See all entries for this property (2 total)
Crystal system: orthorhombic
| a: | 9.1437 (±0.0002) Å |
| b: | 8.6684 (±0.0002) Å |
| c: | 28.5984 (±0.0005) Å |
| α: | 90° |
| β: | 90° |
| γ: | 90° |
Starting materials: Benzylamine (BzA), PbI2, Aq. HI (57%), H3PO2 (50 %)
Product: Orange (BzA)2PbI4 crystals
Description: BzA (214.45 mg) was dissolved in Aq.HI (4.5 ml) treated with hypophosphorous acid (0.5 ml) as a stabilizer. A stoichiometric amount of PbI2 (461.01) was added to the above solution, stirred at 90 °C for 2 h, and cooled to room temperature at a rate of 1 K/hr to induce crystallization. All synthesis was performed at ambient conditions. The as-formed crystals were collected by suction, washed with diethyl ether and dried under vacuum.
Method: single crystal X-ray diffraction
Description: Single crystal X-ray data were collected on a Nonius Kappa CCD single-crystal diffractometer (MoKα, λ = 0.71073 Å) at 180 K.
Starting materials: PbO, HI, H3PO2, benzylamine hydrochloride
Product: Orange plate-like crystals
Description: PbO powder was dissolved in a solution with HI and H3PO2 and heated while stirring for 20 minutes at 120 degrees Celsius. The solution became bright yellow. Benzylamine hydrochloride was then dissolved into another HI solution and also heated (2:1 molar ratio to PbO). Then the latter solution was carefully layered on top of the PbI2 solution and dark orange crystals precipitated upon cooling.
Method: Time-Resolved Photoluminescence Spectroscopy
Description: TR-PL was collected at room temperature using the Hamamatsu C4334 Steakscope streack camera system. The instrument response function is about 30 picoseconds and the temporal resolution after deconvolution fitting is about 10 picoseconds. 400 excitation pulses were generated at a high repetition rate from an ultrafast laser system.
Comment: Selected data: Time = 0.206 ns
Starting materials: PbO, HI, H3PO2, benzylamine hydrochloride
Product: Orange plate-like crystals
Description: PbO powder was dissolved in a solution with HI and H3PO2 and heated while stirring for 20 minutes at 120 degrees Celsius. The solution became bright yellow. Benzylamine hydrochloride was then dissolved into another HI solution and also heated (2:1 molar ratio to PbO). Then the latter solution was carefully layered on top of the PbI2 solution and dark orange crystals precipitated upon cooling.
Method: Diffuse Reflectance Spectra
Description: A Shimadzu UV-3600 UV-vis NIR spectrometer was used to measure optical diffuse reflectance at room temperature. BaSO4 was used as the 100% reflectance reference. Reflectance vs wavelength was used to get the absorption spectrum via the Kubelka-Munk equation, which was then used to extrapolate the optical band gaps.
Crystal system: orthorhombic
| Band gap (optical, diffuse reflectance), eV |
|---|
Starting materials: PbO, HI, H3PO2, benzylamine hydrochloride
Product: Orange plate-like crystals
Description: PbO powder was dissolved in a solution with HI and H3PO2 and heated while stirring for 20 minutes at 120 degrees Celsius. The solution became bright yellow. Benzylamine hydrochloride was then dissolved into another HI solution and also heated (2:1 molar ratio to PbO). Then the latter solution was carefully layered on top of the PbI2 solution and dark orange crystals precipitated upon cooling.
Method: Diffuse Reflectance Spectra
Description: A Shimadzu UV-3600 UV-vis NIR spectrometer was used to measure optical diffuse reflectance at room temperature. BaSO4 was used as the 100% reflectance reference. Reflectance vs wavelength was used to get the absorption spectrum via the Kubelka-Munk equation, which was then used to extrapolate the optical band gaps.