Bulk heterojunction organic thin-film solar cell and preparation method thereof

A solar cell and bulk heterojunction technology, applied in the field of solar energy, can solve problems such as destroying the interface structure, weakening the stability of organic thin film solar cells, and erosion, and achieves the effects of simple process, improved ability to resist photochemical reactions, and low price

Inactive Publication Date: 2015-12-09
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In addition, the interface between the components of organic light thin film solar cells is easily eroded by water and oxygen, and photochemical reactions are also prone to occur, destroying the original interface structure and forming surface states, thus weakening the stability of organic thin film solar cells

Method used

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  • Bulk heterojunction organic thin-film solar cell and preparation method thereof
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  • Bulk heterojunction organic thin-film solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] With acetone as a solvent, a solution of hindered amine light stabilizer TH-944 with a concentration of 0.5% (w / w) was prepared for use. P3HT was mixed with PC61BM at a concentration of 17 mg / ml at a ratio of 1:1 (W:W) and dissolved in dichlorobenzene. The mixed solution was heated and stirred at 60°C for 12 hours, and then used. Sonicate the ITO transparent substrate with washing solution, deionized water, acetone, and ethanol twice for 15 minutes, and blow dry with nitrogen. The prepared hindered amine light stabilizer TH-944 solution was spin-coated on the ITO substrate by the spin-coating method at a speed of 3500 rpm for 60 s. Dry naturally in the air for 2 hours to form a cathode modification layer. The heterojunction active layer P3HT:PC61BM was spin-coated on the cathode modification layer at a rotation speed of 800 rpm for 60 s. After 1 hour of natural drying in a nitrogen environment, annealing at 120°C for 20 minutes. Sequentially use high vacuum thermal e...

Embodiment 2

[0050] Using acetone as a solvent, a 2% (w / w) hindered amine light stabilizer TH-944 solution was prepared for use. P3HT was mixed with PC61BM at a concentration of 17 mg / ml at a ratio of 1:1 (W:W) and dissolved in dichlorobenzene. The mixed solution was heated and stirred at 60°C for 12 hours, and then used. Sonicate the ITO transparent substrate with washing solution, deionized water, acetone, and ethanol twice for 15 minutes, and blow dry with nitrogen. Soak the ITO transparent substrate in the prepared hindered amine light stabilizer TH-944 solution for 2 hours to form a self-assembly process. The soaked ITO transparent substrate was taken out, rinsed with acetone and dried naturally to form a cathode modification layer. The heterojunction active layer P3HT:PC61BM was spin-coated on the cathode modification layer at a rotation speed of 800 rpm for 60 s. After 1 hour of natural drying in a nitrogen environment, annealing at 120°C for 20 minutes. Sequentially use high vac...

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Abstract

The invention discloses a bulk heterojunction organic thin-film solar cell and a preparation method thereof. The cell has an inverted structure and is composed of a transparent substrate, a transparent cathode, a cathode modification layer, an active layer, a hole transmission layer and a metal anode which are arranged from the bottom to the top in turn. The modification effect of hindered amine light stabilizer material to the transparent electrode is utilized so that the work function of the transparent cathode is reduced, energy level of the transparent cathode is coordinated, cathode interface barrier is reduced and electron transmission and collection capability of the cathode is enhanced. Besides, the suppression effect of the hindered amine light stabilizer to photochemical reaction is utilized so that stability of the cathode interface is also enhanced by the modification layer and aging resistance of the cell can be enhanced. The modification layer is prepared by a spin coating and self-assembling method so that the preparation technology is simple. Besides, the light stabilizer is material of mass industrial production so that reduction of cost of the solar cell is facilitated.

Description

technical field [0001] The invention relates to an organic thin film solar cell, in particular to an inverted structure heterojunction organic thin film solar cell using a hindered amine light stabilizer as a cathode modification layer, and belongs to the technical field of solar energy. Background technique [0002] The energy problem is one of the most important problems facing the world today. With the continuous consumption of fossil energy and the increasingly serious environmental problems caused by the long-term use of fossil energy, it is imminent to find a new energy source with large reserves and no pollution. Numerous new energy sources, including nuclear energy, solar energy, biomass energy, hydroelectric energy, wind energy, geothermal energy and tidal energy, etc. Among them, solar energy is favored by people because of its inexhaustible huge reserves, clean and non-polluting environmental protection characteristics, simple production process and low production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/44H01L51/42H01L51/00
CPCH10K71/00H10K30/81H10K30/30Y02E10/549
Inventor 张宏梅戴运杰
Owner NANJING UNIV OF POSTS & TELECOMM
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