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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 180 o ) 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 Data line
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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 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 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 Z ħ Z
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Coupling of Spin Angular Momenta of Two electrons θ1θ1 θ0θ0 θ-1θ-1 Σ 1/43/4 Z SingletTriplet
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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 Al 2 O 3 polyacyrlate 使水氣不易進入
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Barix Layer
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Atomic Layer Deposition (ALD) Al(CH 3 ) 3 (g) + :Si-O-H (s) → :Si-O-Al(CH 3 ) 2 (s) + CH 4
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Atomic Layer Deposition (ALD) OH 取代 CH 3 2H 2 O (g) + :Si-O-Al(CH 3 ) 2 (s) → :Si-O-Al(OH) 2 (s) + 2CH 4
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AlOx with ALD a a b b c c 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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