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Use of indanthrene compounds in organic photovoltaics

A technology of indanthrene and compounds, applied in the field of organic solar cells, can solve problems such as limitations

Inactive Publication Date: 2012-12-26
BASF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The total current is limited by the component cell with the lowest short circuit current Isc

Method used

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Experimental program
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Effect test

preparation example Construction

[0221] The preparation of mixed planar-hybrid heterojunctions is described in Adv. Mater. 17, 66-70 (2005). In this structure, a mixed heterojunction layer formed by simultaneous evaporation of acceptor and donor materials exists between homogeneous donor and acceptor materials.

[0222] In a particular embodiment of the invention, the donor-acceptor heterojunction is in the form of a gradient bulk heterojunction. In a mixed layer composed of donor and acceptor materials, the donor-acceptor ratio changes gradually. The gradient form can be stepped ( Image 6 (a)) or linear. exist Image 6 In (a), layer 01 is composed of 100% donor material, layer 02 has a donor / acceptor ratio > 1, layer 03 has a donor / acceptor ratio = 1, and layer 04 has a donor / acceptor ratio of Ratio Image 6 In (b), layer 01 consists of 100% donor material, layer 02 has a reduced donor / acceptor ratio, i.e. the proportion of donor material decreases linearly in the direction of layer 03, and layer 03 con...

Embodiment 1

[0264] Example 1: Deuterated Indanthrene Blue

[0265]

[0266] 3.0g of indanthrene blue in 30mol D at room temperature 2 SO 4 Stirring for 20 hours. The solution was then added to 100ml D 2 O to precipitate the product, filter and wash with D 2 O wash to neutral. This gave 2.98 g of product. The product was redissolved in 30ml D 2 SO 4 and stirred at room temperature for 20 hours. Then add 50ml D dropwise 2 O, the resulting precipitate was filtered off and the residue was washed with D 2 O wash and dry. This gave 2.9 g of deuterated product.

[0267] To fabricate solar cells, 2.0 g of this material was subjected to gradient sublimation three times at 375°C / 325°C / 250°C. This gave 829 mg of blue product.

Embodiment 2

[0268] Embodiment 2: N, N'-diphenylindanthrene

[0269]

[0270] 20.0g (45.2mmol) indanthrene blue, 28.5g (182mmol) bromobenzene, 19.25g (182mmol) sodium carbonate, 0.2g (3.18mmol) copper iodide (I) and 0.34g (1.8mmol) copper acetate The mixture of (I) was heated in 50 ml of nitrobenzene for 18 hours. The reaction mixture was cooled and filtered with suction through a filter filled with silica gel. The product was eluted with a mixture of acetone and dichloromethane. The product thus obtained is purified again by chromatography using cyclohexane / ethyl acetate (2:1). This afforded 1.8 g (7%) of a blue solid.

[0271] 630 mg of this product was subjected to gradient sublimation at 265°C / 200°C / 150°C. This yielded 160 mg of blue material, which was used for the production of solar cells.

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Abstract

Disclosed is an organic solar cell which comprises at least one photoactive region which comprises at least one indanthrene compound which is in contact with at least one fullerene compound, and the use of indanthrene compounds in organic photovoltaics, especially in the form of a component cell of a tandem cell.

Description

[0001] Invention subject [0002] The present invention relates to an organic solar cell comprising at least one photosensitive region comprising at least one indanthrene compound in contact with at least one fullerene compound, and to indanthrene compounds in organic photovoltaics use in the device. technical background [0003] Due to the reduction of fossil raw materials and the formation of CO as a greenhouse gas in the burning of these raw materials 2 , is playing an increasingly important role in generating energy directly from sunlight. "Photovoltaic" is understood to mean the direct conversion of radiant energy, mainly solar energy, into electrical energy. [0004] In contrast to inorganic solar cells, light does not directly generate free carriers in organic solar cells, but first forms excitons, ie electrically neutral excited states in the form of electron-hole pairs. These excitons can only be separated by very high electric fields or at suitable interfaces. In...

Claims

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Application Information

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IPC IPC(8): H01L31/042C07D241/42C09B5/48
CPCC07D241/36C09B5/48H01L51/0072H01L51/4246C07D241/42Y02E10/549H01L51/4273H10K85/6572H10K30/211H10K30/353H10K30/57H10K30/50
Inventor M·克内曼R·赫J·H·黄C·多尔曲建强G·韦伯G·麦特恩P·埃尔克
Owner BASF AG
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