Stacked organic electroluminescent devices
A light-emitting device comprises a stack of organic electroluminescent (EL) elements, wherein an organic EL element in the stack overlaps at least a portion of another organic EL element, and the organic EL elements are electrically separate. Each of the organic EL elements of the stack is activated with a different level of voltage.
General Electric Company
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Jie Joseph John Anil Raj
Liu Shiang Duggal