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Enhancement of Light Extraction Efficiency of Organic Light Emitting Diodes using Spin-on Glass based Randomly Dispersed Nano-pillar Arrays
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 김장주 | - |
| dc.contributor.author | 한경훈 | - |
| dc.date.accessioned | 2017-07-14T03:15:13Z | - |
| dc.date.available | 2017-07-14T03:15:13Z | - |
| dc.date.issued | 2013-02 | - |
| dc.identifier.other | 000000010286 | - |
| dc.identifier.uri | https://hdl.handle.net/10371/123421 | - |
| dc.description | 학위논문 (석사)-- 서울대학교 대학원 : 재료공학부(하이브리드 재료), 2013. 2. 김장주. | - |
| dc.description.abstract | Randomly dispersed nano-pillar array (RaDNA) was embedded between the transparent electrode and the glass substrate to extract lights confined inside organic light emitting diodes (OLED). The room-temperature nano-imprining lithography (RT-NIL) was employed for the fabrication of RaDNA. Spin-on glass was utilized as a material of the nano-pillar array for stable devices. The pillar arrays were planarized before fabrication of OLEDs using a high refractive index material (trialkoxysilane-capped PMMA-titania hybrid optical material) to reduce the leakage current. The RaDNA OLED showed 7% enhancement in normal direction and 19% enhancement of light extraction efficiency in an integrating sphere. The emission pattern of RaDNA device showed no variation of emission spectrum with azimuthal angle and viewing angle. | - |
| dc.description.tableofcontents | Abstract i
Contents iii List of Tables v List of Figures vi Chapter 1 Introduction 1 1.1 Organic light emitting diode: principle and limitation of efficiency 1 1.2 OLEDs with randomly dispersed nano-pillar array (RaDNA) 5 1.3 Spin-on glass for stable RaDNA OLEDs 9 Chapter 2 Fabrication and characterization of spin-on glass RaDNA substrate 12 2.1 Introduction 12 2.2 Fabrication of RaDNA substrate 13 2.3 Planarization of RaDNA substrate 16 2.4 Characterization of RaDNA substrate 18 Chapter 3 Application of SOG RaDNA substrate in green phosphorescent OLEDs 30 3.1 Design of green phosphorescent OLEDs 30 3.2 Fabrication of green phosphorescent OLEDs 33 3.3 Characterization of green phosphorescent OLEDs 35 Chapter 4 Conclusion 39 References 40 요약 (국문초록) 42 | - |
| dc.format | application/pdf | - |
| dc.format.extent | 1738557 bytes | - |
| dc.format.medium | application/pdf | - |
| dc.language.iso | en | - |
| dc.publisher | 서울대학교 대학원 | - |
| dc.subject.ddc | 620 | - |
| dc.title | Enhancement of Light Extraction Efficiency of Organic Light Emitting Diodes using Spin-on Glass based Randomly Dispersed Nano-pillar Arrays | - |
| dc.type | Thesis | - |
| dc.description.degree | Master | - |
| dc.citation.pages | 42 | - |
| dc.contributor.affiliation | 공과대학 재료공학부(하이브리드 재료) | - |
| dc.date.awarded | 2013-02 | - |
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