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Electrical characterizations of Au ZnO n GaAs Schottky diodes under distinct illumination intensities      
Yazarlar
Serhat Orkun Tan
Karabük Üniversitesi, Türkiye
Habibe Uslu
Karabük Üniversitesi, Türkiye
Doç. Dr. Osman ÇİÇEK Doç. Dr. Osman ÇİÇEK
Kastamonu Üniversitesi, Türkiye
Hüseyin Tecimer
Karabük Üniversitesi, Türkiye
İkram Orak
Bingöl Üniversitesi, Türkiye
Şemsettin Altındal
Gazi Üniversitesi, Türkiye
Özet
The Au/ZnO/n-GaAs Schottky barrier diode was fabricated and examined regarding to its current–voltage characteristics under distinct illumination intensities at room temperature. The reverse biased current increases with increasing illumination level while forward biased current is almost unchanged with illumination which states that the fabricated diodes exhibit photosensitive character or photodiode behavior. Hence, the shunt resistance is decreased with illumination while the series resistance is almost remained constant. The increment in the ideality factor after illumination can be ascribed to the assumption of inhomogeneities at M/S interface. Considering the ideality factor and the voltage dependent effective barrier height, the energy distribution profiles of surface states (Nss) were formed by the forward bias current–voltage data and increased with increasing illumination level. The Nss values acquired by considering series resistance are lower than those acquired by ignoring series resistance. Consequently, surface states can serve as recombination centers and have great importance especially in reverse bias current–voltage characteristics.
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Dergi ISSN 0957-4522
Dergi Tarandığı Indeksler SCI
Makale Dili İngilizce
Basım Tarihi 08-2016
Cilt No 27
Sayı 8
Sayfalar 8340 / 8347
Doi Numarası 10.1007/s10854-016-4843-4
Makale Linki http://link.springer.com/10.1007/s10854-016-4843-4