Monitoring the Formation of a CH3NH3PbI3–xClx Perovskite during Thermal Annealing Using X‐Ray Scattering

W2396321232 · 수집 2026-10-04 18:12:25

T10321 Quantum Dots Synthesis And Properties

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Grazing incidence wide and small angle X‐ray scattering (GIWAXS and GISAXS) measurements have been used to study the crystallization kinetics of the organolead halide perovskite CH 3 NH 3 PbI 3– x Cl x during thermal annealing. In situ GIWAXS measurements recorded during annealing are used to characterize and quantify the transition from a crystalline precursor to the perovskite structure. In situ GISAXS measurements indicate an evolution of crystallite sizes during annealing, with the number of crystallites having sizes between 30 and 400 nm increasing through the annealing process. Using ex situ scanning electron microscopy, this evolution in length scales is confirmed and a concurrent increase in film surface coverage is observed, a parameter crucial for efficient solar cell performance. A series of photovoltaic devices are then fabricated in which perovskite films have been annealed for different times, and variations in device performance are explained on the basis of X‐ray scattering measurements.

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Monitoring the Formation of a CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3–</sub><i><sub>x</sub></i>Cl<i><sub>x</sub></i> Perovskite during Thermal Annealing Using X‐Ray Scattering

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