High-quality all-inorganic CsPbBr₃ single crystals prepared by a facile one-step solution growth method

Abstract

High crystalline quality all-inorganic CsPbBr3 single crystals were obtained via a facile one-step solution growth method. The (002) X-ray rocking curve is as narrow as 0.043°.

Ion Migration in the All-Inorganic Perovskite CsPbBr3 and Its Impacts on Photodetection

“…The all-inorganic perovskite CsPbBr 3 single crystals were prepared using a modified low-temperature one-step solution growth method according to a previous report (see Methods), where the CsPbBr 3 single crystals (Figure a inset) were obtained by heating the precursor solution in an oil bath at 140 °C (Figure S1, Supporting Information). It showed that the oil bath heating was critical for the improvement of crystalline quality and reduction of trap states ( n trap ∼ 5.1 × 10 9 cm –3 ) in the as-grown CsPbBr 3 single crystals Figure a depicts the typical X-ray diffraction (XRD) pattern of the as-grown CsPbBr 3 single crystal.…”

“…It showed that the oil bath heating was critical for the improvement of crystalline quality and reduction of trap states (n trap ∼ 5.1 × 10 9 cm −3 ) in the asgrown CsPbBr 3 single crystals. 17 Figure 1a depicts the typical X-ray diffraction (XRD) pattern of the as-grown CsPbBr 3 single crystal. As shown, the XRD pattern is dominated by the set of (0 0 l)/(h h 0) crystalline plane of orthorhombic CsPbBr 3 .…”

“…Notably, it showed that the density of defects in the solution-grown LHP single crystals was only ∼10 9 –10 11 cm –3 , which is about 6–7 orders of magnitude less than that in their polycrystalline films. − The ultralow concentration of defects guarantees the as-fabricated PDs with a low dark current and produces a high photoresponsivity to the light signal simultaneously. Very recently, we have demonstrated the growth of high crystalline quality all-inorganic perovskite CsPbBr 3 single crystals via a modified low-temperature one-step solution growth method, in which the defects were shown as low as ∼10 9 cm –3 . , On this basis, Au/CsPbBr 3 /Au metal–semiconductor–metal (MSM)-structured visible light PDs have been fabricated with the photoresponsivity of 0.088 A/W . Notably, the photoresponsivity has increased to as high as 0.61 A/W after the decoration of Au nanoparticles on the CsPbBr 3 single crystals .…”

“…Very recently, we have demonstrated the growth of high crystalline quality all-inorganic perovskite CsPbBr 3 single crystals via a modified low-temperature onestep solution growth method, in which the defects were shown as low as ∼10 9 cm −3 . 12,17 On this basis, Au/CsPbBr 3 /Au metal−semiconductor−metal (MSM)-structured visible light PDs have been fabricated with the photoresponsivity of 0.088 A/W. 12 Notably, the photoresponsivity has increased to as high as 0.61 A/W after the decoration of Au nanoparticles on the CsPbBr 3 single crystals.…”

Near-Net-Shaped Growth of Inch-Sized MAPbBr3 Bulk Crystal by the Space-Confined Seeded Solution Method

“…In terms of perovskite crystals grown by space-confined methods, many ideas were employed to develop large-sized bulk crystals and thin films. − For example, Liu et al reported thickness-controllable ultrathin MAPbI 3 SCs by employing a geometry-regulated dynamic flow reaction system. Chen et al employed a facile space-confined solution-processed strategy to grow MPB single-crystalline thin films on substrates in submillimeter dimension.…”