The Bridge - Issue 2, 2021 - 19

Feature
Modeling of organic semiconductor conduction parameters
with reference to inorganic semiconductors
REFERENCES
And
The continuity equation for holes in one dimension
can be written as:
[1] Zekry, A., Shaker, A., Salem, M., 2018. Chapter 1 - solar cells and
arrays: principles, analysis, and design, Advances in Renewable Energies
and Power Technologies, first ed., Yahyaoui.
Where p is the hole concentration, Jp
current density, p0
equilibrium, τp
is the hole
is the hole concentration at thermal
is the hole lifetime and ge
generation rate that may be affected by suitable
incident photon flux.
A similar continuity equation can be written
for electrons:
is the external
[2] Eric F.V. Scriven and Christopher A. Ramsden, " Chapter Five -
Heterocyclic Building Blocks for Organic Semiconductors " , Advances in
Heterocyclic Chemistry, vol. 121, pp. 133 - 171, 2017.
[3] Gryn'ova G, Lin KH, Corminboeuf C., " Read Between the Molecules:
Computational Insights into Organic Semiconductors " , J. Am Chem. Soc.,
vol. 48, pp. 16370-16386, Nov. 2018.
[4] Jin-Peng Yang et al, " Origin and role of gap states in organic
semiconductor studied by UPS: as the nature of organic molecular
crystal " , J. Phys. D: Appl. Phys, vol. 50, pp. 423002, Oct. 2017.
[5] Abdelhalim zekry, " Electronic devices with physical insight " , LAP
LAMBERT Academic Publishing, 2019, 272 pages.
[6] Lüssem, B., Riede, M. and Leo, K., " Doping of organic
semiconductors " , Phys. Status Solidi A, vol. 210, pp. 9-43, Dec. 2012.
[7] Mandoc, Maria Magdalena, " Device physics of all-polymer solar cells " ,
s.n., 134 p, 2009.
[8] Holst, van der, J. J. M., Oost, van, F. W. A., Coehoorn, R., & Bobbert, P.
A., " Electron-hole recombination in disordered organic semiconductors :
validity of the Langevin formula " , Physical Review B, vol. 23, pp. 2352021/8,
2009.
Where, Jn
is the electron current density, τn
lifetime of electrons n0
is the carrier
is the electron concentration
at equilibrium. These equations can be formulated
in three dimensional forms. One simply uses napla
operator for time rate of change of the carriers and
the gradient one uses the div operator.
Conclusions
In this paper we showed clearly that one can
assign the same material parameters to inorganic
semiconductors as organic semiconductor materials.
One can assign for them, an effective mass, a
mobility, a diffusivity, an energy gap, a Fermi level,
doping concentrations as well as same recombination
mechanisms. The major differences are in the
numerical values of these parameters. In addition,
there may be additional recombination mechanisms
because of the very low mobile carrier mobilities in
organic materials.
The most important conclusion is that one can use the
same simulators intended for the inorganic devices
to the organic semiconductor devices. This will save
tremendous efforts to develop new simulators for the
organic semiconductor devices.
Abdelhalim Zekry is a professor
of electronics at the Faculty of
Engineering, Ain Shams University,
Egypt. He has worked as a staff
member at several universities.
He has published more than 300
papers. He also has supervised
more than 110 Master's theses
and 40 Doctoral Dissertations.
Prof. Zekry focuses his research programs on the field
of microelectronics and electronic applications including
communications and photovoltaics.
He has been awarded several prizes for his outstanding
research and teaching performance.
Walaa Abdelaziz is a teaching
assistant at the Modern Academy,
Egypt. She graduated from Ain
Shames University in 2005 and
earned her Master's degree in 2012
from Cairo University. She focuses
her research on renewable energy,
especially solar cells.
HKN.ORG
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https://hkn.ieee.org/ https://hkn.ieee.org/
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