Starting materials: lead iodide (PbI2), hydroiodic acid (HI, 57% w/w aqueous, stabilized with H3PO2), ethanolamine (EOA), diethyl ether
Product: Red single crystals (EOA2PbI4)
Description: PbI2 (0.16 g, 0.35 mmol) is dissolved in HI solution (1 mL). Then, EOA (80 μL, 1.3 mmol) is added. This solution is sonicated at room temperature for five minutes. It is then kept at 3 °C in a fridge. Later, red single crystals can be filtered and washed with diethyl ether. They are vacuum dried overnight.
Method: Diffuse reflectance spectroscopy
Description: Powder samples of EOA2PbI4 were used to measure absorption. Linear absorptions can be determined from measurements of UV-vis reflection.
Comment: A 2D Elliot formula was used to create a fit for the data. This formula can be found in the supporting information of the referenced publication and the files attached to this dataset. The formula can extract the exciton binding energy of this material. The analysis yields an exciton binding energy of ≈ 46 meV.
Starting materials: lead iodide (PbI2), hydroiodic acid (HI, 57% w/w aqueous, stabilized with H3PO2), ethanolamine (EOA), diethyl ether
Product: Red single crystals (EOA2PbI4)
Description: PbI2 (0.16 g, 0.35 mmol) is dissolved in HI solution (1 mL). Then, EOA (80 μL, 1.3 mmol) is added. This solution is sonicated at room temperature for five minutes. It is then kept at 3 °C in a fridge. Later, red single crystals can be filtered and washed with diethyl ether. They are vacuum dried overnight.
Method: Pump-probe spectroscopy
Description: Pump-probe delay spectroscopy was used with single crystals of EOA2PbI4 to measure transient reflectance spectra. A Ti:sapphire laser amplifier (Coherent Astrella, 800 nm, pulse duration ∼60 fs, ∼5 mJ/pulse, and 1 kHz repetition rate) was used for this measurement, and a Helios Ultrafast System was used as the transient reflection spectrometer. A fundamental beam of 800 nm was split into two beams, one being sent to generate the pump pulse and the other focused to create the white light probe (1.6---2.8 eV). The pump beam size was ∼590 μm and the probe size was ∼200 μm. The pump beam was sent directly toward the crystal from 90°, and the probe beam hit the crystal at 45°.
Starting materials: lead iodide (PbI2), hydroiodic acid (HI, 57% w/w aqueous, stabilized with H3PO2), ethanolamine (EOA), diethyl ether
Product: Red single crystals (EOA2PbI4)
Description: PbI2 (0.16 g, 0.35 mmol) is dissolved in HI solution (1 mL). Then, EOA (80 μL, 1.3 mmol) is added. This solution is sonicated at room temperature for five minutes. It is then kept at 3 °C in a fridge. Later, red single crystals can be filtered and washed with diethyl ether. They are vacuum dried overnight.
Method: Pump-probe spectroscopy
Description: Pump-probe delay spectroscopy was used with single crystals of EOA2PbI4 to measure transient reflectance spectra. A Ti:sapphire laser amplifier (Coherent Astrella, 800 nm, pulse duration ∼60 fs, ∼5 mJ/pulse, and 1 kHz repetition rate) was used for this measurement, and a Helios Ultrafast System was used as the transient reflection spectrometer. A fundamental beam of 800 nm was split into two beams, one being sent to generate the pump pulse and the other focused to create the white light probe (1.6---2.8 eV). The pump beam size was ∼590 μm and the probe size was ∼200 μm. The pump beam was sent directly toward the crystal from 90°, and the probe beam hit the crystal at 45°. A Kramers---Kronig transformation was used to obtain the change in absorbance of the reflected light.
See all entries for this property (2 total)
See all entries for this property (2 total)
Crystal system: monoclinic
| Exciton binding energy, meV |
|---|
Starting materials: lead iodide (PbI2), hydroiodic acid (HI, 57% w/w aqueous, stabilized with H3PO2), ethanolamine (EOA), diethyl ether
Product: Red single crystals (EOA2PbI4)
Description: PbI2 (0.16 g, 0.35 mmol) is dissolved in HI solution (1 mL). Then, EOA (80 μL, 1.3 mmol) is added. This solution is sonicated at room temperature for five minutes. It is then kept at 3 °C in a fridge. Later, red single crystals can be filtered and washed with diethyl ether. They are vacuum dried overnight.
Method: Diffuse reflectance spectroscopy
Description: Powder samples of EOA2PbI4 were used to measure absorption. Linear absorptions can be determined from measurements of UV-vis reflection, and a 2D Elliot formula was used to create a fit for the data. This formula can be found in the supporting information of the referenced publication and the files attached to this dataset. The formula can extract the exciton binding energy of this material. The analysis yields an exciton binding energy of ≈ 46 meV.
Crystal system: monoclinic
| Exciton binding energy, meV |
|---|
Starting materials: PbI2, HI(47%), butanolamine (HOC4H8NH2), ethyl acetate
Product: Yellow crystals of bis(4-iodobutylammonium) lead iodide
Description: PbI2 (0.178 mmol; 0.082 g) was dissolved in 1 mL HI solution. Then HOC4H8NH2 (0.449 mmol; 0.040 g) was added. The precipitate was dissolved at 3 mL ethyl acetate and was kept undisturbed at room temperature. It is assumed that there was a substitution reaction that took place where the amine had an alcohol group substituted with an iodide atom.
Method: Reflectance spectroscopy
Description: Powder samples of BIA2PbI4 were tested for absorption. Linear absorption was determined through UV-vis reflection. A Ti:sapphire laser amplifier (Coherent Astrella, 800 nm, pulse duration about 60 fs, about 5 mJ/pulse) was used to test the powder sample.
Comment: A 2D Elliot formula was used to generate an exciton fit for this data. The formula can be found in the supporting information of the reference publication. The exciton binding energy was determined to be about 150 meV.
Crystal system: monoclinic
| Exciton binding energy, meV |
|---|
Starting materials: PbI2, HI(47%), butanolamine (HOC4H8NH2), ethyl acetate
Product: Yellow crystals of bis(4-iodobutylammonium) lead iodide
Description: PbI2 (0.178 mmol; 0.082 g) was dissolved in 1 mL HI solution. Then HOC4H8NH2 (0.449 mmol; 0.040 g) was added. The precipitate was dissolved at 3 mL ethyl acetate and was kept undisturbed at room temperature. It is assumed that there was a substitution reaction that took place where the amine had an alcohol group substituted with an iodide atom.
Method: Reflectance spectroscopy
Description: Powder samples of BIA2PbI4 were tested for absorption. Linear absorption was determined through UV-vis reflection. A Ti:sapphire laser amplifier (Coherent Astrella, 800 nm, pulse duration about 60 fs, about 5 mJ/pulse) was used to test the powder sample.
Comment: A 2D Elliot formula was used to generate an exciton fit for this data. The formula can be found in the supporting information of the reference publication. The exciton binding energy was determined to be about 150 meV.