• Ravishankar, S.; Unold, T.; Kirchartz, T.: Comment on "Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells". Science 371 (2021), p. eabd8014/1-3

10.1126/science.abd8014
Open Access Version (externer Anbieter)

Abstract:
Ni et al. (Reports, 20 March 2020, p. 1352) report bulk trap densities of 1011 cm-3 and one to four orders change in interfacial trap densities from drive-level capacitance profiling of lead halide perovskites. From electrostatic arguments, we show that the results are not trap densities but a consequence of the geometrical capacitance and charge injection into the perovskite layer.