Thin film polycrystalline silicon solar cells studied by transient terahertz probe spectroscopy

0471499 - FZÚ 2017 RIV NL eng C - Conference Paper (international conference)
Pikna, Peter - Skoromets, Volodymyr - Becker, C. - Fejfar, Antonín - Kužel, Petr
Thin film polycrystalline silicon solar cells studied by transient terahertz probe spectroscopy.
Energy Procedia.Proceedings of the 2016 E-MRS Spring Meeting Symposium T - Advanced materials and characterization techniques for solar cells III. Amsterdam: Elsevier Ltd., 2016 - (Yerci, S.; Crupi, I.; Gordon, I.; Fejfar, A.; Catchpole, K.), s. 19-26. 102. ISSN 1876-6102.
[E-MRS Spring Meeting 2016 Symposium T - Advanced materials and characterization techniques for solar cells III Cover image Op. Lille (FR), 02.05.2016-06.05.2016]
R&D Projects: GA MŠMT LM2015087
Grant - others:AV ČR(CZ) DAAD-16-27
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : plasma hydrogenation * passivation * silicon * nanostructured material * terahertz spectroscopy * Suns-VOC
Subject RIV: BM - Solid Matter Physics ; Magnetism

Thin film polycrystalline silicon (poly-Si) solar cells were annealed in hydrogen plasma or in water vapour to suppress electrical activity of defects and impurities. The passivation procedure was optimized by higher hydrogen pressure of 300 Pa and keeping bias voltage Vbias constant during the whole passivation process. The plasma hydrogenation process was run as a closed system (without hydrogen flow) and the achieved passivation results (up to 497 mV) were close to the limit for poly-Si (500 mV). Passivated samples were analyzed by transient terahertz probe spectroscopy and Suns-VOC method to measure a solar cell's charge carrier lifetime and its open-circuit voltage VOC. A correlation of these measured parameters was observed. The transient terahertz probe spectroscopy appears to be a useful tool for a contactless investigation of materials where ultrafast processes of ns-long lifetimes play a crucial role, e.g. nanostructured objects and materials.
Permanent Link: http://hdl.handle.net/11104/0268888