Patent ID: 7911129

Claim:
Organic pin-type light-emitting diode comprising an electrode and a counter-electrode and a stack comprising organic layers between the electrode and the counter-electrode, wherein the stack comprising the organic layers comprises: an emission layer comprising k (k=1, 2, 3, . . . ) organic matrix materials; a doped charge carrier transport layer, which is arranged between the electrode and the emission layer; an additional doped charge carrier transport layer, which is arranged between the counter-electrode and the emission layer; and a block layer, which is arranged between the doped charge carrier transport layer and the emission layer; wherein the organic layers of the stack are formed by means of n (n≦k+2) organic matrix materials, n is the overall number of the matrix materials, the n organic matrix materials also comprise the k organic matrix materials of the emission layer, k is the number of the organic matrix materials used in the emission layer, and wherein the doped charged carrier transport layer or the additional doped charged carrier transport layer comprises at least one acceptor molecule stronger than F4-TCNQ.