White organic light emitting device with single light emitting layer structure
A technology for electroluminescent devices and light-emitting layers, applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of complex preparation process, color drift, high cost, etc., achieve simplified device structure, reduce preparation cost, improve color Effects of Degree Stability and Efficiency Stability
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[0018] Example one:
[0019] In this embodiment, see figure 1 , A white light organic electroluminescent device with a single light emitting layer structure, its structure is mainly composed of ITO glass substrate 1, hole transport layer 2, electron blocking layer 3, light emitting layer 4, electron transport layer 5 and composite cathode 6, The light-emitting layer 4 is composed of a host-guest doping system to form a single-layer light-emitting layer. The host material of the light-emitting layer 4 is 1,3-bis (9-carbazolyl) benzene, namely mCP, 2,6-bis(N-carbazolyl) pyridine , Namely mCPy, the guest material constituting the light-emitting layer 4 is platinum [1,3-difluoro-4,6-di (2-pyridinyl) benzene] chloride, namely Pt-4, and the guest material doping concentration is 8 wt%, The emission spectrum includes both blue light peak and red light peak. Blue light and red light are mixed to form white light. The thickness of the light-emitting layer 4 is 20 nm. The single light-em...
Example Embodiment
[0020] Embodiment two:
[0021] This embodiment is basically the same as the first embodiment, and the special features are:
[0022] In this embodiment, the host material in the light-emitting layer 4 is mCPy, and the guest material is platinum (II)[1, 3-difluoro-4,6-di(2-pyridinyl)benzene]chloride, that is, the FPt doping concentration is 12 wt%, the material of the electron blocking layer is TCTA, and the material of the electron transport layer is 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline), which is BCP. The white light emitted by the organic electroluminescent device of this embodiment has high brightness, high efficiency, high color purity and stable chromaticity.
Example Embodiment
[0023] Embodiment three:
[0024] This embodiment is basically the same as the previous embodiment, and the special features are:
[0025] In this embodiment, the host material in the light-emitting layer 4 is mCP, and the guest material is platinum N^C2^N-[1,3-di(4-methoxy-pyrid-2-yl)-4,6-difluorobenzene] chloride , Namely PtL 26 Cl, doping concentration is 20 wt%, electron blocking layer material is TCTA, and electron transport layer material is TPBI. The white light emitted by the organic electroluminescent device of this embodiment also has the characteristics of high brightness, high efficiency, high color purity and stable chromaticity.
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