Thermodynamic stability screening of IR-photonic processed multication halide perovskite thin films

Abstract

Two hundred sixty-six films processed with flash infrared annealing were optically and structurally characterized. We determine the optimum conditions for the formation of the mixed-cations halide perovskite active phase.

Photonic Processing of MAPbI3 Films by Flash Annealing and Rapid Growth for High‐Performance Perovskite Solar Cells

“…FIRA process allows the growth of a compact film, resulting in the formation of micrometric scale domains. These domains are composed of many grains with defined growth orientation and same internal structure, characterized by a nucleation center point with defined borders appreciable at micrometer scale which enables optical microscope observations [49,[51][52][53][54] and micrometer resolved Raman spectroscopy and PL. Thus, this work establish the correlation between annealing rates and intrinsic film quality and stability by measuring chronoamperometry and optical absorbance over time while we observe the film surface change by optical image acquisition in transmission mode.…”

Thermally controlled growth of photoactive FAPbI3 films for highly stable perovskite solar cells

“…The key to these analyses is the image-processing of the grain domain shapes which allows us to obtain an empirical relationship between the parameters that govern the crystal growth. 47 Hence, we demonstrate that the photonic annealing approach is a powerful method for film phase transition studies (thermodynamic and structural) and the manufacturing of high-performance devices as the subsequent step. 48…”