Investigasi Struktur Dan Sifat Optoelektronik Material Perovskit Anorganik CSPBI3 Dan CSSNI3 Dengan Aditif NAI Pada Konsentrasi MOL Rendah.

Br. Sembiring, Imelda Triamanda (2026) Investigasi Struktur Dan Sifat Optoelektronik Material Perovskit Anorganik CSPBI3 Dan CSSNI3 Dengan Aditif NAI Pada Konsentrasi MOL Rendah. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Meningkatnya kebutuhan energi global dan keterbatasan sumber energi fosil mendorong pengembangan teknologi sel surya berbasis material perovskit yang memiliki sifat optoelektronik unggul, namun masih menghadapi permasalahan stabilitas struktur dan degradasi material. CsPbI3 memiliki efisiensi tinggi, tapi terkendala toksisitas Pb, sedangkan CsSnI3 lebih ramah lingkungan namun Sn2+ menjadi Sn4+. Penelitian ini bertujuan untuk menginvestigasi pengaruh aditif natrium iodida (NaI) terhadap struktur dan sifat optoelektronik perovskit anorganik CsPbI3 dan CsSnI3. Sampel yang digunakan berupa film tipis CsPbI3 dan CsSnI3 dengan variasi konsentrasi NaI sebesar 0%, 5%, dan 10%. Sintesis dilakukan menggunakan pelarut dimetilformamida (DMF) dan agen penstabil asam askorbat (AA) 30% melalui proses ultrasonifikasi pada suhu ruang dalam kondisi udara bebas. Film perovskit kemudian dibuat menggunakan metode drop casting pada substrat kaca dan dipanaskan pada suhu 280°C untuk CsPbI3 dan 140°C untuk CsSnI3 selama 15 menit. Karakterisasi dilakukan menggunakan pengamatan visual untuk mengevaluasi kestabilan material, vis-spektrofotometer untuk menentukan absorbansi dan energi celah pita (band gap), X-Ray Diffraction (XRD) untuk mengidentifikasi struktur kristal dan fase material, serta Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy (SEM/EDX) untuk menganalisis morfologi permukaan dan komposisi unsur. Hasil penelitian menunjukkan bahwa penambahan NaI memengaruhi pembentukan struktur kristal, kualitas morfologi film, serta sifat optoelektronik kedua material perovskit. Sampel dengan aditif NaI menunjukkan peningkatan kestabilan dibandingkan sampel tanpa aditif, yang ditandai dengan perubahan fase yang lebih lambat, kristalinitas yang lebih baik, serta morfologi permukaan yang lebih homogen.
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The increasing global demand for energy and the depletion of fossil fuel resources have driven the development of perovskite-based solar cell technology due to its outstanding optoelectronic properties. However, these materials still face challenges related to structural stability and material degradation. CsPbI3 exhibits high power conversion efficiency but is limited by the toxicity of lead (Pb), whereas CsSnI3 is considered a more environmentally friendly alternative but suffers from poor stability because Sn²⁺ is readily oxidized to Sn⁴⁺. This study aims to investigate the effect of sodium iodide (NaI) additive on the structural and optoelectronic properties of inorganic CsPbI3 and CsSnI3 perovskites. Thin films of CsPbI3 and CsSnI3 with NaI concentrations of 0%, 5%, and 10% were prepared. The precursor solutions were synthesized using dimethylformamide (DMF) as the solvent and 30% ascorbic acid (AA) as the stabilizing agent through ultrasonication at room temperature under ambient conditions. The perovskite films were then deposited onto glass substrates using the drop-casting method and annealed at 280°C for CsPbI3 and 140°C for CsSnI3 for 15 minutes. Characterization was carried out through visual observation to evaluate material stability, UV–Vis spectrophotometry to determine absorbance and band gap energy, X-ray diffraction (XRD) to identify the crystal structure and phase composition, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM/EDX) to analyze surface morphology and elemental composition. The results indicate that the addition of NaI influences the crystal structure, film morphology, and optoelectronic properties of both perovskite materials. Samples containing NaI exhibited improved stability compared with those without the additive, as evidenced by slower phase transformation, enhanced crystallinity, and more homogeneous surface morphology.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	aditif NaI, perovskit anorganik, CsPbI₃, CsSnI₃, NaI additive, inorganic perovskite, CsPbI3, CsSnI3.
Subjects:	Q Science > QC Physics Q Science > QC Physics > QC100 Crystals. Q Science > QD Chemistry > QD1 Oxidation-reduction reaction.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics
Depositing User:	Imelda Triamanda Br. Sembiring
Date Deposited:	04 Aug 2026 02:38
Last Modified:	04 Aug 2026 02:38
URI:	http://repository.its.ac.id/id/eprint/142407

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