Pengaruh Lapisan Penyangga SnO2 dan ZnO Terhadap Sifat Optik Lapisan Tipis TiO2

Authors

  • Nora Zenestry Jaslia Jurusan Fisika Universitas Andalas
  • Astuti Astuti Jurusan Fisika Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.6.1.33-38.2017

Abstract

Lapisan tipis TiO2, TiO2;ZnO, dan TiO2;SnO2 telah dideposisikan di atas kaca preparat dengan menggunakan metode spin coating. Serbuk SnO2 dibuat dengan melarutkan serbuk Sn dengan amonium hidroksida dan asam klorida. Larutan SnO2 dibuat dari serbuk SnO2 dengan mencampurkan larutan isopropanol dan etanol kemudian ditambahkan asam asetat. Larutan TiO2 dan ZnO dibuat dari serbuk TiO2 dan ZnO dengan mencampurkan monoethanolamine dan isopropanol. Larutan ZnO dan SnO2sebagai lapisan pertama dideposisikan terlebih dahulu diatas substrat kaca kemudian dilanjutkan larutan TiO2, dengan kecepatan yang sama yaitu 2500 rpm dan dikeringkan selama 30 menit pada temperatur 80 ËšC. Karakterisasi struktur kristal dan sifat optik (absorbsi dan energi gap) lapisan TiO2, TiO2;ZnO dan TiO2;SnO2 menggunakan XRD dan Spektrofotometer UV-Vis. Hasil perhitungan menunjukkan bahwa ukuran kristal dari ketiga sampel memilikiperbedaan yaitu TiO2 sebesar 63,64 nm, TiO2;ZnO sebesar 53,02 nm dan TiO2;SnO2 sebesar 79,08 yang dipengaruhi oleh pelarut. Penambahan lapisan penyangga menyebabkan energi gap mengalami penurunandimana sebelum penambahan lapisan penyangga energi gap TiO2 sebesar sebesar 3,2 eV, setelah penambahan lapisan penyangga energi gapmengalami penurunan yaitu 2,85 eV (TiO2;ZnO), dan (TiO2;SnO2) 3 eV.

 

Kata kunci: energi gap, spin coating, TiO2, ZnO, SnO2, ukuran kristal,

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Published

2017-01-05

Issue

Vol. 6 No. 1 (2017)

Section

Articles

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Copyright (c) 2017 Nora Zenestry Jaslia, Astuti Astuti

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