Comment on "Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells".
editorial · Level V
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- Also identified by DOI 10.1126/science.abd8014.
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Abstract
Ni <i>et al</i> (Research Articles, 20 March 2020, p. 1352) report bulk trap densities of 10<sup>11</sup> cm<sup>-3</sup> and an increase in interfacial trap densities by one to four orders of magnitude from drive-level capacitance profiling of lead halide perovskites. From electrostatic arguments, we show that the results are not trap densities but are a consequence of the geometrical capacitance and charge injection into the perovskite layer.