PLEDs use semiconducting polymers that emit light when electric current is applied. They can be used to create more efficient LED displays, especially for portable devices due to their flexibility. A PLED consists of a thin film of conjugated polymer sandwiched between an anode and cathode. When voltage is applied, the polymer emits light. PLEDs have advantages over LCDs like lower power consumption, thinner displays, and flexible substrates. However, they have shorter lifetimes at high brightness and are sensitive to oxidation and humidity.

1. POLYMER LIGHT EMITTING DIODE
PLEd
-By
J.PRANAY
J.NIKHIL KUMAR

2. What do you mean by pled???
 In light emitting diodes by using polymers we
can make more efficient LED displays.
 These are majorly very useful for the displays
of portable devices like mobile phones,
laptops,etc.
 In PLEDs we use special type of polymer called
π-conjugated polymer which has
semiconducting properties.
 Polymers are chains of smaller molecular
components called MONOMERS.

3. HISTORY OF PLEDs
 1953: electroluminescence in organic materials was
observed
 1987: first OLED with driving voltage of 10V
 1989: discovery of π-conjugated polymers
 The making first PLED is credited to the Cavendish
laboratory Of Cambridge university in 1989.
 Polyphenylene vinylene (PPV) is the first LEP discovered
 Beginning of intensive research because of the advantages
of polymers

4. PLED as a special type of OLED
 semiconducting properties
• π-conjugated polymer

5. ARCHITECTURE……
 Thin film of semiconducting
polymer is sandwiched between an
anode and cathode.
 ANODE: ITO(INDIUM TIN OXIDE)
 CATHODE: Metals(depends upon
depends upon ).
 SUBSTRATE: Glass , clear plastic
(depends upon depends upon).
 Voltage is applied between anode
and cathode.
Metal Cathode
Polymer
Glass Substrate
Transparent Anode (ITO)

6. Flexible packaging material
Electrode
Flexible electrode
Emitting layer ⇒ Flexible
Semiconducting polymer
Substrate⇒ Flexible !!
(Glass → Plastic)
Flexible Display

7. TYPES OF LEP……(PLED)
 Flexible Organic Light Emitting
Polymers(FOLEP).
 Stacked Organic Light Emitting
Polymers(SOLEP).
 Transparent Organic Light
Emitting Polymers(TOLEP)

8. TRANSPARENT ORGANIC LEP(TOLEP)
 Substrate is transparent.
 LEPs sandwiched between two transparent layers.
 Top and Bottom emitting layers.
 Better efficiency.
 Fast response.

9. FLEXIBLE ORGANIC LEP(FOLEP)
 Built on flexible substrate.
 They have the ability to confirm, bend or roll a display
into any shape.
 Ultra lightweight and thin form.
 They are less fragile and more impact resistant.

10. STACKED ORGNAIC LEP(SOLEP)
 Array of vertically stacked TOLEP Sub-pixels.
 Color is tuned by individually controlling R-G-B
subpixels.
 It will only turn on the desired color pixel only.
 Can be used in large displays.
 True color quality.

11.  Screen refreshing rates
 Viewing quality
 Screen size
 Viewing angle
 Power consumption
 Higher than LCD
 Higher than LCD
 Size is not limited in PLED display
 Glare free up to 180 degrees
 Lesser than LCD
COMPARISONWITHLCD

12. ADVANTAGES ….
 Low production cost
 Low power consumption
 Very thin displays
 Large viewing angle
 Simple to use
 Short response time
 Flexible & Robust

14. DRAWBACKS…
 Emitter is sensitive to oxidation and humidity
 Short lifetime at high luminescence..

15. APPLICATIONS…
 Displays
Multi or Full color Cell phone displays
Television
Laptop
 Lightweight Wrist watches.
 Automobile light systems without bulbs.
 Roll-up refreshable e-newspaper.

16. LAPTOPS……

17. TELEVISIONS…

18. CONCLUSION…..
 Have both electrical and optical property
 A low cost solution for flat panel display.
 Many manufactures are working to introduce a
revolutionary changes in the market.
 Hazardless to environment.
 Simpler and cheaper.
 Have some limitations.

19. THANK YOU

20. ANY QUERIES