Browsing CSEM Archive by Author "Yang, T. C. J."

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Complex Refractive Indices of Cesium-Formamidinium-Based Mixed-Halide Perovskites with Optical Band Gaps from 1.5 to 1.8 eV

Werner, J.; Nogay, G.; Sahli, F.; Yang, T. C. J.; Brauninger, M.; Christmann, G.; et al. (2018)

Cesium-formamidinium-based mixed-halide perovskite materials with optical band gaps ranging from 1.5 to 1.8 eV are investigated by variable-angle spectroscopic ellipsometry. The determined complex refractive indices are ...
High-Bandgap Perovskite Materials for Multijunction Solar Cells

Yang, T. C. J.; Fiala, P.; Jeangros, Q.; Ballif, C. (2018)

High-bandgap (>1.7 eV) mixed halide perovskites for multijunction solar cells are usually affected by photoinduced phase segregation, which triggers subbandgap defects that are detrimental to the open-circuit voltage. While ...
Hybrid sequential deposition process for fully textured perovskite/silicon tandem solar cells

Sahli, F.; Werner, J.; Kamino, B. A.; Brauninger, M.; Yang, T. C. J.; Fiala, P.; et al. (2018)

Tandem solar cells that feature a high-bandgap perovskite cell on top of a lower bandgap silicon cell have the potential to reach efficiencies > 30%. Here, we present a versatile hybrid deposition method that yields conformal ...