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Organic photovoltaic cell based on Cu (I) complex triplet state material

A technology of organic photovoltaic cells and complexes, which is applied in photovoltaic power generation, organic chemistry, and compounds of Group 5/15 elements of the periodic table, etc., which can solve the problems of high cost, short diffusion length of photogenerated excitons, and complex preparation process of inorganic solar cells and other problems, to achieve the effect of easy operation and simple preparation method

Inactive Publication Date: 2014-05-21
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems in the background technology that the preparation process of inorganic solar cells is complicated, the cost is high, it is not suitable for large-area and flexible substrate cells, and the diffusion length of photo-generated excitons in organic solar cells is relatively short, the purpose of the present invention is to combine a A Cu(I) complex triplet material with a long triplet lifetime is used in organic photovoltaic cells to extend the exciton diffusion length. The synthesis method is simple and the battery is easy to prepare

Method used

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  • Organic photovoltaic cell based on Cu (I) complex triplet state material
  • Organic photovoltaic cell based on Cu (I) complex triplet state material
  • Organic photovoltaic cell based on Cu (I) complex triplet state material

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Embodiment 1

[0023] select figure 2 The battery structure shown. In this embodiment, firstly, an electron donor layer CuPc with a thickness of 15-20 nm is vacuum-deposited on the ITO conductive glass; then, on the electron donor layer 2, the electron donor CuPc and Cu ( I) The mixed layer 3 of the complex has a thickness of 5 nm, and then an electron acceptor layer 4 is deposited on the mixed layer 3 with a thickness of 40 nm; finally, the cathode is made of metal Al material with a thickness of 120 nm. All the above thin films are deposited by vacuum coating process. The thickness of the film is monitored by a film thickness monitoring instrument, and the external circuit is detected by KEITHLEY2601.

[0024] Effect: with a light intensity of 100 mW / cm 2 Under the irradiation of the solar simulator, the obtained current density is 5.57 mA / cm 2 , the open circuit voltage is 0.385 V, the fill factor is 0.384, and the photoelectric conversion efficiency is 0.833%.

Embodiment 2

[0026] On the basis of Example 1, an electron donor layer CuPc with a thickness of 15 to 20 nm is vacuum deposited on the ITO conductive glass, and then electron donor CuPc and Cu with a weight ratio of 100:3 are deposited on the electron donor layer 2 ( I) The mixed layer 3 of the complex has a thickness of 5 nm, and the other fabrication conditions remain unchanged.

[0027] Effect: with a light intensity of 100 mW / cm 2 Under the irradiation of the solar simulator, the obtained current density is 6.213 mA / cm 2 , the open circuit voltage is 0.390 V, the fill factor is 0.379, and the photoelectric conversion efficiency is 0.920 %

Embodiment 3

[0029] On the basis of Example 1, an electron donor layer CuPc with a thickness of 15 to 20 nm was vacuum deposited on the ITO conductive glass, and then electron donor CuPc and Cu with a weight ratio of 100:5 were deposited on the electron donor layer 2 ( I) The mixed layer 3 of the complex has a thickness of 5 nm, and the other fabrication conditions remain unchanged.

[0030] Effect: with a light intensity of 100 mW / cm 2 Under the irradiation of the solar simulator, the obtained current density is 3.157 mA / cm 2 , the open circuit voltage is 0.457 V, the fill factor is 0.374, and the photoelectric conversion efficiency is 0.538%.

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Abstract

The invention belongs to the fields of materials and devices of organic photovoltaic cells, and particularly relates to an organic photovoltaic cell which has long triplet state service life and takes a Cu (I) complex phosphorescent material as the component of a doping agent. The organic photovoltaic cell comprises indium tin oxide (ITO) conductive glass (1), an electronic donor layer (2) deposited on the ITO conductive glass (1) in a vacuum way, a mixed layer (3) deposited on the electronic donor layer (2) in a vacuum way, an electronic acceptor layer (4) and a cathode (5), wherein the mixed layer (3) is used for mixing an electronic donor CuPc and a Cu (I) complex. The organic photovoltaic cell can be used for prolonging the length of excition diffusion, and is simple in synthesis method and easy to prepare.

Description

technical field [0001] The invention belongs to the field of materials and devices of organic photovoltaic cells, and in particular relates to an organic photovoltaic cell in which a Cu(I) complex phosphorescent material with long triplet lifespan is used as a dopant component. Background technique [0002] Compared with traditional inorganic photovoltaic cells, the preparation process of organic photovoltaic cells is simple, and it has the advantages of large manufacturing area, low cost, simplicity, and flexibility. In 1986, Tang reported a single donor-acceptor heterojunction organic solar cell. Because of its potential broad application prospects, academia and business circles have launched in-depth research on organic photovoltaic cells. The current study found that the diffusion distance of excitons is only 10 nm, so the effective thickness of the film in the bilayer structure is about 20 nm. Therefore, the carriers need to travel a certain distance in the two layers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46C07F9/50
CPCY02E10/549
Inventor 车广波高林刘春波徐占林苏斌李秀颖李文连
Owner JILIN NORMAL UNIV
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