We have compared different Ag-based back reflectors (BRs) applied to superstrate-type microcrystalline Si devices grown on Asahi U glass. In particular, substitution of the conventional ZnO:Al layer by MgF2, with lower refractive index and no free-carrier absorption, has been investigated. As electrical issues can mask the optical performance of the BR when evaluated by EQE measurements, a purely optical method that compares the intensity of Raman spectra generated with long wavelength excitation light has been applied. Based on this investigation, MgF2/Ag is potentially superior to ZnO:Al/Ag, even when MgF2 is used in the form of ultrathin layer (few nm, likely island-like). Nevertheless, the novel dual-function n-SiOx/Ag BR outperforms all the other BRs.
|Publication status||Published - 2015|
|Event||E-MRS Spring Meeting 2015 Symposium C - Advanced inorganic materials and structures for photovoltaics, 2015 - Lille, France|
Duration: 1 Jan 2015 → …
|Conference||E-MRS Spring Meeting 2015 Symposium C - Advanced inorganic materials and structures for photovoltaics, 2015|
|Period||1/1/15 → …|
All Science Journal Classification (ASJC) codes
Mercaldo, L. V., Usatii, I., Bobeico, E., Russo, F., Lancellotti, L., & Veneri, P. D. (2015). Optical Performance of Ag-based Back Reflectors with different Spacers in Thin Film Si Solar Cells. Paper presented at E-MRS Spring Meeting 2015 Symposium C - Advanced inorganic materials and structures for photovoltaics, 2015, Lille, France. https://doi.org/10.1016/j.egypro.2015.12.317