Title

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

Alternative Title

리간드 교환 처리에 따른 세슘 납 할라이드 페로브스카이트 나노결정의 광학적 성질 향상

DGIST Authors

Sung Nak Jun ; Jiwoong Yang ; Moon Kee Choi

Advisor

양지웅

Co-Advisor(s)

Moon Kee Choi

Issued Date

2022

Awarded Date

2022/02

Citation

Sung Nak Jun. (2022). Enhancing Optical Properties of Cesium Lead Halide Perovskite Nanocrystals Using Ligand Exchange Treatment. doi: 10.22677/thesis.200000595010

Type

Thesis

Subject

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

Publisher

DGIST

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