Field dependence of photoconduction in Kapton polyimide film

Pillai, P. K. C.; Sharma, B. L.

doi:10.1016/0032-3861(79)90284-2

Cited by 30 publications

(8 citation statements)

References 6 publications

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“…It is very interesting that the photocurrent of the aliphatic polyimide film is larger than that of the aromatic polyimide film in all applied electric fields, because there has been no previous work on the photoconductivity of aliphatic polyimides, though the photoconductivity of the aromatic polyimides is well known. [5][6][7][8][9][10][11]12] Action Spectra and Quantum Efficiency Figure 5 shows the action spectra of the photocurrents of PI(PMDA/DCHM) and the PI(PMDA/ODA), whose film thickness is 1.0 under an applied electric field of 5.0x10-5 V/cm. A maximum in the photocurrent of PI(PMDA/ODA) is observed in Figure 5, however the optical density of PI(PMDA/ODA) below 350 nm is so large that the absorption of light is heterogeneous.…”

Section: Resultsmentioning

confidence: 99%

“…Organic photoconductors (OPCs) and photoconductive polymers have been widely studied for applying to xerographic photoreceptors of copies or printing machines. [1][2][3][4] The photoconductivity of Kapton polyimide films has been reported in the literature, which used UV [5], X-ray [6][7], and visible radiation [8][9][10][11] as the excitation sources. Although polyimides are well known for their high thermal stability, solvent insensitivity, and good dielectric characteristics, the low quantum efficiency in photocurrent generation has limited their use as photoconductors.…”

Section: Introductionmentioning

confidence: 99%

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Photoconductivity of Aliphatic Polyimide.

Lee

Yamashita

Horie

1996

J. Photopol. Sci. Technol.

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Photoconductivity of an aliphatic polyimide, PI(PMDA/DCHM), was investigated, comparing with that of an aromatic polyimide, PI(PMDA/ODA). An enhanced photocurrent was observed for the aliphatic polyimide. The quantum efficiency of the aliphatic polyimide and the aromatic polyimide was 2.1x10-5 at 370 nm, as 5.6x10-6 at 420 nm respectively, where the film thickness is 1.0 µ. Initial photoresponse behavior was observed to investigate the photoconductoon mechanism of the aliphatic polyimide, which shows a different behavior from the aromatic polyimide. The nature of the aliphatic polyimide film is investigated by using the model compounds. The emission spectra of the aliphatic polyimide shows the red-shifting with increasing of the excitation intensity, which indicates the existence of an aggregation of pyromellitic groups intra-and intermolecularly.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photoconductivity of Aliphatic Polyimide.

Lee

Yamashita

Horie

1996

J. Photopol. Sci. Technol.

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“…In the first step the absorbed photon excites the electron from its ground state to some excited bound state. The photoconduction studies made by SHARMA and PILLAI [6,71 in Kapton also indicate higher photogeneration efficiency by UV-radiation than visible light. The nature of depolarization characteristics in Kapton photoelectrets (Figs.…”

Section: Ptwtoelectret Statementioning

confidence: 85%

“…Kapton, whose conductivity has been found to be markedly affected by x-ray illumination [4, 51 and ultraviolet radiation [6] also shows good photo-conduction property in visible light [7]. One of the essential requirements for the photoelectret state to exist in a polymer is its photo-conductivity.…”

Section: Introductionmentioning

confidence: 99%

The photoelectret state in kapton polyimide film. II. The effect of intensity of illumination and the autophotoelectret state

Quamara¹,

Bhardwaj²,

Pillai

et al. 1983

Acta Polymerica

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The photoelectret state in Kapton polyimide film as a function of intensity of illumination has been investigated using visible light and ultraviolet radiation. Experiments were carried out both with as-received and heat treated Kapton samples. The photoelectret charge is observed to increase with the intensity of illumination tending towards saturation which is in accordance with the reciprocity law. The nature of decay curves shows the presence of shallow and deep trap levels in Kapton. Ultraviolet radiations were found more efficient for photopolarization than visible light. Heat treatment results in reduction of photoelectret: charge which: may: be; due t o the decrease in the number of traps owing to high temperature aging. The autophotoelectret state has also been investigated in Kapton. This study is useful for exploring the possibilities of using Kapton in electrophotographic process and solar energy conversion devices. Der Photoelektret-Zustand in Kapton(Po1yimid)-Filmen. 11. Der Einflup der lntensitat der Beleuchtung und der Autophotoelektret-ZustandDer Photoelektretzustand in Polyimidfilmen (Kapton) wurde in Abhangigkeit von der Intensitat der Beleuchtung mit sichtbarem und UV-Licht untersucht. Die Photoelektret-Ladung nimmt mit der Beleuchtungsintensitat zu und erreicht eine Sattigung in Ubereinstimmung mit dem Reziprozititatsgesetz. Die Zerfallskurven deuten auf die Existenz von flachen und tiefen Haftstellen (Traps) im Kapton hin. Ultraviolettstrahlung erwies sich hinsichtlich der Photopolarisation als wirksamer als sichtbares Licht. Warmebehandlung der Filme fuhrt zu einer Verringerung der Photoelektretladung, was auf einer Abnahme der Anzahl der Haftstellen beruhen kann. Weiter wurde der Autophotoelektretzustand im Kapton untersucht. Die Untersuchungen sind fur Anwendungen von Kapton in der Elektrophotographie und bei der Umwandlung von Solarenergie von Interesse. @omoa~ze~mpemnoe cocmomue e Kanmonoebix (nonuuwudmcx) nJzenKax. Vacmb I I . BJcumue unmencuenocmu oceetqenus u a e m o~o m o s~e~m p e m n o e cocmomme bfCCneAOBaH0 @OTO3JIeKTpeTHOe COCTORHHe B IIOJIAAMHnHbIX IIJIeHHaX (KBIITOH) B 3aBHCHMOCTH OT HHTeHCHBHOCTHOCBeIQeHHR C BAnHMbIM EI Ya)-CBeTOM. (DOT03neKTPeTHbIfi 3apfIn

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“…In situ and ex situ transmission X-ray experiments at low temperatures commonly use Kapton HN-type polyimide capillaries as sample holders because of their optical properties (Arakawa, 1981), X-ray photoconductivity (Weingart et al, 1972;Pillai & Sharma, 1979), resilience and low cost (Chupas et al, 2008). This poly(oxydiphenylene-pyromellitimide) polyimide ( Fig.…”

Section: Introductionmentioning

confidence: 99%

Effect of using polyimide capillaries during thermal experiments on the particle size distribution of supported Pt nanoparticles

2015

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Kapton HN‐type polyimide capillaries are commonly used as sample holders for transmission X‐ray experiments at temperatures below 673 K because of their thermal stability, high X‐ray transmittance and low cost. Using high‐angle annular dark field scanning high‐resolution transmission electron microscopy and thermogravimetric analysis, this work shows that using polyimide capillaries leads to the overgrowth of supported Pt nanoparticles during reduction at temperatures below the glass transition temperature (Tg = 658 K) owing to an outgassing of water from the polyimide. Quartz capillaries were also studied and this overgrowth was not observed.

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Field dependence of photoconduction in Kapton polyimide film

Cited by 30 publications

References 6 publications

Photoconductivity of Aliphatic Polyimide.

Photoconductivity of Aliphatic Polyimide.

The photoelectret state in kapton polyimide film. II. The effect of intensity of illumination and the autophotoelectret state

Effect of using polyimide capillaries during thermal experiments on the particle size distribution of supported Pt nanoparticles

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