Starting materials: C6H16N, HI, PbI2, EtO2
Product: Powder of (C6H13NH3)2PbI4
Description: Prepare hexylammonium iodide salts via neutralization of HI with HA. Remove unreacted species by evaporation. Purify product by recrystallization in minimal diethyl ether/excess hexane and isolate via vacuum filtration. Prepare films by spin-coating or drop-casting solutions (prepared by dissolving HAI and PbI2 powders at a 2.5:1 molar ratio in a 1:0.34 volume ratio mixture of THF and methanol). Spin-coat films from solutions of 20 mg/mL at 2000 rpm for 30 s and anneal for 15 min at 70 °C.
Method: Photoluminescence spectra
Description: Steady-state photoluminescence emission spectra of spin-coated films on glass were measured at room temperature with a step size of 1 nm in an Edinburgh Instruments FLS980 fluorimeter by exciting with monochromated light with a 2 nm bandwidth at 480 nm.