Effects of SeO2 epilayer on the structural, morphological, optical and dielectric properties of nanocrystalline ZnSe thin films

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Küçük Resim

Tarih

2022

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Elsevier

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Herein the effects of SeO2 coating on the physical properties of thermally evaporated nanocrystalline (NC) ZnSe thin film substrates are explored. The formed ZnSe films showed nanocrystalline Zincblende phase. They contained excess selenium (ZnSe1.07) with relatively large defect density and displayed band gap of value of 3.48?eV, energy band tails of width of 1.2?eV and dielectric quality factor () less than 100. Coating NC-ZnSe with SeO2 induced the crystallization of tetragonal SeO2 and enhanced the light absorbability of SeO2. It also reduced the defect density and stacking faults, increased the crystallites sizes, narrowed the width of band tails, increased the dielectric constant and increase the factor up to ?400 of NC-ZnSe. In addition, analysis of the optical conductivity spectra for the NC-ZnSe/SeO2 bilayers has shown that the drift mobility, plasmon frequency and free carrier density can reach values of 30.42?cm2/Vs, 5.07?GHz and 8.0? cm?3, respectively.

Açıklama

Anahtar Kelimeler

NC-ZnSe/SeO2, Band Offset, Induced Crystallization, Dielectric, Optical Receiver

Kaynak

Physica B: Physics of Condensed Matter

WoS Q Değeri

Q3

Scopus Q Değeri

Q2

Cilt

Sayı

Künye

Qasrawi, A.F., Sulaimana, S. K. (2022). Effects of SeO2 epilayer on the structural, morphological, optical and dielectric properties of nanocrystalline ZnSe thin films. Physica B: Physics of Condensed Matter.