Februarna, Tittanara Eka Putri (2026) Analisis Pengaruh Temperatur Heat Treatment Perovskite CsPbBr3 Thin Film Terhadap Performa dan Stabilitas Perangkat Si/Perovskite Tandem Solar Cell. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pengembangan Si/Perovskite tandem solar cell menjadi salah satu strategi untuk meningkatkan efisiensi konversi energi surya, namun performa dan stabilitas lapisan CsPbBr₃ masih dipengaruhi oleh temperatur heat treatment, penggunaan protective coating, dan kondisi operasi perangkat. Penelitian ini bertujuan mengevaluasi pengaruh temperatur heat treatment terhadap sifat optik, performa fotovoltaik, dan stabilitas perangkat Si/CsPbBr₃, serta menganalisis pengaruh protective coating berbasis clear epoxy resin. Lapisan CsPbBr₃ disintesis menggunakan metode ligand assisted reprecipitation (LARP), dideposisikan dengan metode doctor blade coating, kemudian diberi heat treatment pada temperatur 25°C, 60°C, dan 110°C. Karakterisasi dilakukan menggunakan SEM, XRD, UV–Vis, PL, LSV, dan EIS. Hasil penelitian menunjukkan bahwa temperatur heat treatment 60°C menghasilkan performa dan stabilitas terbaik. Citra SEM memperlihatkan morfologi kristal dan antarmuka Si/CsPbBr₃ yang paling homogen, sedangkan hasil UV–Vis menunjukkan nilai optical band gap sekitar 2,20 eV sebelum aging dan sedikit menurun menjadi 2,19 eV setelah pengujian, menunjukkan stabilitas optik yang lebih baik dibandingkan variasi lainnya. Analisis XRD mengonfirmasi bahwa setelah aging terjadi transformasi fase dominan dari CsPbBr₃ menjadi CsPb₂Br₅, dengan ukuran kristalit pada variasi 60°C berubah dari 54,78 nm sebelum aging menjadi 60,45 nm setelah solar simulator dan 44,66 nm setelah direct sunlight. Hasil PL menunjukkan terjadinya blue shift setelah aging, sedangkan pengujian LSV memperlihatkan bahwa variasi 60°C menghasilkan efisiensi tertinggi sebesar 25,32% pada solar simulator dan 28,94% pada direct sunlight, serta mampu mempertahankan efisiensi sekitar 18–23% setelah 14 hari pengujian. Penggunaan protective coating meningkatkan stabilitas terhadap pengaruh lingkungan, namun menurunkan kemampuan penyerapan cahaya sehingga karakteristik UV–Vis dan PL berubah dan band gap tidak dapat ditentukan secara representatif menggunakan metode Tauc. Secara keseluruhan, heat treatment 60°C memberikan keseimbangan terbaik antara kualitas kristal, sifat optik, performa fotovoltaik, dan stabilitas perangkat Si/Perovskite tandem solar cell.
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The development of Si/perovskite tandem solar cells has emerged as a promising strategy to improve solar energy conversion efficiency. However, the performance and stability of CsPbBr₃ thin films are strongly influenced by heat-treatment temperature, protective coating, and operating conditions. This study aimed to investigate the effect of heat-treatment temperature on the optical properties, photovoltaic performance, and stability of Si/CsPbBr₃ devices, as well as to evaluate the influence of a clear epoxy resin protective coating. CsPbBr₃ thin films were synthesized using the ligand-assisted reprecipitation (LARP) method, deposited onto silicon substrates by doctor blade coating, and subjected to heat treatment at 25°C, 60°C, and 110°C. The samples were characterized using SEM, XRD, UV–Vis, photoluminescence (PL), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (EIS). The results demonstrated that a heat-treatment temperature of 60°C provided the optimum balance between crystal quality, optical properties, photovoltaic performance, and operational stability. SEM analysis revealed the most homogeneous crystal morphology and Si/CsPbBr₃ interface, while UV–Vis measurements showed an optical band gap of approximately 2.20 eV before aging, which slightly decreased to 2.19 eV after aging, indicating superior optical stability. XRD analysis confirmed a dominant phase transformation from CsPbBr₃ to CsPb₂Br₅ after light exposure, with the crystallite size of the 60°C sample changing from 54.78 nm before aging to 60.45 nm after solar simulator exposure and 44.66 nm after direct sunlight exposure. PL spectra exhibited a blue shift after aging, whereas LSV measurements showed the highest power conversion efficiencies of 25.32% under the solar simulator and 28.94% under direct sunlight. Moreover, the device retained efficiencies of approximately 18–23% after 14 days of aging. The clear epoxy resin coating improved environmental stability but reduced light absorption, resulting in altered UV–Vis and PL responses and preventing reliable optical band-gap determination using the Tauc method. Overall, 60°C was identified as the optimum heat-treatment temperature for enhancing both the performance and stability of Si/perovskite tandem solar cells.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Heat treatment, CsPbBr₃, protective coating, stabilitas, Si/Perovskite tandem solar cell, Heat Treatment, Perovskite CsPbBr3, Protective Coating, Stability, Tandem Solar Cell |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. T Technology > TJ Mechanical engineering and machinery > TJ810.5 Solar energy T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1087 Photovoltaic power generation T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2960 Dye-sensitized solar cells. Solar batteries. Solar cells |
| Divisions: | Faculty of Industrial Technology > Material & Metallurgical Engineering > 27101-(S2) Master Thesis |
| Depositing User: | Tittanara Eka Putri Februarna |
| Date Deposited: | 29 Jul 2026 07:29 |
| Last Modified: | 29 Jul 2026 07:29 |
| URI: | http://repository.its.ac.id/id/eprint/139054 |
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