Patent ID: 7071614

Claim:
An efficient organic light emitting diode device comprising: a stack of thin film organic layers and metal layers; said thin film layers further comprising a cathode layer followed by an electron transport layer followed by a hole modulating conductive layer followed by a fluorescent or phosphorescent doped light emitting host layer followed by an electron modulating conductive layer followed by a hole transport layer followed by a hole injection layer followed by an anode layer and finally followed by a thick transparent substrate, all remaining in intimate contact with each other; said stack hermetically sealed; means for externally connecting and applying voltage to said anode, cathode, electron modulating conductive layer and hole modulating conductive layer; said electron modulating conductive layer functioning as electron modulating electrode, preventing electrons from leaving the light emitting host layer; said hole modulating conductive layer functioning as hole modulating electrode, preventing holes from leaving the light emitting host layer; said electron modulating electrode, hole modulating electrode, cathode and anode with suitable voltages generating light efficiently in the host layer.