enables customers to perform the most accurate sorting of busbarless cells at lowest costs.
previously limited to basic single source simulators.
Unisim Compact Solar Simulator
The challenges faced are threefold. The first one is to ensure proper contacting of the fingers to minimise the contact resistance and obtain a reproducible evaluation of the FF.
The bowing difference between 2 cells as well as the discontinuous finger’s height of a single cell is a real challenge. The second was to answer the market need of providing a solution suitable for various types of printing patterns rear side fully metallised perpendicular fingers etc.
The last challenge was to develop an industrial and cost effective unit that could be used to sort cells with highest precision.
The GridTOUCH has overcome all of these challenges through creative engineering design the convex bottom plate and the strength given to the upper wires maximise the number of fingers contacted while limiting the pressure on the cell and thus allowing measurement of really thin cells 120 µm.
In order to minimise the maintenance costs and downtime the system has been designed to maximise the number of contacts that exceed 3 million cycles. The replacement of the frame can be done within a few minutes.
THE ‘UNISIM COMPACT’ solar simulator provides the close-match spectra of our standard dual source ‘Unisim’ solar simulators in a low cost and compact form for bench top applications. The system provides a stand-alone instrument including front panel controls, a complete IV measurement system as well as a pneumatically controlled shutter and enclosure mechanism for easy, tool-less maintenance. This instrument is the first of its kind, allowing a whole group of researchers, who were previously limited to basic instruments, access to a high quality solar simulator to advance their research.
With high efficiency multi junction solar cells requiring a close match spectrum in order to achieve the most accurate calibration and results some research laboratories have been forced to use crude single source instruments for small scale research applications where only a relatively small beam size is required.
Many research groups are also limited by physical floor space or budget which means our larger solar simulators such as our standard Unisim range are not an option. The Unisim Compact makes the world leading close-match spectrum which TS-Space Systems is known for available in a bench top form and at a low cost whilst retaining all the salient features our customers love about our standard Unisim range.
This opens up a world class instrument to a range of researchers who were
52
www.solar-international.net I Issue IV 2014
The Solar Industry Awards will be announced 9 September 2014
and the Awards ceremony will be held on the 23 September 2014
at Sofitel Legend The Grand in Amsterdam
The Unisim Compact comes as a stand alone instrument with a full IV measurement system and built-in source meter. The dual source optics features our pioneering highly stable metal halide arc lamp and standard quartz halogen lamps which can be controlled and shuttered via the front panel. An intensity indicator is also built into the system in order to monitor lamp light levels.
The easy maintenance of the lamps and optics is aided by a pneumatically controlled enclosure lift mechanism providing full 360 degree access to the simulator optics without any tools or physical effort.
The system is also designed to take additional drop-in filter units which quickly and easily convert the close-match AM0 spectrum to AM1.5. We are the first and only company to produce not only a dual source solar simulator of this type but also in a form factor suited to smaller laboratory applications.
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