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Transparent, conducting and textured layer and method of fabrication

A transparent conductive layer, conductive layer technology, applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of increasing the reflection of light and reducing the current generated by light

Inactive Publication Date: 2009-04-15
UNIV DE NEUCHATEL NEUCHATEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the fact that the depressions are flat has the disadvantage of increasing the reflection of light and, therefore, reducing the light injected into the photovoltaic device, thus reducing the photogenerated current accordingly.

Method used

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  • Transparent, conducting and textured layer and method of fabrication
  • Transparent, conducting and textured layer and method of fabrication
  • Transparent, conducting and textured layer and method of fabrication

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Embodiment Construction

[0024] Before giving a description of the TCO layer according to the invention and its method of manufacture, we recall that optoelectronic devices, whether they include solar cells or photodetectors, are characterized by conversion properties η and light-harvesting capabilities, as long as the light generates current The collection of is good, the former term depends on the latter term.

[0025] The conversion performance η of a device of this type is given by the ratio between the electrical power supplied by the device and the received candle power, the supplied power being equal to the product of:

[0026] Short circuit current (I sc )×open circuit voltage (V oc )×fill factor (FF).

[0027] A good characterization of the light-harvesting ability is the photocurrent density provided by the cell at reverse voltage (I inv ) given, this reverse voltage makes it possible to extract all the photogenerated carrier current and thus be independent of V oc And the value of FF to...

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Abstract

The textured transparent conductive layer according to the invention is deposited on a substrate intended for a photoelectric device and exhibiting a surface morphology formed from a sequence of humps and hollows. It is characterized in that its hollows have a rounded base with a radius of more than 25 nm; the said hollows are virtually smooth, which is to say that, where they exhibit microroughnesses, these microroughnesses have a height on average of less than 5 nm; and its flanks form an angle with the plane of the substrate whose median of the absolute value is between 30 DEG and 75 DEG .

Description

technical field [0001] The invention relates to the field of optoelectronic devices. In particular it relates to transparent conductive layers deposited on substrates for thin-film optoelectronic devices. Such layers are often technically referred to as TCO (transparent conductive oxide) layers or electrodes. The invention also relates to methods of manufacturing such electrodes. [0002] The application of the present invention is particularly focused on the fabrication of photovoltaic cells for the generation of electrical energy, but it can also be applied more broadly to any structure that converts optical radiation into an electrical signal, such as a photodetector. Background technique [0003] In the prior art, thin-layer optoelectronic devices with a typical thickness of less than 10 μm consist of transparent or opaque, soft or hard substrates and deposited on such substrates composed of inorganic semiconducting materials or rarely organic materials. The photoelec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L27/142H01L31/18H01L31/0224
CPCH01L31/022466H01L31/0236Y02E10/50H01L31/1884H01L31/022483H01L27/142H01L31/18H01L31/0224
Inventor J·贝拉特C·巴立夫D·多米勒
Owner UNIV DE NEUCHATEL NEUCHATEL
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