Annealing time effect on the optical properties of Zn(O,OH,S) films onto ZnO seed layer under un-vacuum ambient

Yıl 2018, Cilt: 22 Sayı: 6, 1704 - 1710, 01.12.2018

Fatma Özütok , Emin Yakar

https://doi.org/10.16984/saufenbilder.349758

Öz

In this study, Zn (O,OH,S) films were synthesized onto ZnO seed layers by chemical bath deposition, which were annealed at 500 °C. The differences of structural, morphological and detailed optical properties of the films were investigated depending on the annealing time (between 30 min. and 90 min.). While samples of 30.min and 90 min. showed decomposed structures, sample of 60 min. showed different dimensions of nano-flower structures. Although all films had ZnO-hexzagonal crystal structure, the most obvious ZnS-related peaks were observed in the sample of 90 min. Optical absorption edge was shifted at 362 nm from Uv-Vis spectroscopy. Although ZnO, Zn(OH)2 vibration related peaks were so sharp, ZnS vibration peaks were so weak for all samples from FTIR. The PL intensities were differential depending on the annealing time but defect state-corresponding peaks were similar for each films.

Anahtar Kelimeler

ZnO seed layer, photoluminescence spectroscopy, FTIR, film characterization

Annealing Time Effect on the Optical Properties of Zn(O,OH,S) Films onto ZnO Seed Layer Under Un-vacuum Ambient

Öz

In this study, Zn (O,OH,S) films were
synthesized onto ZnO seed layersby chemical bath deposition,
annealed at 500 °C. The differences of
structural, morphological and detailed optical properties of the films were
investigated depending on the annealing time (between 30 min. and 90 min.).
While samples of 30.min and 90 min. showed decomposed structures, sample of 60
min. showed different dimensions of nano-flower structures. Although all films
have ZnO-hexzagonal crystal structure, the most obvious ZnS-related peaks were
observed in sample of 90 min. Optical absorption edge is shifted at 362 nm from
Uv-Vis spectroscopy. Although ZnO, Zn(OH)₂ vibration related peaks
are so sharp, ZnS vibration peaks are so weak for all samples from FTIR. The PL
intensities are differential with the annealing time but defect
state-corresponding peaks are similar for each films.

Anahtar Kelimeler

Zn(O, OH, S) film, ZnO seed layer, photoluminescence spectroscopy, FTIR

Kaynakça

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