Crystal system: orthorhombic
a: | 39.285 (±0.002) Å |
b: | 8.2868 (±0.0005) Å |
c: | 8.1518 (±0.0004) Å |
α: | 90° |
β: | 90° |
γ: | 90° |
Crystal system: orthorhombic
a: | 39.42 (±0.006) Å |
b: | 8.3332 (±0.0013) Å |
c: | 8.2052 (±0.0012) Å |
α: | 90° |
β: | 90° |
γ: | 90° |
Crystal system: orthorhombic
a: | 39.406 (±0.003) Å |
b: | 8.3365 (±0.0005) Å |
c: | 8.2153 (±0.0005) Å |
α: | 90° |
β: | 90° |
γ: | 90° |
Crystal system: orthorhombic
a: | 39.531 (±0.003) Å |
b: | 8.3573 (±0.0006) Å |
c: | 8.248 (±0.0006) Å |
α: | 90° |
β: | 90° |
γ: | 90° |
Crystal system: orthorhombic
a: | 39.95 (±0.003) Å |
b: | 8.373 (±0.0007) Å |
c: | 8.3165 (±0.0007) Å |
α: | 90° |
β: | 90° |
γ: | 90° |
Crystal system: tetragonal
a: | 5.9098 (±0.0005) Å |
b: | 5.9098 (±0.0005) Å |
c: | 40.382 (±0.005) Å |
α: | 90° |
β: | 90° |
γ: | 90° |
Starting materials: BABr (synthesized), CsBr, PbBr2, HBr
Product: Yellow single crystals
Description: (BA)2CsPb2Br7 crystals were synthesized by mixing BABr, CsBr, and PbBr2 into a saturated HBr solution at a molar ratio of 3:1:2. Complete dissolution was achieved by heating to 100°C with constant stirring for ~30 minutes. Upon slowly cooling, at a rate of 20°C/min to room temperature, the crystals precipitated. The crystals were removed by suction filtration and were dried in a vacuum.
Method: Single-crystal X-ray diffraction
Description: A synchrotron radiation source ( λ = 0.7749 Å) in a nitrogen atmosphere was used for the SCXRD data. The crystals were mounted on a Bruker diffractometer using a Kapton tip. Nitrogen cryogen with a temperature controller precisely adjusted the temperature during measurement. APEX 3 software was used for data reduction and SADABS software was used for multiscan absorption correction. Structure calculations were performed using the SHELXTL program.
Starting materials: BABr (synthesized), CsBr, PbBr2, HBr
Product: Yellow single crystals
Description: (BA)2CsPb2Br7 crystals were synthesized by mixing BABr, CsBr, and PbBr2 into a saturated HBr solution at a molar ratio of 3:1:2. Complete dissolution was achieved by heating to 100°C with constant stirring for ~30 minutes. Upon slowly cooling, at a rate of 20°C/min to room temperature, the crystals precipitated. The crystals were removed by suction filtration and were dried in a vacuum.
Method: UV-vis absorption
Description: A Shimadzu UV-3101 UV-vis spectrophotometer was used to measure the absorption spectra.
Crystal system: orthorhombic
Band gap (optical, transmission), eV |
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Starting materials: BABr (synthesized), CsBr, PbBr2, HBr
Product: Yellow single crystals
Description: (BA)2CsPb2Br7 crystals were synthesized by mixing BABr, CsBr, and PbBr2 into a saturated HBr solution at a molar ratio of 3:1:2. Complete dissolution was achieved by heating to 100°C with constant stirring for ~30 minutes. Upon slowly cooling, at a rate of 20°C/min to room temperature, the crystals precipitated. The crystals were removed by suction filtration and were dried in a vacuum.
Method: UV-vis absorption
Description: A Shimadzu UV-3101 UV-vis spectrophotometer was used to measure the absorption spectra.
Starting materials: BABr (synthesized), CsBr, PbBr2, HBr
Product: Yellow single crystals
Description: (BA)2CsPb2Br7 crystals were synthesized by mixing BABr, CsBr, and PbBr2 into a saturated HBr solution at a molar ratio of 3:1:2. Complete dissolution was achieved by heating to 100°C with constant stirring for ~30 minutes. Upon slowly cooling, at a rate of 20°C/min to room temperature, the crystals precipitated. The crystals were removed by suction filtration and were dried in a vacuum.
Method: Photoluminescence microscopy
Description: PL spectra were recorded in a PL microscope. A Janish Research Company ST-500 microscope cryostat using a Coherent OBIS 375LX laser was used for the measurements.
Crystal system: orthorhombic
Photoluminescence peak position, nm |
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Starting materials: BABr (synthesized), CsBr, PbBr2, HBr
Product: Yellow single crystals
Description: (BA)2CsPb2Br7 crystals were synthesized by mixing BABr, CsBr, and PbBr2 into a saturated HBr solution at a molar ratio of 3:1:2. Complete dissolution was achieved by heating to 100°C with constant stirring for ~30 minutes. Upon slowly cooling, at a rate of 20°C/min to room temperature, the crystals precipitated. The crystals were removed by suction filtration and were dried in a vacuum.
Method: Photoluminescence microscopy
Description: PL spectra were recorded in a PL microscope. A Janish Research Company ST-500 microscope cryostat using a Coherent OBIS 375LX laser was used for the measurements.