Organic light emitting diode
A light-emitting diode, organic technology, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of poor stability, different migration properties, and poor energy utilization of white light organic light-emitting diodes, and achieve the effect of improving luminous efficiency and light stability.
Active Publication Date: 2014-06-25
XIAMEN TIANMA MICRO ELECTRONICS
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Problems solved by technology
[0003] At present, in the white organic light emitting diode (WOLED), because there is no good dark blue phosphorescent material, the stability of the white organic light emitting diode with only phosphorescent light emitting material is poor.
Moreover, there is a problem of utilizing singlet excitons and triplet excitons in the white light organic light-emitting diodes with a phosphorescent / fluorescent hybrid structure, but singlet excitons (fluorescent excitons) and triplet excitons (phosphorescent excitons) ) itself has different energy properties and migration properties, and the charge recombination area moves with voltage, etc.; resulting in complex structure of white light OLED, poor energy utilization, low luminous efficiency, especially the spectrum of the device changes seriously with voltage, and the color stability is not good. good
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[0031] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
[0032] figure 1 It is a schematic structural diagram of an organic light-emitting diode according to the first embodiment of the present invention. Such as figure 1 As shown, the organic light emitting diode 10 includes a substrate 11 , an anode 12 , a hole transport layer 13 , a light emitting layer 14 , an electron transport layer 15 and a cathode 16 which are stacked.
[0033] The light-emitting layer 14 includes a first phosphorescent light-emitting layer 141 , a first spacer layer 142 , a blue fluorescent light-emitting layer 143 , a second spacer layer 144 and a second phosphorescent light-emitting layer 145 stacked along the direction from the anode to the cathode.
[0034] Wherein, the first spacer layer 142 is a hole-conducting and electron-resistance material layer, and the second spacer...
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The invention discloses an organic light emitting diode which comprises a substrate, an anode, a hole transmission layer, a light emitting layer, an electronic transmission layer and a cathode. The light emitting layer comprises a first phosphorescent light emitting layer, a first isolation layer, a blue fluorescence light emitting layer, a second isolation layer and a second phosphorescent light emitting layer, wherein the first phosphorescent light emitting layer, the first isolation layer, the blue fluorescence light emitting layer, the second isolation layer and the second phosphorescent light emitting layer are stacked along the direction from the anode to the cathode. The first isolation layer is a guide hole resistivity electronic material layer. The second isolation layer is a guide electronic resistivity hole-type material layer. According to the invention, an exciton recombination region is defined in the blue fluorescence light emitting layer, thus the light emitting efficiency and the light stability of the light emitting diode are improved.
Description
technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an organic light emitting diode. Background technique [0002] Organic light-emitting diode (OLED) technology, which uses organic thin films to emit light when a voltage is applied, is increasingly used in flat-panel displays, lighting and backlighting. [0003] Currently, among white organic light-emitting diodes (WOLEDs), there is no good dark blue phosphorescent material, and the white organic light-emitting diode with only phosphorescent light-emitting materials has poor stability. Moreover, there is a problem of utilizing singlet excitons and triplet excitons in the white light organic light-emitting diodes with a phosphorescent / fluorescent hybrid structure, but singlet excitons (fluorescent excitons) and triplet excitons (phosphorescent excitons) ) itself has different energy properties and migration properties, and the charge recombination area moves with voltage,...
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IPC IPC(8): H01L51/50H10K99/00
CPCH01L51/0081H01L51/0085H01L51/504H01L51/0059H01L51/5044H01L51/0072H10K85/631H10K85/6572H10K85/324H10K85/342H10K50/131H10K50/13
Inventor 林文晶
Owner XIAMEN TIANMA MICRO ELECTRONICS