Influence of Crystallization Temperature on the Optical Properties of MAPbBr3 Single Crystals

초록

Optical properties of methylammonium lead bromide (MAPbBr(3)) perovskite single crystals grown using a seed-induced inverse temperature crystallization method were studied using photoluminescence (PL) and time-resolved PL measurements. Crystallization rate was observed to be faster with an increasing crystallization temperature. The highest crystal quality was recorded for a sample crystallized at 85 degrees C, and it exhibited the strongest X-ray diffraction peaks and PL intensity. The PL spectra for all samples crystallized at room temperature showed an asymmetric shape with a shoulder in the low energy side; this can be attributed to a photon recycling effect caused by re-emission inside the single crystal. We confirmed that the structural and optical properties of MAPbBr(3) single crystals can be manipulated by modifying the crystallization temperature.

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