Maharaniy, Lintang Zahra' (2025) Studi Morfologi Dan Performa Fotoelektrokimia Thin Film Perovskite Dengan N-Methyl-2-Pyrrolidone Sebagai Dispersan Permukaan. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Krisis energi dan dampak lingkungan mendorong pengembangan hidrogen sebagai sumber energi alternatif yang menjanjikan, dengan teknik photoelectrochemical (PEC) sebagai metode produksi yang ramah lingkungan. Penelitian ini meliputi penggunaan thin-film perovskite CsPbBr3 sebagai fotoanoda dalam sistem PEC. CsPbBr3 dipilih karena photoluminescence yang tinggi dan stabilitas termal baik. Namun, CsPbBr3 mengalami ketidakstabilan dalam kontak langsung dengan elektrolit. Tujuan penelitian ini adalah menganalisis karakteristik morfologi thin-film CsPbBr3 berbasis pelarut N-Methyl-2-Pyrrolidone (NMP) dalam N,N-Dimethylformamide (DMF) setelah perlakuan panas, serta menguji pengaruh NMP dalam DMF sebagai pelarut fotoanoda terhadap stabilitas performa thin-film CsPbBr3 dalam sistem fotoelektrokimia. NMP dapat meningkatkan kelarutan CsPbBr3, mengurangi pinhole surface, meminimalkan migrasi molekul air di sepanjang grain boundary, dan memperbaiki kristalinitas perovskite. Metodologi penelitian meliputi sintesis CsPbBr3 melalui Ligand-Assisted Reprecipitation Process (LARP) dan fabrikasi fotoanoda menggunakan metode dropcasting pada substrat FTO/TiO2. Variasi rasio yang digunakan yaitu NMP:DMF 1:10, 1:5, 3:4 dan perlakuan panas pada 25C, 90C, 110C selama 30 menit. Karakterisasi dilakukan dengan SEM dan XRD untuk morfologi dan struktur kristal, TG/DTA untuk stabilitas termal, serta PL dan UV-Vis untuk properti optik. Performa fotoelektrokimia dan oksidasi dianalisis melalui uji CV pada konsentrasi glukosa dan KOH 0,1 M. Hasil menunjukkan bahwa variasi rasio pelarut NMP:DMF memengaruhi ukuran kristal CsPbBr3. Pengujian PL dan UV-Vis mengindikasikan stabilitas absorption edge CsPbBr3 dan emission peak yang tinggi pada rasio NMP:DMF 1:5 dan 3:4 dengan perlakuan panas 110C. Performa CV terbaik untuk produksi hidrogen terlihat pada fotoanoda tanpa perlakuan panas dengan rasio NMP/DMF 1:10 dalam kondisi terang, mencapai current density 1,107 mA/cm2. Hal ini mengindikasikan bahwa rasio pelarut NMP/DMF yang optimal tanpa perlakuan panas menghasilkan film yang lebih ideal untuk aplikasi fotoelektrokimia berbasis perovskite.
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The energy crisis and environmental impacts have driven the development of hydrogen as a promising alternative energy source, with the photoelectrochemical (PEC) technique emerging as an environmentally friendly production method. This study focuses on the use of CsPbBr₃ thin-film perovskite as a photoanode in a PEC system. CsPbBr₃ was selected due to its high photoluminescence and good thermal stability. However, CsPbBr₃ suffers from instability when in direct contact with the electrolyte. The aim of this research is to analyze the morphological characteristics of CsPbBr₃ thin films based on the solvent N-Methyl-2-Pyrrolidone (NMP) in N,N-Dimethylformamide (DMF) after thermal treatment, as well as to examine the effect of NMP in DMF as a photoanode solvent on the performance stability of CsPbBr₃ thin films in a photoelectrochemical system. NMP can enhance the solubility of CsPbBr₃, reduce surface pinholes, minimize water molecule migration along grain boundaries, and improve the crystallinity of the perovskite. The methodology includes the synthesis of CsPbBr₃ using the Ligand-Assisted Reprecipitation Process (LARP) and the fabrication of photoanodes via drop-casting on FTO/TiO₂ substrates. The solvent ratio variations used were NMP:DMF 1:10, 1:5, and 3:4, with thermal treatments at 25°C, 90°C, and 110°C for 30 minutes. Characterizations were performed using SEM and XRD for morphology and crystal structure, TG/DTA for thermal stability, and PL and UV-Vis for optical properties. Photoelectrochemical performance and oxidation were analyzed using CV testing in 0.1 M glucose and KOH solutions. The results show that variations in the NMP:DMF solvent ratio affect the crystal size of CsPbBr₃. PL and UV-Vis tests indicate the stability of the CsPbBr₃ absorption edge and high emission peaks at NMP:DMF ratios of 1:5 and 3:4 with thermal treatment at 110°C. The best CV performance for hydrogen production was recorded for the photoanode without thermal treatment at an NMP:DMF ratio of 1:10 under light conditions, achieving a current density of 1.107 mA/cm². This indicates that the optimal NMP:DMF solvent ratio without thermal treatment results in a more ideal film for perovskite-based photoelectrochemical applications.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Fotoelektrokimia, N-Methyl-2-Pyrrolidone, Perovskite Thin Film CsPbBr3, N-Methyl-2-Pyrrolidone, Perovskite Thin Film CsPbBr3, Photoelectrochemical |
| Subjects: | Q Science Q Science > QC Physics > QC475 Photoluminescence Q Science > QC Physics > QC610.3 Electric conductivity T Technology > TP Chemical technology > TP255 Electrochemistry, Industrial. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Lintang Zahra' Maharaniy |
| Date Deposited: | 31 Jul 2025 05:30 |
| Last Modified: | 31 Jul 2025 05:30 |
| URI: | http://repository.its.ac.id/id/eprint/124890 |
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