oled 元件操作壽命之提昇 林政賢. outline introduction oled display and lighting pm and am...
TRANSCRIPT
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OLED元件操作壽命之提昇
林政賢
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
Outline
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Band Diagram of OLED
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OLED 優點與缺點
• 自發光,不需要背光模組 • 高亮度• 響應時間短 (< 2 μs) • 高對比 • 廣視角 ( 接近 180o) • 重量輕、厚度薄 • 構造簡單,低成本 • 可撓性 ( 塑膠基底 ) • 可全彩化
• 壽命短• 高驅動電壓• 光譜寬
優 點 缺 點
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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OLED Display
Sony
11 inch, XEL-1
3mm thickness
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OLED Lighting
OLED
LED
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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Passive Matrix Driving
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Active Matrix Driving
Scan line
Dat
a li
ne
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Active Matrix Driving
Cross Section of Bottom Emitting AMOLED
Cross Section of Top Emitting AMOLED
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Passive Matrix (PM)
Active Matrix (AM)
Easy-fabrication and Low-cost
High power consumption and Short lifetime
Suitable for large size and Long lifetime
The thin-film transistor decreases the aperture ratio
Advantages
Advantages
Disadvantages
Disadvantages
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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Process of OLED
Substrate
Pillar PillarPillar Pillar
ITO
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Negative PR
Proximity Aligner (broad band)hv
Negative Resist Coating
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SEM Profile
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Full Color Capability
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Patterned Lateral RGB Emitters
Fine Pitch Shadow Mask requirements:– Resolution– Undercut angle– Surface roughness– Holding mechanism– Thermal stability
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Physical Vapor Deposition
距離遠,材料易浪費
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Ink Jet Printing (IJP)
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Laser Induced Thermal Imaging (LITI)
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Laser-induced Pattern-wise Sublimation (LIPS)
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整體圖
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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Singlet and Triplet Exciton
hv
Singlet ground state
Singlet excited state
Triplet excited state
: Spin up
: Spin down
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Spin Angular Momentum Vector of Electron with Different Spin States
ħ/2 ħ 3 / 2
Z
ħ/2ħ 3 / 2
Z
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Coupling of Spin Angular Momenta of Two electrons
θ1 θ0 θ-1Σ
1/4 3/4
Z
Singlet Triplet
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Energy Transfer
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Phosphorescent OLED
Ref. : M. A. Baldo et al., APL, 75, 4, 1999
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OLED Device Structure
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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Bottom Emission OLED
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Barix Layer
Al2O3
polyacyrlate
使水氣不易進入
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Barix Layer
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Atomic Layer Deposition (ALD)
Al(CH3)3 (g) + :Si-O-H (s) → :Si-O-Al(CH3)2 (s) + CH4
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Atomic Layer Deposition (ALD)
OH 取代 CH3
2H2O (g) + :Si-O-Al(CH3)2 (s) → :Si-O-Al(OH)2 (s) + 2CH4
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AlOx with ALD
aa
bb
cc
No passivation
ALD passivation
Glass lid encap
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Outline
• Introduction
• OLED display and Lighting
• PM and AM Driving
• OLED Fabrication
• Device Physics
• Passivation Layer
• Tandem OLED
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Stacked OLED
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Stacked OLED
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Stacked OLED