73 citations · 75 across the 6 of their papers we have counts for
7 papers
Efficient broadband terahertz generation by above band-gap excitation of the pyroelectric ZnSnN2
T. S. Seifert, H. Hempel, O. Gückstock +10
Terahertz (THz) radiation is a powerful probe of low-energy excitations in all phases of matter. However, it remains a challenge to find materials that efficiently generate THz rad…
The Potential of Geminate Pairs in Lead Halide Perovskite revealed via Time-resolved Photoluminescence
Hannes Hempel, Martin Stolterfoht, Orestis Karalis +1
Photoluminescence (PL) under continuous illumination is commonly employed to assess voltage losses in solar energy conversion materials. However, the early temporal evolution of th…
Revealing the doping density in perovskite solar cells and its impact on device performance
Francisco Peña-Camargo, Jarla Thiesbrummel, Hannes Hempel +8
Traditional inorganic semiconductors can be electronically doped with high precision. Conversely, there is still conjecture regarding the assessment of the electronic doping densit…
Boron phosphide films by reactive sputtering: Searching for a p-type transparent conductor
Andrea Crovetto, Jesse M. Adamczyk, Rekha R. Schnepf +7
With an indirect band gap in the visible and a direct band gap at a much higher energy, boron phosphide (BP) holds promise as an unconventional p-type transparent conductor. Previo…
Water adsorption enhances electrical conductivity in transparent p-type CuI
Andrea Crovetto, Hannes Hempel, Marin Rusu +4
CuI has been recently rediscovered as a p-type transparent conductor with a high figure of merit. Even though many metal iodides are hygroscopic, the effect of moisture on the elec…
Mechanochemical Synthesis of the Lead-Free Double Perovskite Cs2[AgIn]Br6 and its Optical Properties
Joachim Breternitz, Sergiu Levcenko, Hannes Hempel +4
Hitting hard on the binary halides yields in the formation of Cs2[AgIn]Br6. The lead-free double perovskite marks, although not usable itself, a further step forward in finding sus…