Patent classifications
H
ELECTRICITY
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H10
SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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H10K
ORGANIC ELECTRIC SOLID-STATE DEVICES
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50/00
Organic light-emitting devices
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H10K50/10
OLEDs or polymer light-emitting diodes [PLED]
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H10K50/11
characterised by the electroluminescent [EL] layers
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H10K50/125
specially adapted for multicolour light emission, e.g. for emitting white light
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H10K50/13
comprising stacked EL layers within one EL unit
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H10K50/131
with spacer layers between the electroluminescent layers
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