Peningkatan Stabilitas Polar Dan Thermal Pada Perovskite CsPbI3 Quantum Dots Emisi Merah Dengan Doping Kation dan Struktur Core-Shell

Pratama, Paundra Rizky (2023) Peningkatan Stabilitas Polar Dan Thermal Pada Perovskite CsPbI3 Quantum Dots Emisi Merah Dengan Doping Kation dan Struktur Core-Shell. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 02511940000021-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 September 2025. Download (4MB) | Request a copy

Abstract

Lead Helide Quantum Dots Perovskite (LHQDs) merupakan material prospektif untuk berbagai aplikasi optoelektronik. Namun, ketidakstabilan struktur intrinsik material tersebut perlu diatasi sebelum aplikasi ke tahap komersialisasi. Dalam penelitian ini, jalur stabilisasi monodisperse perovskite CsPbI3 QDs yang dilapisi dengan perovskite hibrida FAxCs1-xPbI3 dilaporkan. Penelitian ini bertujuan untuk meningkatkan stabilitas polar dan thermal perovskite halide QDs. Variabel yang diteliti yaitu variasi komposisi doping kation Formamidin (FA) terhadap sifat optik dan stabilitas perovskite timbal halida QDs pada tingkat polaritas dan suhu lingkungan yang berbeda. Metode Hot Injection dengan 5 perkursor digunakan untuk mensintesis material CsPbI3/FAxCs1-xPbI3 QDs yang dilanjutkan pengujian dengan instrumen karakterisasi X-Ray Diffraction (XRD), Ultraviolet-Visible Spectrometer (UV-Vis), Photoluminesence Spectrometer (PL), dan Transmission Electron Microscopy (TEM) untuk mengetahui fasa dan struktur kristal, sifat optik, dan morfologi sampel. Pengujian stabilitas polar dan thermal dilakukan menggunakan instrumen PL secara In Situ. Hasil menunjukkan bahwa terdapat penurunan ukuran partikel perovskite CsPbI3/FAxCs1-xPbI3 QDs (X=0, 0.25, 0.5, 0.75) mencapai 11, 8, 7.5, dan 7.8 nm yang disertai dengan peningkatan band gap mencapai 1.77, 1.87, 1.90, dan 1.97 eV. Penambahan komposisi FA juga memicu pembentukan struktur Core-Shell biphase yang bertanggungjawab terhadap meningkatnya PLQY, stabilitas polar dan thermal. Secara keseluruhan, stabilitas terbaik dicapai oleh sampel dengan komposisi CsPbI3/FA0.75Cs0.25PbI3 (PLQY=86.7%) yang mampu mempertahankan emisi PL pada suasana polar dalam waktu lebih dari 15 menit. Selain itu, sinar emisi PL pada komposisi CsPbI3/FA0.75Cs0.25PbI3 juga mampu bertahan pada suhu tinggi mencapai suhu 150oC.
======================================================================================================================================
Perovskite Lead Helide Quantum Dots (LHQDs) are prospective materials for various optoelectronic applications. However, the material's intrinsic structural instability needs to be overcome before application to the commercialisation stage. In this study, a stabilisation pathway of monodisperse perovskite CsPbI3 QDs coated with hybrid perovskite FAxCs1-xPbI3 is reported. This study aims to improve the polar and thermal stability of perovskite halide QDs. The variables studied are the variation of Formamidine (FA) cation doping composition on the optical properties and stability of perovskite lead halide QDs at different polarity levels and ambient temperatures. The Hot Injection method with 5 percursors was used to synthesise CsPbI3/FAxCs1-xPbI3 QDs material followed by testing with X-Ray Diffraction (XRD), Ultraviolet-Visible Spectrometer (UV-Vis), Photoluminesence Spectrometer (PL), and Transmission Electron Microscopy (TEM) characterisation instruments to determine the phase and crystal structure, optical properties, and morphology of the samples. Polar and thermal stability testing was carried out using an In Situ PL instrument. The results show that there is a decrease in particle size of perovskite CsPbI3/FAxCs1-xPbI3 QDs (X=0, 0.25, 0.5, 0.75) reaching 11, 8, 7.5, and 7.8 nm accompanied by an increase in band gap reaching 1.77, 1.87, 1.90, and 1.97 eV. The addition of FA composition also triggers the formation of Core-Shell biphase structure which is responsible for the increase of PLQY, polar and thermal stability. Overall, the best stability was achieved by the sample with CsPbI3/ FA0.75Cs0.25PbI3 composition (PLQY=86.7%) which was able to maintain PL emission in a polar atmosphere for more than 15 minutes. In addition, the PL emission beam in the CsPbI3/ FA0.75Cs0.25PbI3 composition is also able to survive at high temperatures reaching 150oC.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	QLED, CsPbI3, Core-Shell, Quantum Dots, Doping Kation, QLED, CsPbI3, Core-Shell, Quantum Dots, Cation Doping
Subjects:	T Technology > TP Chemical technology T Technology > TP Chemical technology > TP248 Nanogels. Nanoparticles.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Paundra Rizky Pratama
Date Deposited:	25 Jul 2023 02:45
Last Modified:	25 Jul 2023 02:45
URI:	http://repository.its.ac.id/id/eprint/99180

Actions (login required)

View Item