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Photovotaic cell

A photovoltaic cell and electrode technology, applied in the field of photovoltaic cells, can solve problems such as insufficient conditions

Inactive Publication Date: 2006-10-04
科纳卡奥地利研发公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to achieve good efficiency, good charge separation is required, but this is not a sufficient condition, since it must also be ensured that the separated charges reach the corresponding electrodes of the photovoltaic cell

Method used

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Examples

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Embodiment Construction

[0011] Such as figure 1 As shown, the photovoltaic cell comprises a transparent glass carrier 1 on which an electrode layer 2 made of indium / tin oxide (ITO) is coated. The electrode layer 2 generally has a relatively rough surface structure, so it is covered by a smooth layer 3 of a polymer, usually PEDOT, which is made electrically conductive by doping. Contrary to common photovoltaic cells of this type, according to the invention the photosensitive layer 4 is not coated directly on this smooth layer, but on an intermediate layer 5 made of a conjugated polymer, preferably of Poly(3-alkylthiophene), the conjugated polymer is doped with oxidative impurities with nitrosonium tetrafluoroborate after coating on the smooth layer 3 in order to obtain a corresponding excess of holes.

[0012] The photosensitive layer 4 coated in solution on the intermediate layer 5 is made of a conjugated polymer as an electron donor, preferably a polythiophene derivative, and a fuller as an electro...

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Abstract

A photovoltaic cell is described, having a photoactive layer (4) made of two molecular components, namely an electron donor and an electron acceptor, particularly a conjugated polymer component and a fullerene component, and having two metallic electrodes (2, 6) provided on both sides of the photoactive layer (4). In order to provide advantageous construction conditions, it is suggested that an intermediate layer (5) made of a conjugated polymer, which has doping corresponding to the electrode potential and, in regard to the electron energy, has a band gap between the valence band and the conduction band of at least 1.8 eV, be provided between the photoactive layer (4) and at least one electrode (2,6).

Description

technical field [0001] The invention relates to a photovoltaic cell having a photosensitive layer made of two components, an electron donor and an electron acceptor, in particular a conjugated polymer component and a fullerer component, and the photovoltaic cell There are two metal electrodes on either side of the photosensitive layer. Background technique [0002] Plastics with a large number of π-electron systems are called conjugated plastics, in which single and double bonds alternate sequentially with each other. These conjugated plastics have energy bands comparable to the electronic energy of semiconductors, so they can also be converted from a non-conducting state to a conducting state by doping. Examples of such conjugated plastics are polyphenylene, polystyrenevinylene (PPV), polythiophene or polyaniline. However, the energy conversion efficiency of polymer photovoltaic cells made of conjugated polymers is usually in the range of 10 -3 and 10 -2 %between. To i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L31/00H01L31/0256H01L31/04H01M14/00H10K99/00
CPCH01L51/0037B82Y10/00B82Y30/00H01L51/0047H01L51/0036Y02E10/549H01L51/4253H01L51/002H01L51/4246H10K71/30H10K85/113H10K85/1135H10K85/215H10K30/50H10K30/30H10K30/211
Inventor 西恩·沙欣克里斯托夫·布雷贝克托马斯·弗罗姆赫兹弗朗兹·帕丁格塞达·萨里西夫茨埃哈德·格洛兹尔
Owner 科纳卡奥地利研发公司