OLED
:Organic Light Emitting Diode
Organic means…
→Electroluminescent layer is
:a film of organic compound
(ex. C2, H2, O2, other polymers)
not semiconductor →used in LED
1.Self-luminescence
The biggest difference between LCD is that it is self-luminescence. It means that the diode can emit the light itself so it has the good visibility although there is ligh
Conjugated organic semiconductors
Expansion or contraction of the polymers by mobile solvated ions
Applied to several microsystems and actuated catheters, circulation pumps, etc.
Low level charge injection Quantum mechanical effects dominate
High level charge injection Coulomb forces dominate
Repulsive force between same charges
Discharging process
wh
B. Solution-Liquid-Solid Growth of Indium Phosphide Fibers from Organometallic Precursors: Elucidation of Molecular and Nonmolecular Components of the Pathway
Solution-phase organometallic syntheses of semiconductors are used for the growth of high-quality quantum dots,1-3 and are potentially useful for the deposition of semiconductor materials on thermally sensitive substrates such as polymers
in π bond are less influenced by nuclear relatively.
The overlap of molecular orbitals (MO’s) in organic semiconductors
lead to a formation of bands with a width W.
When an electron breaks a covalent bond of an intrinsic crystal structure and more away, a vacancy is created in the broken covalent band . The vacancy so caused constitute a hole and is represented by a small circle.
emitting property of
some organic chemicals. Has been the basis of most commercial products to
date.
What is Hybrid LED?
Hybrid LED compensate
the defect of OLED
Good color
Improved power efficiency
Low cost, large area
Flexibility
Hybrid LED made by inorganic/organic
material which has heterostructure
Usually, consisting of metal (or oxide)
and polymer