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Title: A different approach to solar cell simulation

Highlights: • A new simulation program has been developed and operated for the Au/n-GaN device. • Device inhomogeneity is introduced to program via fluctuation factor term. • The barrier height fluctuation factor strongly affects the device characteristics. - Abstract: Zero barrier height inhomogeneity in the device is generally assumed to conform to Gaussian distribution in the literature. In this study, zero barrier height inhomogeneity has been adopted to obey random distribution. Cell was divided into elementary diodes, which were connected in parallel to each other. The current–voltage characteristics of the cell were obtained by developed device modeling program for various zero barrier height inhomogeneity levels at room temperature in dark and under light conditions. The cell parameters were then calculated by using simulated current–voltage data. It is displayed that increase in zero barrier height inhomogeneity results in Schottky barrier height enhancement and decrease in the diode factor of the cell. Fill factor and V{sub oc} values showed a decreasing trend with increasing zero barrier height inhomogeneity. Also, random distribution of zero barrier height effect on interface state density was examined. Interface state density increases with increasing zero barrier height inhomogeneity.
Authors:
 [1] ;  [2] ;  [1] ;  [2] ;  [3]
  1. Mugla Sitki Kocman University, Faculty of Sciences, Department of Physics, 48000, Mugla (Turkey)
  2. (Turkey)
  3. Mugla Vocational School, Department of Electric and Energy, 48000, Mugla (Turkey)
Publication Date:
OSTI Identifier:
22475966
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DENSITY; DIFFUSION BARRIERS; DISTRIBUTION; FLUCTUATIONS; GALLIUM NITRIDES; GAUSS FUNCTION; GOLD; N-TYPE CONDUCTORS; RANDOMNESS; SIMULATION; SOLAR CELLS; TEMPERATURE RANGE 0273-0400 K; VISIBLE RADIATION