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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 吳志毅(Chih-I Wu) | |
dc.contributor.author | Jung-Hung Chang | en |
dc.contributor.author | 張榮宏 | zh_TW |
dc.date.accessioned | 2021-06-16T03:53:04Z | - |
dc.date.available | 2020-03-13 | |
dc.date.copyright | 2015-03-13 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2015-01-09 | |
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dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/55246 | - |
dc.description.abstract | Direct photoemission spectroscopy (PES) has been widely used to investigate the interfaces and surfaces of organic materials, including ultraviolet photoelectron spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS). However, inverse photoemission spectroscopy (IPES) is more difficult to obtain and not widely used as direct PES due to its extremely low yield of inverse photoemission process. The IPES is set up in this work. With combination of UPS and IPES in the identical equipment, more details of the electrical properties in the organic materials can be investigated.
In this dissertation, the mechanism of charge generation and transport in tandem organic light emitting diodes (OLEDs) and AC-driven OLEDs are explored via UPS and IPES simultaneously. Moreover, the application and physical mechanisms of 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HAT-CN) in organic devices are also investigated with XPS, UPS and IPES, including the charge generation mechanism of tandem-OLEDs based on n-type doped ETL/HAT-CN structure and the mechanism of improved stability of OLEDs with HAT-CN as hole injection layers. On the other hand, graphene thin films have a strong potential to be transparent electrodes in organic electronic devices with excellent conductivity and highly transparent properties. In this dissertation, n-type doped graphene with a new polymer-free transfer method is achieved. With n-doped multilayer graphene as top cathodes, all-solution-processed transparent OLEDs could be fabricated without any vacuum process. | en |
dc.description.provenance | Made available in DSpace on 2021-06-16T03:53:04Z (GMT). No. of bitstreams: 1 ntu-103-F97941068-1.pdf: 8754223 bytes, checksum: 6bb129475714772f51cca3e18d4f9c1c (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 中文摘要 I
Abstract II Content III List of Figures VI List of Tables X Chapter 1 Introduction 1 1.1 Organic light-emitting diodes (OLEDs) 1 1.1.1 Development and applications of OLEDs 1 1.1.2 Basic structures and operation principles of OLEDs 3 1.2 Background of electron energetics at surfaces and interfaces 6 1.3 Background of Graphene 9 1.4 Motivation 11 1.4.1 Physical mechanisms in OLEDs 11 1.4.2 Achievement of all solution-processed transparent OLEDs 11 1.5 Organization of the thesis 13 References 14 Chapter 2 Experiment 15 2.1 Direct photoemission spectroscopy (PES) 15 2.1.1 Ultra-violet photoemission spectroscopy (UPS) 17 2.1.2 X-ray photoemission spectroscopy (XPS) 19 2.1.3 Cylindrical Mirror Analyzer (CMA) 20 2.2 Inverse photoemission spectroscopy (IPES) 21 2.3 Fabrication and measurement of OLEDs 28 2.3.1 Vacuum thermal-evaporated OLEDs 29 2.3.2 Solution-processed OLEDs 32 2.3.3 Characteristics of OLEDs 33 2.4 Transfer of Graphene 34 References 36 Chapter 3 The investigation of carrier generation and transport in tandem-OLEDs and AC-organic EL devices through UPS and IPES 37 3.1 Introduction 37 3.1.1 Background of Tandem-OLEDs 37 3.1.2 Background of AC-organic electroluminance devices 38 3.2 Mechanisms of carrier generation and transport in tandem-OLEDs devices with p-n junction CGLs 40 3.2.1 Tandem-OLED devices 40 3.2.2 The investigation of energy level alignment through UPS and IPES 44 3.3 Mechanisms of carrier generation and transport in AC-organic electroluminance devices 48 3.3.1 AC-driven organic EL devices 48 3.3.2 The investigation of energy level alignment through UPS and IPES 51 3.4 Summary 58 References 59 Chapter 4 The investigation of 1,4,5,8,9,11-hexaazatriphenylene hexacarbonitrile (HAT-CN) in OLED devices 61 4.1 Introduction 62 4.2 Electronic energy structure of HAT-CN 64 4.3 Charge generation process of tandem-OLEDs with HAT-CN as intermediate connectors 66 4.4 Stability improvement of OLEDs by insertion of HAT-CN as HILs 71 4.4.1 ITO substrate with UV-ozone and the insertion of HILs 71 4.4.2 Stability improvement of OLEDs by inserting HILs 74 4.5 Summary 78 References 79 Chapter 5 Fully Solution-Processed Transparent OLEDs with Graphene as Top Cathodes 81 5.1 Introduction 82 5.1.1 Solution-processed OLEDs 82 5.1.2 Graphene as Transparent Electrode 83 5.2 Graphene transfer and doping 85 5.3 Solution processed multilayer polymer OLEDs 93 5.4 All-solution processed transparent polymer Graphene-OLEDs 100 5.5 Summary 108 References 109 Chapter 6 Summary and Future work 113 6.1 Summary 113 6.2 Future work 114 | |
dc.language.iso | en | |
dc.title | 利用正向與反向光電子能譜分析儀分析OLEDs中介面能階匹配及
利用石墨烯實現全濕式製程穿透OLEDs元件之研究 | zh_TW |
dc.title | The Investigation of Energy Level Alignment in OLEDs by Direct and Inverse Photoemission Spectroscopy &
& All Solution-Processed Transparent OLEDs with Graphene as Top Cathodes | en |
dc.type | Thesis | |
dc.date.schoolyear | 103-1 | |
dc.description.degree | 博士 | |
dc.contributor.oralexamcommittee | 吳忠幟,林恭如,汪根欉,陳美杏,陳裕宏 | |
dc.subject.keyword | 光電子能譜,反轉式光電子能譜,有機發光二極體,介面能階分佈,石墨烯,n-型摻雜,濕式製程透明有機發光二極體, | zh_TW |
dc.subject.keyword | OLEDs,UPS,XPS,IPES,energy level alignment,graphene,n-type doping,solution-processed transparent OLEDs, | en |
dc.relation.page | 116 | |
dc.rights.note | 有償授權 | |
dc.date.accepted | 2015-01-09 | |
dc.contributor.author-college | 電機資訊學院 | zh_TW |
dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
顯示於系所單位: | 光電工程學研究所 |
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