A blue organic light emitting diode (OLED) with rather stability was realized by using a new blue emitting material. In this device

copper phthalocyanine (CuPc) was chosen as a buffer layer

N

N’-bis-(1-naphthy1)-N

N’-diphenyl-1

1’-biphenyl-4-4’-diamine (NPB) was used as the hole transporting layer

9

10-bis(3’5’-diaryl)phenyl anthracene (JBEM) was used as the emitting layer

in which peryrene was doped

then Alq was used as the electron transporting

MgAg alloy as the cathode. The structure of blue device was ITO/CuPc/NPB/JBEM:Peryrene/Alq/MgAg. Based on the blue device

a white device was constructed in which both perylene and DCJTB were doped in the emitting layer JBEM

the structure was ITO/CuPc/NPB/JBEM:Peryrene:DCJTB/Alq/MgAg. The luminance

chromaticity and EL spectra of the OLED cells were measured with PR-650 Spectrascan Spectra Colorimeter. The characteristic of current-voltage was measured by using a Keithley 2400 Source Meter. Operation of the encapsulated EL cell was conducted at room temperature using a DC voltage current source in the constant current mode. For the blue device

maximum luminance of 7526cd/m

2

the luminance of 408cd/m

2

under current density of 20mA/cm

2

maximum efficiency 1.45 lm/W

the half decay time of 1035h at initial luminance of 100cd/m

2

were achieved. The white OLED shows the CIE coordinates

x

=0.32

y

=0.38 and the independence of CIE coordinates on the current density. The maximum luminance of 14852cd/m

2

the luminance of 878cd/m

2

under current density of 20mA/cm

2

maximum efficiency of 2.88 lm/W and half decay time of 2860h at initial luminance of 100cd/m

2

were obtained.