Modelling the effects of field-dependent quantum efficiency in organic semiconductor Schottky barrier solar cells

Whitlock, Jonathan B.; Panayotatos, P.

doi:10.1016/0040-6090(91)90473-b

Cited by 12 publications

(4 citation statements)

References 16 publications

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“…In organic semiconductors, metal phthalocyanines, reported as p type, have recently drawn increasing attention due to their potential application in gas sensing [5][6][7][8][9] and photovoltaic devices. [10][11][12][13][14] Currently, there is much research aimed at the development of efficient low cost photovoltaic energy conversion, guided by the quest for organic semiconductor materials in the form of sandwich devices. Among metal phthalocyanines, zinc phthalocyanine ͑ZnPc͒, a well-known organic semiconductor with a large absorption coefficient 4,15 and high thermal and photochemical stabilities, 4 is a potential candidate for photovoltaic applications.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and ac conduction properties of zinc phthalocyanine (ZnPc) thin films

Ramakrishnan¹,

Ascencio

Lee

et al. 2007

Journal of Applied Physics

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The dielectric responses of zinc phthalocyanine (ZnPc) thin films, deposited using the vacuum evaporation technique, were studied as functions of frequency and temperature. The conductivity of the deposited films decreases with increase in temperature. The dielectric studies clearly indicated that the Debye type of polarization exists in these films. The relaxation phenomena have been confirmed from the Cole-Cole plot. The relaxation times have been evaluated from the plot and were found to be (τa) 0.0137 and 0.0106s at 303 and 403K, respectively. The prevailing conduction mechanism in ZnPc films, under an ac field, was found to be electronic hopping. The activation energy was evaluated from the Arrhenius plot and was found to be 1.28eV. Based on the structure, and with the help of quantum mechanics calculations, the electronic structure and behavior that upheld our experimental results were identified.

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Section: Introductionmentioning

confidence: 99%

Dielectric and ac conduction properties of zinc phthalocyanine (ZnPc) thin films

Ramakrishnan¹,

Ascencio

Lee

et al. 2007

Journal of Applied Physics

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“…Since the establishment of semiconduction in phthalocyanines originating with the work of Eby on metal-free phthalocyanine and extension to Copper Phthalocyanine (CuPc) and Magnesium Phthalocyanine (MgPc) by Vartanyan, there has been considerable interest in these materials, related to a variety of possible device fabrications. 1 They are used as gas sensors, [2][3][4][5] photovoltaic and solar cells, [6][7][8][9][10] dyes in paint and textile industry, 11 and opto-electronic devices. 12 Recently superlattices consisting of organic multilayers have been demonstrated in some combinations of organic materials.…”

Section: Introduction Ntroductionmentioning

confidence: 99%

Studies on the Electrical and Optical Properties of Magnesium Phthalocyanine Thin Films

Gopinathan

Menon

2004

Journal of Chemistry

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Thin films of Magnesium Phthalocyanine (MgPc) are prepared by thermal evaporation technique at a base pressure of 10 -5 m.bar on thoroughly cleaned glass substrates kept at different constant temperatures. Films of thickness 2400 A.U. coated at room temperature are subjected to post deposition annealing in air by keeping them in a furnace at different constant temperatures, for one hour. The electrical conductivity studies are conducted in the temperature range 300 K to 525 K. The electrical conductivity is plotted as a function of absolute temperature. The conduction mechanism is observed to be hopping. The thermal activation energy is calculated in different cases and is observed to vary with substrate temperature and annealing temperature. A phase change is observed due to post-deposition annealing at around 523 K. The optical absorption studies are done in the UV-Visible region. The optical band gap energies of the samples are calculated.

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“…The electrical properties of metal-phthalocyanines have shown increasing importance in recent years, particularly in relation to the development of metal phthalocyanines (MPc's) thin film gas sensors [1][2][3] and photovoltaic devices [4][5][6][7]. The d.c conductivity in phthalocyanine compounds has received intensive investigation in the form of thin films [8,9], but there have only been a few reports on their a.c. conduction properties [10].…”

Section: Introductionmentioning

confidence: 99%

A.c. electrical properties of Au/CIAIPc/Au device

Sharma

1995

J Mater Sci: Mater Electron

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The a.c. electrical properties of chloro aluminum phthalocyanine (CIAIPc) thin film sandwiched between two gold (Au) electrodes have been studied in the frequency range 10 Hz to 100 kHz and the temperature range 293K to 400K. The a.c. conductivity c~(c0) was found to vary as ~o s, with the index s < 1, indicating that a hopping process of conduction is dominant at low temperatures and higher frequencies. At higher temperatures and lower frequencies a free carrier conduction mechanism is likely to dominate. At low temperatures the capacitance of the Au-CIAIPc-Au device is temperature-insensitive and increases rapidly above 300 K. The capacitance and loss tangent decreased with frequency and increased with temperature. Such characteristics were found to be in good agreement with the devices

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Modelling the effects of field-dependent quantum efficiency in organic semiconductor Schottky barrier solar cells

Cited by 12 publications

References 16 publications

Dielectric and ac conduction properties of zinc phthalocyanine (ZnPc) thin films

Dielectric and ac conduction properties of zinc phthalocyanine (ZnPc) thin films

Studies on the Electrical and Optical Properties of Magnesium Phthalocyanine Thin Films

A.c. electrical properties of Au/CIAIPc/Au device

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