Room-temperature liquid diffused separation induced crystallization for high-quality perovskite single crystals

Abstract

Large single crystals serve as an ideal platform for investigating intrinsic material properties and optoelectronic applications. Here we develop a method, namely, room-temperature liquid diffused separation induced crystallization that uses silicone oil to separate the solvent from the perovskite precursors, to grow high-quality perovskite single crystals. The growth kinetics of perovskite single crystals using this method is elucidated, and their structural and optoelectronic properties are carefully characterized. The resultant perovskite single crystals, taking CH3NH3PbBr3 as an example, exhibit approximately 1 µs lifetime, a low trap density of 4.4 × 109 cm−3, and high yield of 92%, which are appealing for visible light or X-ray detection. We hope our findings will be of great significance for the continued advancement of high-quality perovskite single crystals, through a better understanding of growth mechanisms and their deployment in various optoelectronics. The diffused separation induced crystallization strategy presents a major step forward for advancing the field on perovskite single crystals.

Pixellated Perovskite Photodiode on IGZO Thin Film Transistor Backplane for Low Dose Indirect X-Ray Detection

“…The calculated specific sensitivity for the perovskite photodiode under the indirect X-ray detection is ~ 7.2  10 2 μC•mGyair -1 •cm -3 ) (or 16.5 μC•Gyair -1 •cm -2 )) at an Xray dose of 2 mGyair/s. The value is comparable to previous Xray detectors based on perovskite single crystals, [23][24][25] and is 3 times higher than that of α-Se detectors under direct detection. [26] The sensitivity is still lower than that of some perovskite-based direct X-ray detector, such as single crystal perovskite, [27][28][29][30][31] quantum dots, [32] perovskite wafer, [33] 2D hybrid perovskite, [34] and polycrystalline perovskite, [35] which shows a sensitivity of ~10 3 to 10 4 μC Gyair -1 •cm 2 ).…”

Halide Perovskite Single Crystals: Optoelectronic Applications and Strategical Approaches

“…Crystallisation at room temperature is developed as a solution to the heat-induced structure distortion. One of the methods is room-temperature liquid diffused separation induced crystallisation, as reported by Yao et al [92]. A certain amount of silicone oil was added in the precursor as a separation medium.…”

“…(d) Schematic diagram of the room-temperature liquid diffused separation induced crystallisation method. Reproduced with permission from[92]. Copyright 2020, Springer Nature.…”

Atomistic Surface Passivation of CH 3 NH 3 PbI 3 Perovskite Single Crystals for Highly Sensitive Coplanar-Structure X-Ray Detectors

“…Regarding the device structure, the present OIHP SC-based X-ray detectors mainly adopt the vertical sandwich-like structure [ 9 , 11 , 16 , 30 – 33 ], while the devices with a coplanar-structure have seldom been reported. The major advantage of the coplanar-structure is that it differentiates the photosensitization length with the carrier transport distance.…”