Light emitting device including blue emitting quantum dots and method
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United States of America Patent
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Aug 11, 2020
Grant Date -
Jan 29, 2015
app pub date -
Jul 3, 2014
filing date -
Jan 6, 2012
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Abstract
A method for preparing a light emitting device comprising: disposing an electron-injection layer comprising a metal oxide on a cathode, disposing a first layer adjacent the electron-injection layer, the first layer comprising a small molecule material with a bandgap of at least about 3 eV capable of blocking holes, forming an emissive layer comprising quantum dots capable of emitting blue light upon excitation at a surface of the first layer opposite the electron-injection layer; disposing a second layer comprising a material capable of transporting holes and blocking electrons with a bandgap of at least about 3 eV adjacent a surface of the emissive layer opposite the first layer, and disposing an anode over the second layer. A light-emitting device is also disclosed.
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