Structural and optical properties of pure ZnO and Al/Cu co-doped ZnO semiconductor thin films and electrical characterization of photodiodes
Küçük Resim Yok
Tarih
2021
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Walter de Gruyter GmbH
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Nano-structured semiconductor thin films and p-type Si photodiodes were fabricated with the sol-gel spin coating technique using pure ZnO and co-doped ZnO:Alx:Cuy with x = 1 at.-%, y = 1, 2, 3, 5 at.-%. The structural and optical properties of thin films were examined using an XRD and a UV-spectrophotometer. The thin films have a hexagonal wurtzite crystal structure, and their optical band gap energies decrease with increasing Cu contribution. The electrical properties of photodiodes were assessed via I-V, C-V, (G/?)-V and phototransient current (I-t, C-t) measurements. The ?b(I-V), experimental zero-bias barrier height, rectification ratio, ideality factor and Ion/Ioff parameters of the diodes were calculated using thermoionic emission model. In addition, ?b(C-V), barrier height, Vbi, built-in voltage, Vd, diffusion potential, Nd, donor concentration and Wd, depletion layer width of p-Si/ZnO:Alx:Cuy (x = 1 at.-%, y = 1 at.-%.) photodiodes were obtained using a C-2-V graph plotted at 1 MHz frequency.The photodiodes exhibit rectifying and photosensitive behaviors, and their reverse bias current increases with increasing light intensity. These results indicate that produced diodes can be employed as photodiodes or photosensors in optoelectronic circuits and electronic devices. © 2021 Walter de Gruyter GmbH, Berlin/Boston, Germany.
Açıklama
Anahtar Kelimeler
Nanostructure, Optical properties, Photodiode, Semiconductors, Sol-gel, ZnO, Aluminum compounds, Copper compounds, Crystal structure, Energy gap, II-VI semiconductors, Light sensitive materials, Magnetic semiconductors, Optical films, Oxide semiconductors, Photodiodes, Photosensitivity, Semiconducting films, Semiconducting zinc compounds, Sol-gel process, Sol-gels, Thin films, Wide band gap semiconductors, Zinc oxide, Zinc sulfide, Barrier heights, Co-doped ZnO, Electrical characterization, Nano-structured, Pure Al, Pure ZnO, Semiconductors thin films, Sol'gel, Structural and optical properties, Thin films characterization, Nanostructures
Kaynak
Materialpruefung/Materials Testing
WoS Q Değeri
Scopus Q Değeri
Q2
Cilt
63
Sayı
3
