OLED (Organic Light Emitting Diode)

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OLED (Organic Light Emitting Diode)
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OLED (Organic Light Emitting Diode)

• OLED ?? ?? ????
• ??

??? (Inorganic) ??? ??? ?? ??? (Organic )
??(carbon)? ???? ?????
?? ?? ??

• ?? (Light Emitting)

?? ?? ??? ?? ?? (?, LCD) ?? ?? ?? ????
??(self) ?? (?, OLED)

• ???? Ohm? ??? ??? ?? ????

• ????
• ?? ????? ????? ??

• Ohm? ??

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OLED (Organic Light Emitting Diode) ??

• ???? ?? (?? ???? ??)
• ?? ????, (?????)
• ?? ????, (Einstein ???? ??, ??? camera, ???)
• ?? ????, (??? ????)

?? ??? ????? ??? ?????
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OLED? ????? (Polymer)
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OLED ?????
NPB
Phthalocyanine
Znq2
Liq
Naq
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Solid State Solvation Effect
High DCM2
Bulovic et al. Chem. Phys. Lett. 287, 455(1998)
308, 317(1999)
Alq3
EL Spectrum Tuning
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OLED (Organic Light Emitting Diode) ??

• ?? ?? ??

Electron transfer To the acceptor site
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OLED (Organic Light Emitting Diode) ??
?? (cathode)
?????
????
?
??(anode)
?? (hole)
? ???? ?? ? ?? (Photoluminescence, PL)

• ??-??? pair exciton
• Exciton ?? ? ? ??? ??

? ??
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OLED ??
Electroluminescence (EL)
Photoluminescence (PL)
?? (electron)
?
? ???
? ??
?? (hole)
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OLED Cell
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Passive Matrix Organic LED
Relatively Small Display Weak for Multicolor
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Monochrome Passive-Matrix Polymer-LED Display
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Active Matrix Organic LED
GATE

• ?? EL ??
• Gate Line ?? ??
• TFT Turn-on
• ??? ??????
• LED ??
• ?? ?? ??

Capacitor
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Transparent Flexible Transistor
Transparent
Flexible
Substrate
polyimide
Insulator
polyvinylphenol
Semiconductor
polythienylenevinylene
Electrodes
poyaniline
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Full-Color OLED Display
Active Matrix
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Applications of Organic LED
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FOLED-based Pixelated, Monochrome Display
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Technology Landscape
Beautiful!!!
Technology/ Features AMLCD PMLCD LED PDP FED OLED
Brightness Good Good Very Good Good Good Very Good
Resolution High High Low Medium High High
Voltage Low Low High High High Low
Viewing Angle Medium Poor Excellent Excellent Excellent Excellent
Contrast Ratio Good Fair Good Poor-Good Good Excellent
Response Time Good Good Fast Very Fast Very Fast Very Fast
Power efficiency Good Good Fair-Good Medium Very Good Very Good
Temp. Range Poor Poor Very Good Very Good Very good Very good
Form Factor Thin Thin Wide Wide Thin Very Thin Conformable
Weight Light Light Above Avg. Heavy Light Light
Screen Size Small-Large Small-Medium Small-Large Large Medium Small-Large
Primary Applications Laptops, Desktop Small Display Signs, indicators Large Screen Multiple Multiple New/ Existing
Cost Average Low High High Average Below Avg.
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Organic EL Research Trend Future
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PLED (Polymer Light Emitter Diode)
2000? Nobel ???? ??