OLED 元件操作壽命之提昇 林政賢
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED Outline
Band Diagram of OLED
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
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
OLED Display Sony 11 inch, XEL-1 3mm thickness
OLED Lighting OLED LED
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
Passive Matrix Driving
Active Matrix Driving Scan line Data line
Active Matrix Driving Cross Section of Bottom Emitting AMOLED Cross Section of Top Emitting AMOLED
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
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
Process of OLED Substrate Pillar ITO
Negative PR Proximity Aligner (broad band) hv Negative Resist Coating
SEM Profile
Full Color Capability
Patterned Lateral RGB Emitters Fine Pitch Shadow Mask requirements: –Resolution –Undercut angle –Surface roughness –Holding mechanism –Thermal stability
Physical Vapor Deposition 距離遠，材料易浪費
Ink Jet Printing (IJP)
Laser Induced Thermal Imaging (LITI)
Laser-induced Pattern-wise Sublimation (LIPS)
整體圖
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
Singlet and Triplet Exciton hv Singlet ground state Singlet excited state Triplet excited state : Spin up : Spin down
Spin Angular Momentum Vector of Electron with Different Spin States ħ/2 ħ Z ħ Z
Coupling of Spin Angular Momenta of Two electrons θ1θ1 θ0θ0 θ-1θ-1 Σ 1/43/4 Z SingletTriplet
Energy Transfer
Phosphorescent OLED Ref. : M. A. Baldo et al., APL, 75, 4, 1999
OLED Device Structure
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
Bottom Emission OLED
Barix Layer Al 2 O 3 polyacyrlate 使水氣不易進入
Barix Layer
Atomic Layer Deposition (ALD) Al(CH 3 ) 3 (g) + :Si-O-H (s) → :Si-O-Al(CH 3 ) 2 (s) + CH 4
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
AlOx with ALD a a b b c c No passivation ALD passivation Glass lid encap
Outline Introduction OLED display and Lighting PM and AM Driving OLED Fabrication Device Physics Passivation Layer Tandem OLED
Stacked OLED