Research Groups Solar; PIDSINX:H
|German title:||Forschergruppen Solar; PIDSINX:H|
|Duration:||1st January 2013 - 31st December 2014|
|Description:||The work in the research group focused on the silicon nitride layer, which is important for silicon solar cells, and the silicon nitride/silicon (SiNx:H/Si) interface. SiNx is widely used as an anti-reflective layer and is of outstanding importance for the functionality and performance characteristics of silicon solar cells. In particular, the SiNx layer plays an important role for the potential-induced degradation (PID) effect, which strongly limits the performance of silicon solar cells.
In the project, preparations of the critical SiNx:H/Si interface were carried out, and its properties were specifically varied via the deposition conditions. After a comprehensive characterization, the identification of the relevant physicochemical processes and important influencing variables for PID is carried out in the process of model building. For this purpose, various advanced methods of layer and interface analysis (e.g. capacitance stress measurements) as well as microstructural analyses were applied. Accompanying numerical simulations are performed.
Together with the "sister project", the research group OptiSOLAR at the TU Ilmenau, relevant questions around the microscopic understanding and thus the avoidance of the PID effect are addressed. After all, to ensure and increase the product reliability of solar modules (lifetime > 25 years), the know-how to avoid PID is an essential key.
The goal is to go beyond the phenomenological approach and develop a physical-chemical understanding of the PID effect. This will enable reliable statements to be made about the behavior of the interfacial system in the solar cell when the choice of materials and processes is changed, and when the solar cell structures are modified, while dispensing with more extensive, lengthy and cost-intensive test series. In addition, specific module tests are carried out on the solar cells produced with varied layer systems in a practical manner.
Roth & Rau AG, Hohenstein-Ernstthal
SolarWorld Innovations GmbH, Freiberg
Masdar PV GmbH, Arnstadt
CEM Concept GmbH, Großheubach
|Funding code:||2012 FGR 0232|
|Contact:||Contact us about this project via our former business unit Silicon Detectors|
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