Crystal system: triclinic
| a: | 11.5583 (±0.0006) Å |
| b: | 11.6234 (±0.0005) Å |
| c: | 17.3131 (±0.0007) Å |
| α: | 80.299 (±0.004)° |
| β: | 74.26 (±0.004)° |
| γ: | 89.849 (±0.004)° |
Starting materials: SnBr2, C6H5CH2CH2NH3Br, HBr, H3PO2
Product: yellow flake single crystals
Description: Growing the single crystal through the slow cooling process from 100 °C to room temperature. 2.0 mmol of SnBr2 and 4.0 mmol of PEABr are dissolved in a mixture of HBr (3 mL) and H3PO2 (1 mL) after magnetic stirring and nitrogen flow for ∼5 min at 100 °C. The solution is slowly cooled from 100 °C to room temperature. The obtained yellow flake single crystals are washed using acetone and ethyl ether and then dried under reduced pressure.
Method: single-crystal X-ray diffraction
Description: A Rigaku XtaLAB Synergy-S diffractometer using a HyPix-6000HE Hybrid Photon Counting (HPC) detector and a dual Mo and Cu microfocus sealed X-ray source as well as a low-temperature Oxford Cryosystem 800 is utilized to collect single-crystal X-ray data.
Crystal system: unknown
| Band gap (fundamental), eV |
|---|
Starting materials: PEABr salt, SnBr2 salt, stoichiometric ratio 2:1
Product: spin-coated thin film
Description: Starting materials dissolved in 4:1 DMF:DMSO solvent mixture, stirred for 30 min at room temperature. Substrate: Quartz substrate with 120 nm gold layer with inerdigitated fingers. Precursor solution (0.1-0.3 molar) pipetted onto substrate and spin-coated, 4000 rpm / 30 seconds, targeting film thicknesses 80-300 nm.
Method: Electroabsorption
Description: Films were spin-coated onto interdigitated Au electrode array - 45 micron distance between opposing fingers. Samples mounted in cryostat with Cu wires soldered to opposing electrode stripes. Xe lamp light spectrally filtered, focused on sample and subsequently on UV-enhanced Si photodiode detector. Sample transmission, substrate transmission, and sample electrotransmission were collected in independent scans. Absorbance and electroabsorbance were then calculated from the respective transmissions. The fundamental gap is determined by the crossover point of absorption curves measured under different electric fields in the fundamental band gap region.
Comment: Significantly more detail in paper.
Crystal system: unknown
| Exciton binding energy, eV |
|---|
Starting materials: PEABr salt, SnBr2 salt, stoichiometric ratio 2:1
Product: spin-coated thin film
Description: Starting materials dissolved in 4:1 DMF:DMSO solvent mixture, stirred for 30 min at room temperature. Substrate: Quartz substrate with 120 nm gold layer with inerdigitated fingers. Precursor solution (0.1-0.3 molar) pipetted onto substrate and spin-coated, 4000 rpm / 30 seconds, targeting film thicknesses 80-300 nm.
Method: Electroabsorption
Description: Films were spin-coated onto interdigitated Au electrode array - 45 micron distance between opposing fingers. Samples mounted in cryostat with Cu wires soldered to opposing electrode stripes. Xe lamp light spectrally filtered, focused on sample and subsequently on UV-enhanced Si photodiode detector. Sample transmission, substrate transmission, and sample electrotransmission were collected in independent scans.Absorbance and electroabsorbance were then calculated from the respective transmissions. The exciton binding energy arises as the difference of the 1s exciton peak energy observed in conventional absorption and the fundamental gap as determined by the crossover point of absorption curves measured under different electric fields in the fundamental band gap region.
Comment: Significantly more detail in paper.
Crystal system: unknown
| Exciton energy, eV |
|---|
Starting materials: PEABr salt, SnBr2 salt, stoichiometric ratio 2:1
Product: spin-coated thin film
Description: Starting materials dissolved in 4:1 DMF:DMSO solvent mixture, stirred for 30 min at room temperature. Substrate: Quartz substrate with 120 nm gold layer with inerdigitated fingers. Precursor solution (0.1-0.3 molar) pipetted onto substrate and spin-coated, 4000 rpm / 30 seconds, targeting film thicknesses 80-300 nm.
Method: Electroabsorption
Description: Films were spin-coated onto interdigitated Au electrode array - 45 micron distance between opposing fingers. Samples mounted in cryostat with Cu wires soldered to opposing electrode stripes. Xe lamp light spectrally filtered, focused on sample and subsequently on UV-enhanced Si photodiode detector. Sample transmission, substrate transmission, and sample electrotransmission were collected in independent scans. Absorbance and electroabsorbance were then calculated from the respective transmissions.
Comment: Significantly more detail in paper.