Pengaruh penambahan PMMA Dalam Sintesis Lapisan Perovskit MA(Pb0,5Sn0,5)I3 dan FA(Pb0,5Sn0,5)I3 Terhadap Kestabilan Fasa dan Sifat Optiknya

Raihanah, Haliimah (2026) Pengaruh penambahan PMMA Dalam Sintesis Lapisan Perovskit MA(Pb0,5Sn0,5)I3 dan FA(Pb0,5Sn0,5)I3 Terhadap Kestabilan Fasa dan Sifat Optiknya. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sel surya perovskit campuran Pb-Sn berbasis iodida dikembangkan sebagai teknologi fotovoltaik masa depan yang ramah lingkungan dan mampu menyerap cahaya dalam rentang yang luas, namun stabilitas kimianya masih terbatas akibat oksidasi Sn^(2+). Untuk mengatasi kendala tersebut, penelitian ini mengkaji pengaruh variasi kation situs A (MA dan FA) serta penambahan aditif polimer poly(methyl methacrylate) (PMMA) dalam meningkatkan stabilitas fasa dan sifat optik material. Material perovskit MA(Pb0,5 Sn0,5) I3 dan FA(Pb0,5 Sn0,5) I3 disintesis menggunakan metode drop casting dengan variasi penambahan PMMA sebesar 0,5; 1; 1,5 wt%. Karakterisasi dilakukan dengan menggunakan pengamatan visual, UV-Vis Spectroscopy, X-Ray Diffraction (XRD), dan Scanning Electron Microscopy (SEM). Hasil XRD menunjukkan adanya perubahan fasa dari fasa-δ pada hari ke-0 menjadi fasa-β pada hari ke-5 pada material berbasis FA, dan material berbasis MA berhasil mempertahankan fasa-α hingga hari ke-10. Hasil analisis absorbansi menunjukkan bahwa material berbasis MA memiliki absorbansi lebih tinggi dibandingkan material berbasis FA. Analisis energi celah pita menunjukkan bahwa keberadaan PMMA memengaruhi nilai bandgap sekaligus membantu mempertahankan kestabilannya selama penyimpanan. Pada sistem MA(Pb0,5Sn0,5)I3 dan FA(Pb0,5Sn0,5)I3, konsentrasi PMMA sebesar 0,5 wt% menghasilkan energi celah pita masing-masing sebesar 1,23 eV dan 1,24 eV. Hasil analisis SEM menunjukkan bahwa penggunaan PMMA menghasilkan ukuran butir yang lebih kecil dengan distribusi yang lebih homogen. Secara keseluruhan, PMMA memberikan pengaruh terhadap sifat optik material, terutama absorbansi dan energi celah pita, serta meningkatkan kestabilan optik selama penyimpanan dibandingkan sampel tanpa aditif. Berdasarkan hasil penelitian, konsentrasi optimum diperoleh pada penggunaan PMMA sebesar 0,5 wt%.
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Iodide-based Pb-Sn mixed-perovskite solar cells have been developed as an environmentally friendly photovoltaic technology of the future capable of absorbing light across a broad spectrum; however, their chemical stability remains limited due to the oxidation of Sn^(2+). To address this challenge, this study investigates the effect of varying the A-site cations (MA and FA) and the addition of the polymer additive poly(methyl methacrylate) (PMMA) on improving the phase stability and optical properties of the material. The MA(Pb0,5Sn0,5)I3 and FA(Pb0,5Sn0,5)I3 perovskite materials were synthesized using the drop casting method with PMMA additions of 0.5, 1, and 1.5 wt%. Characterization was performed using visual observation, UV-Vis spectroscopy, X-ray diffraction (XRD), and scanning electron microscopy (SEM). The XRD results showed a phase transition from the δ phase on day 0 to the β phase on day 5 in the FA-based material, while the MA-based material successfully retained the α phase until day 10. Absorbance analysis results showed that the MA-based material had higher absorbance compared to the FA-based material. Bandgap energy analysis indicated that the presence of PMMA influenced the bandgap value while also helping to maintain its stability during storage. In the MA(Pb0,5Sn0,5)I3 and FA(Pb0,5Sn0,5)I3 systems, a PMMA concentration of 0.5 wt% resulted in bandgap energies of 1.23 eV and 1.24 eV, respectively. The SEM analysis results show that the use of PMMA produces smaller particle sizes with a more homogeneous distribution. Overall, PMMA affects the optical properties of the material—particularly absorbance and bandgap energy—and improves optical stability during storage compared to samples without additives. Based on the research results, the optimal concentration was found to be 0.5 wt% PMMA.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	FA(Pb0,5 Sn0,5), MA(Pb0,5 Sn0,5), Perovskit Pb-Sn, poly(methyl methacrylate) (PMMA), FA(Pb0,5 Sn0,5), MA(Pb0,5 Sn0,5), Perovskite Pb-Sn, poly(methyl methacrylate) (PMMA)
Subjects:	Q Science Q Science > QC Physics Q Science > QC Physics > QC100 Crystals. Q Science > QC Physics > QC162 Adsorption and absorption
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics
Depositing User:	Haliimah Raihanah
Date Deposited:	31 Jul 2026 03:14
Last Modified:	31 Jul 2026 03:14
URI:	http://repository.its.ac.id/id/eprint/140652

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