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Electrical transport studies of MBE grown InGaN/Si isotype heterojunctions
Mahesh Kumar,Basanta Roul,Mohana K. Rajpalke,Thirumaleshwara N. Bhat,A.T. Kalghatgi,S.B. Krupanidhi 한국물리학회 2013 Current Applied Physics Vol.13 No.1
The temperature dependent electrical transport behavior of nen InGaN/Si heterostructures grown by plasma-assisted MBE was studied. Structural characteristics of the as-grown InGaN epilayers were evaluated high resolution X-ray diffraction and composition of InGaN was estimated from photoluminescence spectra using standard Vegard’s law. Current densityevoltage plots (JeVeT) revealed that the ideality factor (h) and Schottky barrier height (SBH) (Fb) are temperature dependent and the incorrect values of the Richardson’s constant (A**) produced, suggests an inhomogeneous barrier at the heterostructure interface. The higher value of the ideality factor compared to the ideal value and its temperature dependence suggest that the current transport is mainly dominated by thermionic field emission.