A comparison between the EFL of the three-color

The main reason for the Portable Light Manufacturers is that the quantum dots in the QLED light-emitting layer usually have a deep valence band energy level, which does not match the hole transport layer, resulting in too low hole injection efficiency and imbalance with electron injection. But in the past work, the device has the contradiction that the efficiency is too low at high brightness and the brightness is too low at high efficiency.

Figure 3 is a comparison between the EFL of the three-color QLED in this work and the work reported in the literature.9%), the brightness of blue (62,600 cd/m2) and the lifetime of green and blue devices (1. How to make the device maintain high efficiency, long life and high stability while maintaining high brightness is an urgent problem to be solved in the QLED field, and it is also a key technical bottleneck restricting its application in the display and lighting fields.

Moreover, from the perspective of lighting requirements for brightness and efficiency, the three-color QLEDs obtained in this work have all exceeded the corresponding thresholds. Professor Shen Huaibin of Henan University is the first author of the paper. After rapid development in recent years, its main performance indicators such as brightness, external quantum efficiency (EQE) and lifetime have been greatly improved.

It can be seen that the EFL of the green device has doubled, and the red and blue have a nearly magnitude increase. Figure 1 CdSe/ZnSe core-shell structure quantum dot spherical aberration electron microscope and element distribution. The longest record. The research results are expected to accelerate the progress of QLED applications in the high-brightness and high-efficiency display and lighting fields.9%, 8.6; 106 h or more, and the lifespan of blue QLED devices reached more than 7000 h. Figure 2 Red, green and blue QLED device performance In order to more accurately describe the luminous characteristics of the new QLED, the research team introduced a new concept-'Effective Brightness (EFL)' ,