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A two-dimensional model for an in-plane organic photo-conductive bilayer sensor

Wouter Woestenborghs (UGent) , Patrick De Visschere (UGent) , Filip Beunis (UGent) and Kristiaan Neyts (UGent)
Author
Organization
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TARDIS II
Abstract
In this work we present a two-dimensional (2D) model for an organic thin film photo-conductive sensor containing a planar heterojunction and in-plane electrodes. The model simulates the flow of charge carriers based on the standard one-dimensional semiconductor transport and continuity equations, and combines this with a 2D model for the electric field. This procedure results in a hybrid differential/integral equation formulation. We present and analyse simulation results that resemble very well measured current–voltage characteristics of a real sensor under different illumination levels. We find that for currents below a critical value the sensor behaves like a resistor. Above this critical current the current increases much more slowly due to space charge accumulation close to the cathode. We explain the critical current as the maximum reverse current of the solar cell formed by the heterojunction covering the cathodic electrode.
Keywords
TRANSPORT, DEVICES, INTERFACE, HETEROJUNCTION, SEMICONDUCTOR, SIMULATION, LAYER, organic electronics, photoconductor, PTCBI, simulation

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Citation

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MLA
Woestenborghs, Wouter, Patrick De Visschere, Filip Beunis, et al. “A Two-dimensional Model for an In-plane Organic Photo-conductive Bilayer Sensor.” Ed. Taylor Bailey & David Bowden. JOURNAL OF PHYSICS D-APPLIED PHYSICS 47.35 (2014): n. pag. Print.
APA
Woestenborghs, W., De Visschere, P., Beunis, F., & Neyts, K. (2014). A two-dimensional model for an in-plane organic photo-conductive bilayer sensor. (T. Bailey & D. Bowden, Eds.)JOURNAL OF PHYSICS D-APPLIED PHYSICS, 47(35).
Chicago author-date
Woestenborghs, Wouter, Patrick De Visschere, Filip Beunis, and Kristiaan Neyts. 2014. “A Two-dimensional Model for an In-plane Organic Photo-conductive Bilayer Sensor.” Ed. Taylor Bailey and David Bowden. Journal of Physics D-applied Physics 47 (35).
Chicago author-date (all authors)
Woestenborghs, Wouter, Patrick De Visschere, Filip Beunis, and Kristiaan Neyts. 2014. “A Two-dimensional Model for an In-plane Organic Photo-conductive Bilayer Sensor.” Ed. Taylor Bailey and David Bowden. Journal of Physics D-applied Physics 47 (35).
Vancouver
1.
Woestenborghs W, De Visschere P, Beunis F, Neyts K. A two-dimensional model for an in-plane organic photo-conductive bilayer sensor. Bailey T, Bowden D, editors. JOURNAL OF PHYSICS D-APPLIED PHYSICS. 2014;47(35).
IEEE
[1]
W. Woestenborghs, P. De Visschere, F. Beunis, and K. Neyts, “A two-dimensional model for an in-plane organic photo-conductive bilayer sensor,” JOURNAL OF PHYSICS D-APPLIED PHYSICS, vol. 47, no. 35, 2014.
@article{5673810,
  abstract     = {In this work we present a two-dimensional (2D) model for an organic thin film photo-conductive sensor containing a planar heterojunction and in-plane electrodes. The model simulates the flow of charge carriers based on the standard one-dimensional semiconductor transport and continuity equations, and combines this with a 2D model for the electric field. This procedure results in a hybrid differential/integral equation formulation. We present and analyse simulation results that resemble very well measured current–voltage characteristics of a real sensor under different illumination levels. We find that for currents below a critical value the sensor behaves like a resistor. Above this critical current the current increases much more slowly due to space charge accumulation close to the cathode. We explain the critical current as the maximum reverse current of the solar cell formed by the heterojunction covering the cathodic electrode.},
  articleno    = {355103},
  author       = {Woestenborghs, Wouter and De Visschere, Patrick and Beunis, Filip and Neyts, Kristiaan},
  editor       = {Bailey, Taylor and Bowden, David},
  issn         = {0022-3727},
  journal      = {JOURNAL OF PHYSICS D-APPLIED PHYSICS},
  keywords     = {TRANSPORT,DEVICES,INTERFACE,HETEROJUNCTION,SEMICONDUCTOR,SIMULATION,LAYER,organic electronics,photoconductor,PTCBI,simulation},
  language     = {eng},
  number       = {35},
  pages        = {10},
  title        = {A two-dimensional model for an in-plane organic photo-conductive bilayer sensor},
  url          = {http://dx.doi.org/10.1088/0022-3727/47/35/355103},
  volume       = {47},
  year         = {2014},
}

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