PV PROCESSEQUIPMENT
Beneq Oy www.beneq.com
Beneq launches first ever industrial scale ALD unit
During Q4 of 2009, Beneq launched a complete product concept for high throughput rear side passivation (RSP) of crystalline silicone (c-Si) based solar cells. The concept includes both process know-how and the coating equipment required, i.e., the TFS 4X300 Atomic Layer Deposition (ALD) System. The TFS 4X300 is a robust production tool intended for continuous operation and high reliability. In order to reach the growing demand for clean energy at reasonable cost, solar cells have to improve their performance-per-cost ratio. Achieving higher efficiency with a thinner wafer has a positive impact on both performance and cost. However, this improvement has one basic requirement: high-quality passivation of the rear surface of the silicon cell.
Good RSP can improve the efficiency of multi- and mono- crystalline silicon solar cells by 1...2 percentage points, which
corresponds to an approximately 10% enhancement in the performance of the cell. As a material, Al2
O3 radically improves
the quality of the surface passivation of p-type base and emitter, as well as n-type base. As a coating means, ALD offers a refined and low-temperature deposition method for this. Several research groups have demonstrated charge carrier lifetimes longer than 1 ms. Beneq now offers, in addition to application specific contract deposition services, an industrial-scale ALD production unit for RSP: the TFS 4X300. Besides enabling conformal and pinhole-free nanoscale coatings with suitable chemical precursors, the TFS 4X300 hosts a fully automated cassette loading module for handling 156 x 156 mm wafers. The throughput of the TFS 4X300 is 3000 wafers per hour with 20 nm of Al2
O3 at a processing
temperature of 200°C (390°F). The TFS 4X300 supports the SECS/GEM protocol for process data collection. Cost of ownership calculations show figures less than 0.05 €/ wafer.
Christian Senning Verpackungsmaschinen GmbH & Co. KG www.senning.de/intro.html
Transport packaging and quality inspection
Christian Senning Verpackungsmaschinen GmbH & Co. KG has specialized in handling equipment for Ingot, Si Bricks, Wafers, Cells and Modules. Our target is to supply machines that are compact and easy to use. Senning has developed a system to minimize the breakage rate substantially.
We offer complete solutions for wafers and cells, i.e. from testing, sorting, packaging and cartonising to palletizing - providing a system from one source. In addition, there is a solution to unwrap again, to separate and to integrate the products directly into the production process at customer’s site.
The system is of modular design. All machines are also individually available. This enables us to compose in each case the optimal solution for our customer.
Breakage-Proof wrapping of wafers and cells
The transport safe packaging of wafers and cells is of crucial importance. Senning Solar packaging systems for wafers and cells prevent slipping or rubbing against each other. All materials used for the packaging are recyclable and therefore non polluting. Senning applied for a patent regarding this method of packaging
SMP Sintermetalle Prometheus GmbH & Co KG www.smp.de
SMP Sintermetalle Prometheus (SMP) has developed chokes for power inverters in photovoltaic plants. These inductive components feature low losses, very low stray fields and a highly compact design, and offer energy efficiency advantages for power inverters that are based on these chokes. SMP uses core materials made of powder composites that are purpose- designed for every individual application. Developed by SMP especially for solar power applications, the materials used have low magnetostriction and exceptionally low eddy current and hysteresis losses. This means that the inverters in which they are used are highly efficient, so that a larger proportion of the generated power can be fed back into the grid, resulting in a faster return of investments.
This is because the cost-effectiveness of a photovoltaic plant is directly related to the inverter's efficiency. Besides low losses,
SMP chokes
other requirements for components in power converters are low-intensity stray fields. SMP chokes achieve this through an encapsulated design. This offers the advantage that other components can be placed in close vicinity to the chokes without the risk of any magnetic interaction. Compact choke design is another important aspect. In comparison to conventional designs, SMP chokes occupy 25 percent less volume. Moreover, SMP chokes operate quietly, which allows their use in residential areas. "Solar technology applications rely on components with highest energy efficiency," explains Stefan Schauer, technical sales manager at SMP. "Manufacturers attach great importance to component efficiency, and its value must be as high as possible. Using SMP chokes, today's power converters can reach efficiencies of 98%. When using low-loss chokes, more power will be left to be fed into the grid."
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www.solar-pv-management.com Issue II 2010
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