Patent ID: 8816329
Filing Date: 2014-08-26
Classification: H01L

Abstract:
1. A radiation-emitting device for emitting cold white electromagnetic radiation comprising a mixture of at least three different partial radiations of a blue, a red, and a green wavelength range, the device comprising: a substrate; a first electrode and a second electrode; at least one first layer sequence arranged between the first and second electrodes, the first layer sequence comprising: at least one second layer sequence arranged between the first and second electrodes, the second layer sequence comprising: blocking layers to selectively block singlet excitons, the blocking layers being arranged between the at least one first layer and the at least one second layer and between the at least one second layer and the at least one third layer of the first layer sequence, and between the at least one first layer and the at least one second layer and between the at least one second layer and the at least one third layer of the at least one second layer sequence, at least one interlayer arranged between and the at least one first layer sequence and the at least one second layer sequence, the at least one interlayer, being free of emitter material that emits electromagnetic radiation in the visible range at the voltage applied during operation of the radiation-emitting device.