Article

Dark Current Mechanism in Bulk GaInNAs Lattice Matched to GaAs

Dept. of Electron. & Electr. Eng., Univ. of Sheffield, Sheffield, UK
IEEE Transactions on Electron Devices (impact factor: 2.32). 02/2011; DOI:10.1109/TED.2010.2086061 pp.103 - 106
Source: IEEE Xplore

ABSTRACT The reverse-bias current-voltage characteristics of a series of Ga1-xlnxNyAs1-y diodes with bandgap of between 0.87 and 1.04 eV are reported. At low bias, diffusion and generation-recombination currents are dominant at high and low temperatures, respectively. At high reverse bias, the dark current is insensitive to changes in temperature, which is indicative of tunneling current mechanisms. We also observe an exponential dependence of the dark current with the electric field in the mid-bias range for all our diodes, which may be explained by the Poole-Frenkel effect.

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Keywords

bandgap
 
electric field
 
low bias
 
low temperatures
 
mid-bias range
 
reverse bias
 
reverse-bias current-voltage characteristics
 
tunneling current mechanisms
 

L.J.J. Tan