@article{CrovettoHempelRusuetal.2020,
  author    = {Crovetto, Andrea and Hempel, Hannes and Rusu, Marin and Choubrac, Leo and Kojda, Sandrino Danny and Habicht, Klaus and Unold, Thomas},
  title     = {Water adsorption enhances electrical conductivity in transparent p-type CuI},
  series = {ACS applied materials \& interfaces},
  volume    = {12},
  journal   = {ACS applied materials \& interfaces},
  number    = {43},
  publisher = {American Chemical Society},
  address   = {Washington, DC},
  issn      = {1944-8244},
  doi       = {10.1021/acsami.0c11040},
  pages     = {48741 -- 48747},
  year      = {2020},
  abstract  = {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 electrical properties of CuI has not been clarified. In this work, we observe a 2-fold increase in the conductivity of CuI after exposure to ambient humidity for 5 h, followed by slight long-term degradation. Simultaneously, the work function of CuI decreases by almost 1 eV, which can explain the large spread in the previously reported work function values. The conductivity increase is partially reversible and is maximized at intermediate humidity levels. On the basis of the large intragrain mobility measured by THz spectroscopy, we suggest that hydration of grain boundaries may be beneficial for the overall hole mobility.},
  language  = {en}
}
@article{KirchartzMarquezStolterfohtetal.2020,
  author    = {Kirchartz, Thomas and M{\´a}rquez, Jos{\´e} A. and Stolterfoht, Martin and Unold, Thomas},
  title     = {Photoluminescence-based characterization of halide perovskites for photovoltaics},
  series = {Advanced Energy Materials},
  volume    = {10},
  journal   = {Advanced Energy Materials},
  number    = {26},
  publisher = {Wiley},
  address   = {Weinheim},
  issn      = {1614-6832},
  doi       = {10.1002/aenm.201904134},
  pages     = {1 -- 21},
  year      = {2020},
  abstract  = {Photoluminescence spectroscopy is a widely applied characterization technique for semiconductor materials in general and halide perovskite solar cell materials in particular. It can give direct information on the recombination kinetics and processes as well as the internal electrochemical potential of free charge carriers in single semiconductor layers, layer stacks with transport layers, and complete solar cells. The correct evaluation and interpretation of photoluminescence requires the consideration of proper excitation conditions, calibration and application of the appropriate approximations to the rather complex theory, which includes radiative recombination, non-radiative recombination, interface recombination, charge transfer, and photon recycling. In this article, an overview is given of the theory and application to specific halide perovskite compositions, illustrating the variables that should be considered when applying photoluminescence analysis in these materials.},
  language  = {en}
}
@misc{KirchartzMarquezStolterfohtetal.2020,
  author    = {Kirchartz, Thomas and M{\´a}rquez, Jos{\´e} A. and Stolterfoht, Martin and Unold, Thomas},
  title     = {Photoluminescence-based characterization of halide perovskites for photovoltaics},
  series = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  journal   = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Mathematisch-Naturwissenschaftliche Reihe},
  number    = {26},
  issn      = {1866-8372},
  doi       = {10.25932/publishup-51970},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus4-519702},
  pages     = {23},
  year      = {2020},
  abstract  = {Photoluminescence spectroscopy is a widely applied characterization technique for semiconductor materials in general and halide perovskite solar cell materials in particular. It can give direct information on the recombination kinetics and processes as well as the internal electrochemical potential of free charge carriers in single semiconductor layers, layer stacks with transport layers, and complete solar cells. The correct evaluation and interpretation of photoluminescence requires the consideration of proper excitation conditions, calibration and application of the appropriate approximations to the rather complex theory, which includes radiative recombination, non-radiative recombination, interface recombination, charge transfer, and photon recycling. In this article, an overview is given of the theory and application to specific halide perovskite compositions, illustrating the variables that should be considered when applying photoluminescence analysis in these materials.},
  language  = {en}
}