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Organic upconversion device

A technology of devices and hole transport layers, applied in the direction of electric solid devices, electrical components, circuits, etc., can solve the problems of limited application and low light-to-light conversion efficiency, and achieve improved light-to-light conversion efficiency, high photoelectric conversion efficiency, Effect of improving electro-optic conversion efficiency

Inactive Publication Date: 2018-08-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the light-to-light conversion efficiency of organic up-conversion devices is still relatively low.
The reason is that the device cannot fully absorb and utilize near-infrared photons, which seriously limits its application

Method used

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Examples

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Effect test

Embodiment 1

[0028] An organic up-conversion device in this embodiment, the schematic diagram of its stacked structure is as follows figure 1 shown. The substrate 1, the anode 2, the hole injection blocking layer 3, the photosensitive layer 4, the hole transport layer 5, the light emitting layer 6, the electron transport layer 7, the connection layer 8, the hole transport layer 9, and the light emitting layer 10 are sequentially stacked. , an electron transport layer 11, an injection modification layer 12 and a cathode 13. The schematic diagram of its working principle is as follows: figure 2 as shown ( figure 2 The middle light-emitting layer refers to a tandem light-emitting layer unit composed of light-emitting layer 6 , electron transport layer 7 , connection layer 8 , hole transport layer 9 and light-emitting layer 10 ). Such as figure 2 As shown, when the near-infrared light is incident on the device, the photosensitive layer 4 can absorb the near-infrared light to form excito...

Embodiment 2

[0033] An organic up-conversion device in this embodiment, the schematic diagram of its stacked structure is as follows figure 1 shown. The substrate 1, the anode 2, the hole injection blocking layer 3, the photosensitive layer 4, the hole transport layer 5, the light emitting layer 6, the electron transport layer 7, the connection layer 8, the hole transport layer 9, and the light emitting layer 10 are sequentially stacked. , an electron transport layer 11, an injection modification layer 12 and a cathode 13. The schematic diagram of its working principle is as follows: figure 2 as shown ( figure 2 The middle light-emitting layer refers to a tandem light-emitting layer unit composed of light-emitting layer 6 , electron transport layer 7 , connection layer 8 , hole transport layer 9 and light-emitting layer 10 ).

[0034] The organic up-conversion device of this embodiment is prepared by the following method:

[0035] First put the glass / ITO substrate in a special cleani...

Embodiment 3

[0038] An organic up-conversion device in this embodiment, the schematic diagram of its stacked structure is as follows figure 1 shown. The substrate 1, the anode 2, the hole injection blocking layer 3, the photosensitive layer 4, the hole transport layer 5, the light emitting layer 6, the electron transport layer 7, the connection layer 8, the hole transport layer 9, and the light emitting layer 10 are sequentially stacked. , an electron transport layer 11, an injection modification layer 12 and a cathode 13. The schematic diagram of its working principle is as follows: figure 2 as shown ( figure 2 The middle light-emitting layer refers to a tandem light-emitting layer unit composed of light-emitting layer 6 , electron transport layer 7 , connection layer 8 , hole transport layer 9 and light-emitting layer 10 ).

[0039] The organic up-conversion device of this embodiment is prepared by the following method:

[0040] First put the flexible PET film with ITO as the subst...

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Abstract

The invention belongs to the field of organic photoelectric devices and discloses an organic upconversion device. The organic upconversion device is composed of a substrate, an anode, a hole injectionbarrier layer, a photosensitive layer, a hole transport layer, a light emitting layer, an electron transport layer, a junction layer, a hole transport layer, a light emitting layer, an electron transport layer, an injection modification layer and a cathode which are stacked in sequence. According to the organic upconversion device, an organic blending material with near infrared absorption and capable of separating a free electron hole pair under effects of an external electric field is used as a photosensitive layer material, high photoelectric conversion efficiency is realized, the two light emitting layers are serially connected to further improve the electro-optical conversion efficiency of the device, and thus, the device with a high electro-optical conversion efficiency is finally realized.

Description

technical field [0001] The invention belongs to the field of organic photoelectric devices, and in particular relates to an organic up-conversion device. Background technique [0002] Up-conversion luminescence refers to the continuous emission of light with a wavelength shorter than the excitation wavelength under the excitation of long-wavelength light. It can be done directly by upconverting luminescent materials. The luminescent mechanism of the up-conversion material is that the luminescent center absorbs two or more photons successively, and after non-radiative relaxation reaches the luminescent energy level, it transitions to the ground state and emits a visible photon. Its mechanism mainly includes energy transfer mechanism, two-step absorption mechanism, cooperative brightening mechanism, cooperative luminescence, second-order harmonic and two-photon emission mechanism, etc. It can be seen that the up-conversion efficiency of the up-conversion luminescent material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50
CPCH10K50/00H10K50/15H10K50/156H10K50/171
Inventor 马东阁杨德志周小康
Owner SOUTH CHINA UNIV OF TECH
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