07-05-2012, 03:27 PM
LIGHT EMITTING POLYMER
LEP ppt.pptx (Size: 604.67 KB / Downloads: 44)
INTRODUCTION
LEP is an emissive technology that emits light as a function of electrical operation.
It exhibits electroluminescent characteristics.
It emits light under the application of electric field. E.g- polyvinyl chloride.
Polymer based LEP was discovered in 1990
CONDUCTING POLYMERS
Three type of conducting polymer are there
1.conductor(bg-1ev)
2.semiconductor(bg-2.2ev)
3.insulator(bg-10ev)
Structure of LEP
LEP consists of a thin film of polymer sandwiched between an anode and a cathode.
Indium tin oxide(ITO) is usually as anode.
Metals are used as cathode.
How LEP works
Electric field is applied between two electrodes.
The electrons are injected from cathode and holes from anode.
The injected charges recombined & decay radiatively.
LEP ppt.pptx (Size: 604.67 KB / Downloads: 44)
INTRODUCTION
LEP is an emissive technology that emits light as a function of electrical operation.
It exhibits electroluminescent characteristics.
It emits light under the application of electric field. E.g- polyvinyl chloride.
Polymer based LEP was discovered in 1990
CONDUCTING POLYMERS
Three type of conducting polymer are there
1.conductor(bg-1ev)
2.semiconductor(bg-2.2ev)
3.insulator(bg-10ev)
Structure of LEP
LEP consists of a thin film of polymer sandwiched between an anode and a cathode.
Indium tin oxide(ITO) is usually as anode.
Metals are used as cathode.
How LEP works
Electric field is applied between two electrodes.
The electrons are injected from cathode and holes from anode.
The injected charges recombined & decay radiatively.