Patent ID: 8524526
Filing Date: 2013-09-03
Classification: H01L

Abstract:
1. A method of making an electrode for use in an organic light emitting diode (OLED) device, the method comprising: sputter-depositing a first layer comprising indium tin oxide (ITO) on a glass substrate; sputter-depositing a second layer comprising ITO on the glass substrate over and directly contacting the first layer comprising ITO to form an electrode structure, so that the first layer comprising ITO is located between at least the substrate and the second layer comprising ITO in the electrode structure, wherein as sputter-deposited the first layer comprising ITO is more oxided than is the second layer comprising ITO; and heat treating the electrode structure including the glass substrate and the first and second layers comprising ITO at temperature(s) of at least about 400 degrees C. in order to increase work function of ITO in the electrode structure and increase visible transmission of the electrode structure.