Blue Phosphorescent Organic Light Emitting Device Having a Minimal Lamination Structure
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United States of America Patent
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Aug 21, 2014
app pub date -
Jun 29, 2012
filing date -
Sep 28, 2011
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Abstract
Disclosed is a blue phosphorescent organic light emitting device having a minimal lamination structure. The device includes an anode; an emitting layer formed on the anode and including a host and a dopant; an electron transport layer formed on the emitting layer; and a cathode formed on the electron transport layer. A difference between a work function of the anode and a high occupied molecular orbital (HOMO) energy level of the emitting layer is less than 1.0 eV, and a difference between a low occupied molecular orbital (LUMO) energy level of the emitting layer and an LUMO energy level of the electron transport layer is less than 1.0 eV.
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