Pengaruh Struktur dan Ukuran Partikel TiO2 terhadap Sifat Optoelektronik sebagai Lapisan Transport Elektron dalam Sel Surya Perovskit

A'yun, Lely Qurrota (2026) Pengaruh Struktur dan Ukuran Partikel TiO2 terhadap Sifat Optoelektronik sebagai Lapisan Transport Elektron dalam Sel Surya Perovskit. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Titanium dioksida (TiO₂) merupakan salah satu material yang banyak digunakan sebagai lapisan transport elektron (ETL) pada sel surya perovskit karena memiliki kesesuaian tingkat energi dengan material perovskit, stabilitas kimia dan termal yang baik, serta celah pita yang lebar. Dalam penelitian ini, nanopartikel TiO₂ disintesis menggunakan metode kopresipitasi dengan variasi pH sintesis (9 dan 10), suhu kalsinasi (350°C dan 450°C), dan waktu kalsinasi (2 dan 4 jam). Karakterisasi dilakukan menggunakan X-Ray Diffraction (XRD) dengan Rietveld refinement, Particle Size Analyzer (PSA), spektrofotometer UV-Vis, dan spektroskopi fotoluminesensi (PL). Hasil penelitian menunjukkan bahwa seluruh sampel mempertahankan fase anatase tunggal dengan struktur kristal tetragonal. Peningkatan pH sintesis menghasilkan ukuran kristalit dan ukuran partikel yang lebih besar akibat percepatan laju hidrolisis dan kondensasi prekursor titanium disertai peningkatan aglomerasi partikel, sedangkan peningkatan suhu dan waktu kalsinasi menyebabkan pertumbuhan kristalit dan memperbaiki distribusi ukuran partikel melalui dehidroksilasi permukaan. Nilai energi celah pita seluruh sampel berada pada rentang 3,10-3,24 eV yang masih sesuai dengan rentang nilai bulk anatase sebesar 3,0-3,2 eV. Aglomerasi yang lebih tinggi menyebabkan penurunan intensitas absorbansi akibat hamburan cahaya, sedangkan peningkatan kristalinitas memengaruhi absorbansi melalui perubahan jumlah cacat struktural. Intensitas PL yang lebih rendah pada suhu kalsinasi yang lebih tinggi menunjukkan berkurangnya cacat struktural yang berpotensi mendukung efisiensi transport elektron sebagai ETL sel surya perovskit.
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Titanium dioxide (TiO₂) is one of the materials that is widely used as an electron transport layer (ETL) in perovskite solar cells because it has a suitable energy level with the perovskite material, good chemical and thermal stability, and a wide band gap. In this study, TiO₂ nanoparticles were synthesized using a coprecipitation method with variations in synthesis pH (9 and 10), calcination temperature (350°C and 450°C), and calcination time (2 and 4 hours). Characterization was carried out using X-Ray Diffraction (XRD) with Rietveld refinement, Particle Size Analyzer (PSA), UV-Vis spectrophotometer, and photoluminescence spectroscopy (PL). The results showed that the entire sample maintained a single anatase phase with a tetragonal crystal structure. Increased pH of synthesis results in greater crystallite size and particle size due to accelerated hydrolysis rates and condensation of titanium precursors accompanied by increased particle agglomeration, while increased temperature and calcination time lead to crystallite growth and improve particle size distribution through surface dehydroxylation. The energy value of the entire band gap is in the range of 3.10-3.24 eV which is still in accordance with the range of bulk anatase value of 3.0-3.2 eV. Higher agglomeration leads to a decrease in absorbance intensity due to light scattering, while increased crystallinity affects absorbance through changes in the number of structural defects. Lower PL intensities at higher calcination temperatures indicate reduced structural defects that could potentially support electron transport efficiency as perovskite solar cell ETLs.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	TiO₂, ETL, Sel Surya Perovskit, Energi Celah Pita, Ukuran Kristalit ======================================================================================================================== TiO₂, ETL, Perovskite Solar Cells, Band Gap Energy, Crystallite Size
Subjects:	Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC451 Spectroscopy Q Science > QD Chemistry > QD117 Absorption
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Lely Qurrota A'yun
Date Deposited:	01 Aug 2026 02:24
Last Modified:	01 Aug 2026 02:24
URI:	http://repository.its.ac.id/id/eprint/141099

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