Effect of lanthanum substrates on the structural, optical and electrical properties of copper selenide thin films designed for 5G technologies
Yükleniyor...
Dosyalar
Tarih
2022
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Link
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this work, copper selenide thin films coated onto glass and transparent lanthanum substrates are studied. The (glass, La)/CuSe thin films which are prepared by the thermal evaporation technique under a vacuum pressure of 10?5 mbar are structurally, morphologically, optically, dielectrically and electrically characterized. Lanthanum substrates improved the crystallinity by increasing the crystallite size and decreasing both of the microstrains and defect density of copper selenide. La substrates redshifts the energy band gap and doubled the dielectric constant values. In addition, employing Drude–Lorentz approaches for optical conduction to fit the dielectric constant provided information about the effects of La substrates on the drift mobility, plasmon frequency, free carrier density and scattering times at femtosecond level. The drift mobility increased and the plasmon frequency range is modified when La substrates are used. Verifying impedance spectroscopy tests in the microwave frequency domain have shown the ability of the La(gate)/CuSe/Ag (source) transistors performing as band pass filters. These filters are suitable for 5G technologies. The microwave cutoff frequency reached ~ 5.0 GHz at a notch frequency of 2.80 GHz of the glass/La/CuSe/Ag highpass filters.
Açıklama
Anahtar Kelimeler
Glass/La/CuSe Interfaces, Thin Film Transistor, Optical Conductions, Microwave Resonators
Kaynak
Optical and Quantum Electronics
WoS Q Değeri
Q3
Scopus Q Değeri
N/A
Cilt
54
Sayı
4
Künye
Qasrawi, A.F., Ghannam, A.N.A. Effect of lanthanum substrates on the structural, optical and electrical properties of copper selenide thin films designed for 5G technologies. Opt Quant Electron 54, 4 (2022).
