Dataset for temperature-dependent three-photon excited luminescence of AZRPbCl₃(800 nm) to paper "Phase Transitions, Dielectric Response, and Nonlinear Optical Properties of Aziridinium Lead Halide Perovskites" <i>Chem. Mater.</i> <b>2023</b>, 35, 22, 9725–9738

Experimental conditions [1]Nonlinear optical experiments were performed using a laser system employing a wavelength-tunable Topaz Prime Vis-NIR optical parametric amplifier (OPA) pumped by a Coherent Astrella Ti:Sapphire regenerative amplifier providing femtosecond laser pulses (800 nm, 75 fs) at 1 kHz repetition rate. Experiments employing 1300 nm laser pulses used the attenuated output of a tunable OPA. Experiments employing 800 nm laser pulses used the output of regenerative amplifier passed through a 5 mm aperture. Laser fluence at samples was equal to 0.21 mJ/cm2 (1300 nm) and 0.30 mJ/cm2 (800 nm). The single crystals of AZRPbCl3, AZRPbBr3, and AZRPbI3 were crushed with a spatula and sieved through an Aldrich mini-sieve set, collecting a microcrystal size fraction of 63–88 μm. The size-graded samples were fixed in-between microscope glass slides to form tightly packed layers, sealed, and mounted to the horizontally aligned sample holder. No refractive index matching oil was used. The employed measurement setup operates in the reflection mode. Specifically, the laser beam was directed onto the sample at 45 degrees to its surface. Emission collecting optics consisted of a Ø25.0 mm plano-convex lens of a 25.4 mm focal length mounted to a 400 μm 0.22 NA glass optical fiber, which was placed along the normal to the sample surface. The distance between the collection lens and the sample was equal to 30 mm. The spectra of the temperature-dependent NLO responses were recorded by an Ocean Optics Flame T XR fiber-coupled CCD spectrograph with a 200 μm entrance slit. Scattered pumping radiation was suppressed with the use of a Thorlabs 750 nm shortpass dielectric filter (FESH0750) for studies on AZRPbCl3 and AZRPbBr3, and a 1100 nm shortpass dielectric filter (FESH1100) in the case of AZRPbI3. Temperature control of the sample was performed using a Linkam LTS420 Heating/Freezing Stage and the measurements were performed in a temperature range of 93-293 K upon heating and cooling runs with a constant dT/dt of 10Kmin-1. Temperature stability was equal to 0.1 K. [1] - Chem. Mater. 2023, 35, 22, 9725–9738 Related resourcesSee Jan Zareba's publication record for more examples of temperature-dependent studies of lead halide perovskites (methylhydrazinium, imidazolium and others)