Karakterisasi Sifat Optik Fase Film TiO2 Berbasis Reflektansi Menggunakan Visible Spectrometer

Pupriandari, Siska Ariani (2025) Karakterisasi Sifat Optik Fase Film TiO2 Berbasis Reflektansi Menggunakan Visible Spectrometer. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Titanium dioksida (TiO2) merupakan material semikonduktor yang memiliki sifat optik unggul dan banyak diaplikasikan dalam teknologi optik. Salah satu parameter optik penting dari TiO2 adalah indeks bias, yang bergantung pada struktur kristal (fase) dan metode fabrikasi. Penelitian ini mengkarakterisasi sifat optik film TiO2 dengan variasi fase kristal (anatase, rutile, rutile-anatase, dan rutile-brookite) yang dideposisi menggunakan metode spray pyrolysis. Film difabrikasi pada substrat kaca dengan ketebalan 2,772 µm yang dikonfirmasi melalui SEM. Karakterisasi optik dilakukan menggunakan visible spectrometer berbasis reflektansi dalam rentang panjang gelombang 400–800 nm untuk menganalisis sifat reflektansi dan absorbansi. Hasil menunjukkan bahwa fase rutile-anatase memiliki reflektansi tertinggi (5,741% pada λ = 410 nm) dan absorbansi terendah, sedangkan fase anatase menunjukkan absorbansi tertinggi (1,55% pada λ = 655 nm) dan reflektansi terendah. Berdasarkan data reflektansi dan absorbansi, indeks bias dihitung menggunakan pendekatan teori Fresnel. Nilai indeks bias tertinggi diperoleh pada fase rutile-anatase (1,631 pada λ = 410 nm), diikuti oleh rutile-brookite (1,623), rutile (1,598), dan anatase (1,561), dengan indeks bias menurun seiring peningkatan panjang gelombang (dispersi optik). Analisis sifat optik mengindikasikan bahwa fase anatase memiliki kemampuan terbaik dalam menyerap cahaya dan menghantarkan muatan, sementara fase rutile-anatase lebih unggul dalam aplikasi heat-resistant glass akibat reflektansinya yang tinggi.
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Titanium dioxide (TiO2) is a semiconductor with superior optical properties that is widely used in optical technology. An important optical parameter of TiO2 is its refractive index, which depends on its crystal structure (phase) and fabrication method. This study characterizes the optical properties of TiO2 films with different crystal phases (anatase, rutile, rutile-anatase and rutile-brookite) that were deposited using spray pyrolysis. The film was fabricated on a glass substrate with a thickness of 2.772 µm, as confirmed through SEM. Reflectance and absorbance properties were analyzed using a reflectance-based visible spectrometer in the wavelength range of 400–800 nm. The results indicate that the rutile-anatase phase exhibits the highest reflectance (5.741% at λ = 410 nm) and the lowest absorbance. In contrast, the anatase phase exhibited the highest absorbance (1.55% at λ = 655 nm) and the lowest reflectance. Based on the reflectance and absorbance data, the refractive index was calculated using the Fresnel theory approach. The highest refractive index value was obtained in the rutile-anatase phase (1.631 at λ = 410 nm), followed by rutile-brookite (1.623), rutile (1.598), and anatase (1.561), with a decreasing trend as the wavelength increases (optical dispersion). Optical properties analysis indicates that the anatase phase has the best ability to absorb light and conduct charge, while the rutile-anatase phase is superior in heat-resistant application.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Indeks Bias, Film TiO2, Reflektansi, Sifat Optik, Visible Spectrometer
Subjects:	Q Science > QC Physics > QC100 Crystals. Q Science > QC Physics > QC451 Spectroscopy
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Siska Ariani Pupriandari
Date Deposited:	21 Jul 2025 01:22
Last Modified:	21 Jul 2025 01:22
URI:	http://repository.its.ac.id/id/eprint/120154

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