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White emission via electroplex formation at poly (N-vinylcarbazole)/2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline interface
Applied Surface Science 236 (2004) 251-255，-0001，（）：
The photoluminescence (PL) and electroluminescence (EL) properties of OLEDs based on poly(N-vinylcarbazole)(PVK) and 2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline (BCP) have been studied. A new emission at 595 nm has been observed in EL spectra but not in PL spectra of the devices.We suggest the new emission originates from the electroplex occuring at PVK-BCP interface. White emission via electroplex has been obtained in all the OLEDs. CIE coordinates of device ITO/PEDOT:PSS/PVK/BCP/Alq3/LiF/Al is (0.31, 0.33) at 18 V. Alq3 layer plays an important role in tuning the recombination zone and enhancing the electroplex emission.
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