cm. The variation of Id with exposure shows a transitory saturation followed by a gradual descent. The band-band transition and the conversion of trapping sites into recombination centers have been held responsible for such behaviour. The ion irradiated samples, in general, show a decrease in Id as compared to pristine samples. The effect of fluence on Id is mainly associated with the enhancement of charge trapping density and the charge carrier mobility.

Date	2009-02-18T11:02:23Z 2009-02-18T11:02:23Z 2009-02

Type	Article

Identifier	0019-5596 http://hdl.handle.net/123456789/3166

Language	en_US

Publisher	CSIR

Source	IJPAP Vol.47(2) [February 2009]

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