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Development of semi-transparent cis modules for façade applications ('CIS FAÇADE MODULE')

Deliverables

The achievements of the consortium within this project are: - Development of stacks of decorative layers, sodium diffusion barrier and molybdenum back electrode on float glass deposited on large area glass industry coaters (3.2m x 6m) without affecting circuit efficiency nor long term stability, but making use of the cost advantage of industry proven high throughput sputtering processes (see Figure 1). These substrates are now produced by Saint Gobain for Shell Solar to be used as the standard substrates in the Munich pilot line. - Development of a broadband anti-reflection coating deposited on the front cover glass optimised for the CIS absorber material, including a computer model to predict the gain in short circuit current. The model was experimentally verified. - Development of a process to achieve semi-transparency on CIS without loss in active area efficiency as shown in Figure 2. The process can easily be introduced into a high volume production line, either completely integrated or as an add-on process � as required. - Development of a laser blast edge deletion process and implementation into the Shell Solar CIS pilot line. - Development of a process to isolate shunted areas from the laser edge deletion process and implementation into the Shell Solar CIS pilot line. - Development of a low cost, superior adhesion and long-term stable ultra-sonic welding process for bus bar contacting and implementation into the Shell Solar CIS pilot line. - Achievement of an independently certified 13.1% active area circuit efficiency on a 60x90cm² substrate. This equates to a module power output of 64.8Wp. - Gain of knowledge on CIS module characterisation, performance ratio, transient effects and long-term stability, which will be used to develop test procedures and standards for CIS thin film modules. A first proposal towards a new testing standard was made within the final project report, i.e. the introduction of steady state IV-measurements including light soaking in order to avoid observed differences between indoor and outdoor measurements.

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