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19 papers
Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr Single Crystal
Michal Baranowski, Krzysztof Galkowski, Alessandro Surrente +13
Exciton fine structure splitting in semiconductors reflects the underlying symmetry of the crystal and quantum confinement. Since the latter factor strongly enhances the exchange i…
The impact of the halide cage on the electronic properties of fully inorganic caesium lead halide perovskites
Z. Yang, A. Surrente, K. Galkowski +8
Perovskite solar cells with record power conversion efficiency are fabricated by alloying both hybrid and fully inorganic compounds. While the basic electronic properties of the hy…
Ultrahigh magnetic field spectroscopy reveals the band structure of the 3D topological insulator BiSe
A. Miyata, Z. Yang, A. Surrente +7
We have investigated the band structure at the point of the three-dimensional (3D) topological insulator BiSe using magneto-spectroscopy over a wide range of energies (…
Unraveling the exciton binding energy and the dielectric constant in single crystal methylammonium lead tri-iodide perovskite
Zhuo Yang, Alessandro Surrente, Krzysztof Galkowski +6
We have accurately determined the exciton binding energy and reduced mass of single crystals of methylammonium lead tri-iodide using magneto-reflectivity at very high magnetic fiel…
Determination of the exciton binding energy and effective masses for the methylammonium and formamidinium lead tri-halide perovskite family
Krzysztof Galkowski, Anatolie Mitioglu, Atsuhiko Miyata +8
The family of organic-inorganic halide perovskite materials has generated tremendous interest in the field of photovoltaics due to their high power conversion efficiencies. There h…
Independence of Optical Absorption on Auger Ionization in Single-Walled Carbon Nanotubes Revealed by Ultrafast e-h Photodoping
Mitchell D. Anderson, Meghan N. Beattie, Jack A. Alexander-Webber +2
Auger-ionized carriers in a one-dimensional semiconductor are predicted to result in a strong band-gap renormalization. Isolated single-walled carbon nanotubes (SWCNT) under high-i…