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研究生:阮生清
研究生(外文):Nguyen Sinh Thanh
論文名稱:藍色螢光有機發光二極體元件結構最佳化
論文名稱(外文):The Optimization of Device Structures of Blue Fluorescent Organic Light Emitting Diode
指導教授:莊赋祥
學位類別:碩士
校院名稱:國立虎尾科技大學
系所名稱:光電與材料科技研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:英文
論文頁數:69
中文關鍵詞:organic light-emitting diode (OLED)blue fluorescent materialsfluorescent OLEDfluorescenceoptimization OLED.
外文關鍵詞:organic light-emitting diode (OLED)blue fluorescent materialsfluorescent OLEDfluorescenceoptimization OLED.
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In this research, the optimization of device structures of blue fluorescent organic light emitting diode (OLED) with two different host materials UBH-15 (doped with EB-515) or WBH-301 (doped with WBD-701) was fabricated. By adjusting the thickness of each layer in OLED structure as well as total thickness of device, the position of recombination zone was controlled and located in the central region of emitting layer (EML) that significantly increases device efficiency. Two devices (UBH-15: EB-515 and WBH-301: WBD-701) with the current efficiency of 7.4 cd/A at current density 50 mA/cm2 and with Commission Internationale de L’Eclairage (CIE) coordinates (x= 0.17, y= 0.33), and 9.0 cd/A at 50 mA/cm2, CIE coordinates (0.18, 0.33), respectively.

In this research, the optimization of device structures of blue fluorescent organic light emitting diode (OLED) with two different host materials UBH-15 (doped with EB-515) or WBH-301 (doped with WBD-701) was fabricated. By adjusting the thickness of each layer in OLED structure as well as total thickness of device, the position of recombination zone was controlled and located in the central region of emitting layer (EML) that significantly increases device efficiency. Two devices (UBH-15: EB-515 and WBH-301: WBD-701) with the current efficiency of 7.4 cd/A at current density 50 mA/cm2 and with Commission Internationale de L’Eclairage (CIE) coordinates (x= 0.17, y= 0.33), and 9.0 cd/A at 50 mA/cm2, CIE coordinates (0.18, 0.33), respectively.

Abstract...................................................i
List of Tables............................................vi
List of Figures .........................................vii
Chapter 1 Introduction.....................................1
1.1 History of organic light emitting diodes...........1
1.2 Advantages and Disadvantage of OLED................2
1.2.1 Advantages.........................................2
1.2.2 Disadvantages......................................2
1.3 Application and Market of OLED.....................4
Chapter 2 Literature Review................................5
2.1 Materials for OLED.................................5
1.2.3 Anode..............................................5
1.2.4 Cathode....................................................5
1.2.5 Hole injection material (HIM)......................7
1.2.6 Hole transport material (HTM)......................7
1.2.7 Host material......................................7
1.2.8 Dopant material....................................8
1.2.9 Electron transport material (ETM)..................8
1.2.10 Electron injection material (EIM)..................9
1.2.11 Hole blocking material (HBM).......................9
1.2.12 Electron blocking material (EBM)...................9
2.2 Operating principles of OLED......................10
2.3 Energy transfer principle.........................12
2.4 The role of blue fluorescent material in white organic light emitting diodes.............................13
2.5 Outstanding structure device of blue fluorescent OLED......................................................14
Chapter 3 Methodology.....................................16
3.1 Materials in this study...........................16
3.2 Introduction about equipments system..............17
3.2.1 Spin coater.......................................17
3.2.2 Evaporation system................................17
3.2.3 Load hand system..................................18
3.2.4 Measurement system................................22
3.3 OLED fabrication process..........................23
3.3.1 Preparation ITO glass substrate ..................23
3.3.2 O2 plasma treatment...............................23
3.3.3 Deposition layers.................................23
3.3.4 Measurement.......................................24
Chapter 4 Experiments ..................................27
4.1 Effect of Alq3 thickness as electron transport material..................................................28
4.2 Effect of WBH301:WBD701 thickness as emitting material..................................................32
4.3 Effect of Ni-100 thickness as hole injection material..................................................36
4.4 Effect of using Tris-8-hydroxyquinoline aluminum (Alq3) doped with lithium quinolate (Liq) as electron transport layer...........................................40
4.4.1 Comparison of using different electron transport materials concentration...................................40
4.4.2 Effect of Alq3: Liq (2:1) thickness as electron transport material........................................45
4.5 Effect of changing UHB-15 doped with 3wt% EB-515 as emitting layer in blue fluorescent host device structure..48
4.5.1 Effect of layers thickness on devices with UBH-15: EB-515 as emitting material...............................49
4.5.2 Comparison of outstanding devices structure with UBH-15: EB-515 as EML compare with device C-2.............51
Chapter 5 Conclusions.....................................55
References................................................56


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