Task: Sentence Expansion
Input (English): Organic light-emitting diode ( OLED ) is a type of light-emitting diode ( LED ) .
Output (English): An organic light-emitting diode ( OLED or Organic LED ) , also known as an organic EL ( organic electroluminescent ) diode , is a light-emitting diode ( LED ) in which the emissive electroluminescent layer is a film of organic compound that emits light in response to an electric current .