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Series quantum dot device with double-sided light output

A quantum dot device, double-sided light emission technology, applied in the direction of semiconductor devices, electric solid devices, semiconductor devices of light-emitting elements, etc., can solve the problem of low color purity and so on

Inactive Publication Date: 2020-02-18
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention can solve the problem of low color purity in the double-sided display of the OLED display screen, and improve the double-sided color gamut

Method used

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  • Series quantum dot device with double-sided light output
  • Series quantum dot device with double-sided light output
  • Series quantum dot device with double-sided light output

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Embodiment 1

[0028] The present invention proposes a tandem light-emitting device ( Figure 4 ), and two diode units are connected in series to obtain a double-sided light-emitting device. It includes the upper top-emitting OLED device and the lower bottom-emitting QLED device. The metal reflective electrode is not only the cathode of the QLED device, but also the anode of the OLED device. In order to improve the performance of reflected light, the thickness is between 40nm and 150nm.

[0029] In this way, the light spectrum of the upper OLED device is narrowed due to the microcavity effect of the top-emitting device; while the light spectrum of the lower QLED device is narrowed because of the light emission of the quantum dot itself. In general, the above two sides can be obtained. Very high color purity.

[0030] For circuit connections ( Figure 5 ), by directly adding batteries in series; or by supplying external power (DC or AC). When an external power supply is connected ( Figur...

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Abstract

The invention discloses a series quantum dot device with double-sided light output. The series quantum dot device comprises an upper top emitting OLED device and a lower bottom emitting QLED device. The top emitting OLED device and the bottom emitting QLED device are connected in series with each other. The metal reflective electrode is both the cathode of QLED device and the anode of OLED device.The scheme for constructing an OLED double-sided display screen can effectively solve the problem of poor color gamut of the display screen due to transparent display.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a tandem quantum dot device that emits light from both sides. Background technique [0002] Double-sided display devices and panels are eager to be widely used in display and lighting devices, but there are problems such as low color purity of double-sided display, relatively complex structure, and urgent optimization of driving schemes. [0003] The intrinsic spectrum of the bottom-emitting OLED device is broad ( figure 1 ), the spectrum has shoulder peaks, the spectrum cannot be narrowed, and the color purity is not good. Top-emitting OLED device structure, that is, the light of the organic light-emitting layer exits from the cathode side, and the cathode has a certain degree of impermeability, thereby forming an optical microcavity between the electrodes. Demand for high color purity. Therefore, top-emitting OLED devices can achieve high color purity performanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L27/32F21K9/20F21Y115/15
CPCF21K9/20F21Y2115/15H10K59/128H10K50/805H10K2102/3031
Inventor 熊志勇崔忠杰杨波波解凤贤张万路郭睿倩张国旗
Owner FUDAN UNIV