Organic light emitting device including a multi-layer light emitting structure and an organic light emitting display including the organic light emitting device
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United States of America Patent
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Oct 10, 2017
Grant Date -
Apr 9, 2015
app pub date -
Aug 22, 2014
filing date -
Oct 4, 2013
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Abstract
An organic light emitting device including a first electrode connected to a thin film transistor formed on a substrate, a second electrode opposite to the first electrode, and an organic laminate formed between the first electrode and the second electrode and including a hole transport layer, a multilayer-light emitting structure, and an electron transport layer. The multilayer-light emitting structure includes at least two light emitting layers emitting light of different colors through recombination of electrons and holes injected through the first and second electrodes, and a charge transport control layer formed of a bipolar material transporting both electrons and holes at boundaries between the at least two light emitting layers and controlling the amount of charges transported between the at least two light emitting layers.
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