Organic thin-film solar cell based on dual cathode buffer layers and preparation method of organic thin-film solar cell

A cathode buffer layer, solar cell technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve problems such as changing exciton quenching and carrier transport, reduce energy level barriers, optimize energy level matching, The effect of improving collection efficiency

Inactive Publication Date: 2015-11-25
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, simply adding an electron buffer layer cannot change the problems of exciton quenching and carrier transport very well.

Method used

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  • Organic thin-film solar cell based on dual cathode buffer layers and preparation method of organic thin-film solar cell
  • Organic thin-film solar cell based on dual cathode buffer layers and preparation method of organic thin-film solar cell
  • Organic thin-film solar cell based on dual cathode buffer layers and preparation method of organic thin-film solar cell

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Embodiment 1

[0042] The structure of organic solar cells such as figure 1 shown. The material, thickness and doping ratio of each layer of the device are as follows: the transparent substrate is glass, the transparent anode electrode is ITO, and the thickness is 180nm; the anode modification layer is MoO 3, the thickness is 10nm; the donor layer is ZnPC, the thickness is 30nm; the acceptor layer is C 60 , with a thickness of 34nm; the first electron buffer layer is BCP, with a thickness of 10nm; the second cathode modification layer is PTCBI, with a thickness of 1nm; the cathode electrode is Ag, with a thickness of 130nm.

[0043] Its preparation method is as follows:

[0044] ① The glass substrate on which the transparent anode electrode ITO has been sputtered is ultrasonically cleaned with detergent, deionized water, acetone solution and ethanol solution, and dried with dry nitrogen after cleaning;

[0045] ② Move the above-mentioned ITO substrate into a vacuum chamber, and conduct pl...

Embodiment 2

[0053] The structure of organic solar cells such as figure 1 shown. The material, thickness and doping ratio of each layer of the device are as follows: the transparent substrate is glass, the transparent anode electrode is ITO, and the thickness is 180nm; the anode modification layer is MoO 3 , the thickness is 10nm; the donor layer is ZnPC, the thickness is 30nm; the acceptor layer is C 60 , with a thickness of 34nm; the first electron buffer layer is BCP, with a thickness of 10nm; the second cathode modification layer is PTCBI, with a thickness of 2nm; the cathode electrode is Ag, with a thickness of 130nm. The preparation process is basically similar to Example 1.

Embodiment 3

[0055] The structure of organic solar cells such as figure 1 shown. The material, thickness and doping ratio of each layer of the device are as follows: the transparent substrate is glass, the transparent anode electrode is ITO, and the thickness is 180nm; the anode modification layer is MoO 3 , the thickness is 10nm; the donor layer is ZnPC, the thickness is 30nm; the acceptor layer is C 60 , with a thickness of 34nm; the first electron buffer layer is BCP, with a thickness of 10nm; the second cathode modification layer is PTCBI, with a thickness of 3nm; the cathode electrode is Ag, with a thickness of 130nm. The preparation process is basically similar to Example 1.

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Abstract

The invention discloses an organic thin-film solar cell based on dual cathode buffer layers and a preparation method of the organic thin-film solar cell. The organic thin-film solar cell adopts a positive structure and sequentially comprises a transparent substrate, a transparent anode electrode, an anode modification layer, a donor layer, an acceptor layer, a first electron buffer layer, a second electron buffer layer and a cathode electrode, wherein the second electron buffer layer is bis-benzimidazolone (PTCBI). Through blocking of two buffer layers, the electron density of C60 and the first electron buffer layer and the polaron density of the first buffer layer and a metal cathode are reduced, excitonic quenching caused by polarons is reduced, meanwhile, energy level barrier is reduced, optical field distribution is optimized, and exciton recombination probability is prevented. By the organic thin-film solar cell, filling factor, optical current and open-circuit voltage of a solar cell are favorably improved, and finally, photoelectric conversion efficiency is improved.

Description

technical field [0001] The invention belongs to the field of organic solar cells, and in particular relates to an organic thin film solar cell based on a double-layer cathode buffer layer and a preparation method thereof. Background technique [0002] Since entering the 21st century, due to the increasing global demand for energy, the effective use of renewable energy has become an urgent problem to be solved. Solar energy accounts for more than 99% of the total energy of the earth. It has the characteristics of inexhaustible supply and no pollution. The energy supply in the world can only be maintained in a weak balance between supply and demand. In addition to the problems of these energy reserves, the environmental pollution caused by the use of these energy sources also threatens the survival of human beings. CO 2 and other greenhouse gases will warm the global climate, SO 2 Such dust will produce acid rain, which will affect people's health. Resources are gradually ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/00
CPCH10K71/10H10K30/00Y02E10/549
Inventor 钟建干逢雨王丽娟程红雪
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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