Thin-Film Today’s Joshua Bull presents an in-depth look at the recent spate of investment in European thin-film companies.
The EU recently reinforced its commitment to renewable energy with an EU-wide directive that commits the EU to 20% renewable energy targets by 2020.
Specifically from the solar industry perspective, a lot would depend upon Germany’s continued support.
Going by the recent past, there have quite a few developments, which show progress in the thin-film module segment, especially in Germany.
Last month, the European Commission backed nearly €100 million euros ($129 million) in aid to two solar power projects in Germany.
The Commission authorised, under EC Treaty state aid rules, €56 million of regional investment aid, which the German authorities awarded to Sunfilm for the production of thin-film solar modules in Saxony. (Good Energies and Norsun have established Sunfilm to manufacture 5.7m² tandem thin-film photovoltaic modules on glass substrates on a production line supplied by Applied Materials).
The balance of around €40 million of aid was approved for ersol Thin Film for the production of thin-film solar modules in Erfurt.
Post this aid, ersol, a company of the Bosch Group, projected an output of around 30 MWp in the thin-film segment, despite the current difficulties on the market. ersol, which operates a production line for thin-film modules based on amorphous silicon (Nova T series), has also shared plans for amorphous-microcrystalline tandem cell technology for silicon thin-film technology.
Among others, Sontor, a wholly-owned subsidiary of Q-Cells, produced and sold 3.6 MWp of modules last year. Sontor’s plans for 2009 are to further improve the utilisation of the 24-MWp production capacity. Additionally, Sontor plans to increase the R&D activities in Bitterfeld-Wolfen. Also, the ramp-up of the first production facility for micromorph silicon thin-film modules in Solar Valley Thalheim is on schedule.
The company produces micromorph silicon thin-film photovoltaic modules, which consist of two extremely thin layers of silicon (one amorphous and one crystalline) on glass. Last month, Torsten Brammer, CTO, Sontor, shared that the modules are achieving stable efficiency levels of up to 8% in relation to the 1.8 sq metre total area of the module. At cell level, stable values of up to 9.3% efficiency on the active surface have already been achieved in the current ramp-up phase.
Commenting on the most promising opportunities for various thin-film technologies in Europe, Paula Mints, Principal Analyst PV Services Program, Navigant Consulting, said all thin-film technologies have a role to play in the future direction of the solar industry.
“Though, the next year at least will be difficult, there is stronger global acceptance of thin films. That is, for the most part, these technologies are no longer viewed as a risky choice. In sum, during the downturn, thin films can continue to progress towards higher efficiency and lower manufacturing cost – though, all lower cost does is give more cushion in the margin,” said Mints, who is scheduled to speak during Thin Film Solar Summit Europe, scheduled to take place on May 19-20 in Berlin.
According to Mints, as demand is softer in the near term, technology development from pilot scale to commercialisation will be less pressured.
“For the past couple of years there were high and unrealistic expectations placed on the time to commercialisation — these need to be viewed more realistically. It is more important that a technology perform well, than it is that it gets out of the gate quickly,” she said
“During slower times, innovations in BOS (balance of systems) to make less efficient thin films less expensive to install can (and should be) pursued. In the end, thin films are appropriate for rooftop and ground applications and highly appropriate for BIPV (building integrated PV). Though BIPV is barely a niche market at the moment, the development of flexible products and new form factors can move the industry more towards green building. All applications and all technologies are necessary to help Europe meet its goal,” Mints added.
Progressing from pilot scale to commercialisation
With reference to progress made by Sontor, Mints feels that all micromorph manufacturers are about in the same place. Companies such as Uni-Solar (U.S.), Kaneka (Japan), and others have been pursing development of this technology for several years.
“It takes a long time to progress from pilot scale to commercialisation, and I put most of these manufacturers at either pilot scale, or emerging into an initial stage of commercial production. As the PV industry is in for at least one year of slower demand, possibly two, there is time for necessary efficiency improvements for micromorph,” she said.
“I don’t see this as a situation with one clear winner, more as a situation where different paths will emerge as more successful than others. All paths need to lead towards higher efficiency, and I would say that this should be >8% to start and much more competitive at 10%. However, this is not trivial. The industry needs all of the micromorph technologies (no matter the region) to emerge at a successful efficiency and manufacturing cost. We need to learn from each other. In sum, it is early days yet, let’s give these emerging technology paths time to emerge,” she concluded.
Author: S. McMahon