Electroreflectance spectroscopy on CdS and Zn(O,S) buffer layers in Cu(In,Ga)Se2 solar cells: Suppression of interference effects
| Autor: | Jasmin Seeger, Heinz Kalt, Wolfram Witte, Michael Hetterich, Oliver Kiowski, Dimitrios Hariskos, Ulrich Piesch |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Analytical chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Buffer (optical fiber) Spectral line law.invention Erbium chemistry Interference (communication) law Etching (microfabrication) 0103 physical sciences Solar cell 0210 nano-technology Spectroscopy Layer (electronics) |
| Zdroj: | 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). |
| DOI: | 10.1109/pvsc.2018.8547688 |
| Popis: | Electroreflectance (ER) spectroscopy is utilized to study Cu(In,Ga)Se 2 solar cells with solution-grown CdS and Zn(O,S) buffer layers. Due to the weak ER signals of the thin buffer layers, interference effects can have a strong influence on the ER spectra. To suppress these interference effects, the thickness of the ZnO window layer, and hence the interference conditions, are changed by a step-by-step etching process while keeping the solar cell operational. This method was successfully applied to solar cells with CdS buffer. First results from transferring this approach to alternative Zn(O,S) buffer layers are also reported. |
| Databáze: | OpenAIRE |
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