Organic light-emitting device, and method for improving brightness uniformity
An electroluminescent device and luminescent technology, applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of different current and brightness of OLED panels, little effect, limited conductivity, etc., and achieve easy industrial production , reduce the impact, increase the effect of internal resistance
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Embodiment 1
[0039] An embodiment of the present invention provides an organic electroluminescent device, figure 1 Shown is a schematic diagram of the layered structure of the organic electroluminescent device, figure 2 It is the principle diagram of the organic electroluminescence. Such as figure 1 and figure 2 As shown, the device includes a conductive substrate, the conductive substrate includes a substrate 10 and a first electrode layer 20 arranged on the substrate, the conductive substrate is divided into a light-emitting area and a non-light-emitting area; on the light-emitting area An organic functional layer 40 and a second electrode layer 50 are stacked, an auxiliary electrode 30 electrically connected to the first electrode 20 is arranged on the non-light-emitting area, an insulating layer 60 is also arranged on the auxiliary electrode 30, the first The electrode 20 and the second electrode 50 are used to access power. For organic electroluminescent screens, the uniformity ...
Embodiment 2
[0055] This embodiment also provides a method for improving the brightness uniformity of the organic electroluminescent device described in Embodiment 1. The method for improving brightness uniformity includes: adjusting the path resistance R of the auxiliary electrode a , The path resistance R from the injection point of the auxiliary electrode to the point farthest from the injection point in the light-emitting area b and the equivalent resistance R of the electroluminescent device OLED , so that it satisfies formula (1):
[0056]
[0057] To achieve the auxiliary electrode path resistance R a , The path resistance R from the injection point of the auxiliary electrode to the point farthest from the injection point in the light-emitting area b and the equivalent resistance R of the electroluminescent device OLED Satisfy formula (1), on the one hand, by improving R to a certain extent OLED The resistance value of the formula (1) can be satisfied to improve the brightne...
example 1
[0065] On the basis of Comparative Example 1, OLED devices 1-3 respectively use the LUMO energy level of the electron transport layer material ETL2 as -2.6eV, the LUMO energy level of the electron transport layer material ETL3 as -2.1eV, and the LUMO energy level of the electron transport layer material ETL4. The energy level is -1.6eV, because the internal resistance of the device is increased, so that the voltage and current of OLED device 1 are 6V and 20mA respectively; the voltage and current of OLED device 2 are 8V and 20mA respectively; the voltage and current of OLED device 3 are respectively 10V and 20mA.
[0066] The equivalent resistance R of OLED device 1 in this kind of lighting state OLED1 is 300 ohms, the current ratio of the two input points is calculated as 14.27%, and the calculation process is as follows:
[0067] (6 / (0.1+300)-6 / (50.05+300)) / (6 / (0.1+300))×100%=14.27%
[0068] By adopting the organic electroluminescence method of the embodiment of the presen...
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