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Enhancing Optical Properties of Cesium Lead Halide Perovskite Nanocrystals Using Ligand Exchange Treatment

Title
Enhancing Optical Properties of Cesium Lead Halide Perovskite Nanocrystals Using Ligand Exchange Treatment
Translated Title
리간드 교환 처리에 따른 세슘 납 할라이드 페로브스카이트 나노결정의 광학적 성질 향상
Authors
Sung Nak Jun
DGIST Authors
Sung Nak Jun; Jiwoong Yang; Moon Kee Choi
Advisor(s)
양지웅
Co-Advisor(s)
Moon Kee Choi
Issue Date
2022
Available Date
2022-03-08
Degree Date
2022/02
Type
Thesis
Keywords
Perovskite, Perovskite nanocrystals, Quantum dots, Optoelectronic materials, Light-emitting diode
Description
Perovskite, Perovskite nanocrystals, Quantum dots, Optoelectronic materials, Light-emitting diode
Table Of Contents
Ⅰ. Introduction 1 Ⅱ. Experimental Section and Characterization 5 2.1 Materials 5 2.2 Synthesis of CsPbX3 5 2.2.1 Synthesis of green PeNCs 5 2.2.2 Synthesis of red PeNCs 6 2.3 Ligand Exchange Treatment 6 2.4 Materials characterization 7 Ⅲ. Results and Discussion 8 3.1 Green PeNCs ligand exchange (only DDAB & OA+DDAB) 8 3.2 Red PeNCs ligand exchange (pre-DDAB & post-DDAB) 11 3.3 Blue PeNCs ligand exchange (mixed halide & DDAC) 16 3.4 Characterization of optical properties 18 3.4.1 UV-Vis-NIR Spectrophotometer and Photoluminescence Spectroscopy 18 3.4.2 Red, green, blue PeNCs of UV radiation photograph 19 3.4.3 Comparison of PLQY of after Ligand Exchange Characterization 20 3.5 Characterization of structure properties 21 3.5.1 Red, green, blue PeNCs of TEM image 21 3.5.2 Red, green, blue PeNCs of size distribution plot 21 3.5.3 HRTEM image and FFT Characterization 22 3.5.4 XRD Characterization 23 3.6 Characterization of composition 24 3.6.1 FT-IR Characterization of ligand exchanged red, green blue PeNCs 24 3.6.2 FT-IR Characterization of ligand exchanged ratio of pristine green PeNCs 24 3.6.3 FT-IR Characterization of ligand exchanged red, blue PeNCs 25 3.6.4 Comparison of XPS spectra of after ligand exchange characterization 26 Ⅳ. Conclusion 28 Reference 29 요약문 33
URI
http://dgist.dcollection.net/common/orgView/200000595010
http://hdl.handle.net/20.500.11750/16279
DOI
10.22677/thesis.200000595010
Degree
Master
Department
Energy Science & Engineering
University
DGIST
Related Researcher
  • Author Yang, Jiwoong NanoMaterials Laboratory
  • Research Interests Quantum Dots; Nanocrystals; Displays; Solar Energy; TEM; Photocatalyst
Files:
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Collection:
Department of Energy Science and EngineeringThesesMaster


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