Heatmap from Scientific Research

Absorption energy onset map obtained as a result of fitting a Gaussian peak to the first-order derivative of one minus transmittance as a function of the photon energy of the perovskite thin films. Measurements were carried out on encapsulated samples in the air. Note, the bright spot in the absorption map of the 59% ACN sample. We hypothesized that the increase in apparent bandgap is caused by the onset of the phase transition due to local encapsulation failure.

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