이온성 액체 및 스퍼터 기술을 이용한 Ag 나노입자 합성과 국부 표면 플라즈몬 효과에 의한 InGaN 양자우물 구조에 발광 효율 증가
Enhanced Luminescence of InGaN Quantum Well Structures with Localized Surface Plasmon by Using Sputter-Fabricated Ag Nanoparticles in an Ionic Liquid
- 주제(키워드) Ionic liquid , Localized surface plasmons , Metal nanoparticles , Photoluminescence
- 발행기관 고려대학교 대학원
- 지도교수 이인환
- 발행년도 2019
- 학위수여년월 2019. 2
- 학위구분 석사
- 학과 대학원 신소재공학과
- 원문페이지 55 p
- 실제URI http://www.dcollection.net/handler/korea/000000082479
- UCI I804:11009-000000082479
- DOI 10.23186/korea.000000082479.11009.0000823
- 본문언어 한국어
- 제출원본 000045979194
초록/요약
Optical characteristics of InGaN/GaN active multi-quantum-well structures fabricated using Ag nanoparticles (NPs) in ionic liquids (ILs) are studied. Small, uniform Ag NPs in the ILs are synthesized via sputtering. Also, absorbance spectra of Ag NPs in the IL featured the sharp and blue shift compared to Ag/SiO2 NPs. To immobilize the ILs, Polymer-Ag NPs in ILs (PAIL) are fabricated by combining a suitable polymer and the IL. The light output is enhanced by a factor of 1.5 in the active layer coated with PAIL. This effect is caused by good matching between the localized surface plasmon resonance energy and the emission energy of the light emitting structure.
more목차
Contents ⅰ
List of Figures ⅲ
1. Introduction 1
2. Experimental method 11
2.1 Synthesize of core-shell Ag/SiO2 nanoparticles 11
2.2 Synthesize of Ag nanoparticles with ionic liquid 11
2.3 Fabrecation of PAIL film 12
2.4 InGaN/GaN multi quantum-well structure sample 12
2.5 Characterizations 16
2.5.1 Photoluminescence (PL) 16
2.5.2 Time-resolved photoluminescence (TRPL) 23
3. Results and discussion 25
3.1 Ag/SiO2 nanoparticles 25
3.2 Ag nanoparticles in ionic liquid 28
3.3 Polymer-Ag nanoparticles with ionic liquid 34
3.4 Optical properties of blue MQW structure with PAIL film 37
4. Conclusion 41
5. References 42
