Light emissive device having electrode comprising a metal...

Details Light emissive device having electrode comprising a metal... Light emissive device having electrode comprising a metal...

2005-08-10

2011-11-01

Walford, Natalie (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C427S066000, C204S192120, C313S483000, C313S498000, C313S499000, C313S500000, C313S501000, C313S502000, C313S503000, C313S505000, C313S506000

Reexamination Certificate

active

08049408

ABSTRACT:
An organic light emissive device comprising: a first electrode; a second electrode; and an organic light emissive region between the first and second electrodes comprising an organic light emissive material which has a peak emission wavelength, wherein at least one of the electrodes is transparent and comprises a composite of a charge injecting metal and another material which is codepositable with the charge injecting metal, the other material having a different refractive index to that of the charge injecting metal and wherein the other material has a lower degree of quenching at the peak emission wavelength than the charge injecting metal whereby quenching of excitons by the at least one electrode is reduced, the charge injecting metal comprising either a low work function metal having a work function of no more than 3.5 eV or a high work function metal having a work function of no less than 4.5 eV.

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