Fig. 4: Humidity dependence of of NI elastic modulus on Pb-X bond length and H-bonding.
From: Nanomechanical signatures of degradation-free influence of water on halide perovskite mechanics
Pb-X bond length (black) and % change in NI elastic modulus between dry and humid states (red) (a) plotted for the series of X anions and (b) for the series with different A cations. Error bars are computed from the relative error of the quotient, using standard deviation of individual values. (c) scheme showing potential for H-bonding for the different cations, in terms of H atoms (white spheres), available to participate in the bonding; dark grey sphere: Cs; blue sphere: N; light grey sphere: C.
