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High Efficient Crystalline Silicon Solar Cells - Competitor and IP Landscape Report - Key players, innovators and industry analysis.pdf

54 Pages Dolcera Corporation December 28, 2011 SKU: DOLC6768977

Direct energy conversion from sunlight to electricity is obtained through solar cells. Advantage of solar cells is that they do not have any mechanical parts which make them easy to use, maintenance free and leading to longer life. Silicon (Si) is widely used semiconductor material for solar cells. Advantage of Si over other semiconductor devices is due to well developed microelectronics industry which has considerable knowledge of working with Si. This makes Si a better candidate for solar cells as compared to other semiconductor material such as gallium arsenide (GaAs) or germanium (Ge).

The present efficiency limit and cost of the solar cell are not in comparison with conventional energy sources. Efficiency of solar cells is about 24.7% in laboratory and 14% commercially. Some practices which are followed to reduce the losses are better material selection, proper manufacturing techniques or changing design procedure of the cell. Low efficiency is due to high percentage of losses. Reflection loss, resistive loss, recombination loss and thermal loss tend to reduce the efficiency of solar cell. The present report discusses in detail the different mechanisms of losses occurring in the solar cells. Also techniques that are implemented to reduce, losses are addressed briefly.

Method of analysis:

Efficiency improvement of crystalline Silicon solar cells IP analyses started with identification of control patents which are highly relevant to the topic. It follows the identification of various keywords related to the concept and also identifying IPC, ECLA, US, F-term and DWPI classes relevant to the context. Logical combinations of the classes and keywords are framed and are searched in Thomson Innovation (TI) database. The search resulted in a total of 4706 INPADOC patent families, out of which 2425 patents have been identified as relevant. These patents are used for further analytics.

Key findings:

From the analytics, it is observed that Sharp Corp, Mitsubishi Corporation and Canon Inc is the major players in high efficiency crystalline silicon solar cells. Also IP activity based on publication year and priority year is observed and the trend shows that since 2005 there is considerable growth in the research. Among the top players Canon KK, Sandia Corp and BP Corp North America Inc have good number of cited patents and among technologies. H01L31/04 (Semiconductor Devices as Photovoltaic Converters) and H01L31/042 (Solar Cell Arrays) have good quality patents. Top cited patents and article list has also been furnished in the report.

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High Efficient Crystalline Silicon Solar Cells - Competitor and IP Landscap...

Dolcera Corporation
December 28, 2011

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