C9920 03 spectrometer

Photoluminescence and excitation spectra were recorded with a standard photoluminescence spectrometer (QuantaMaster 40 (PTI)) equipped with a liquid nitrogen cryostat (Oxford OptistatDN). Low temperature and anti-Stokes photoluminescence was measured using a home-built setup. Samples were mounted on a cold finger of a closed cycle helium cryostat (Oxford OptistatDry) or in a Quantum Design Physical Properties Measurement System (PPMS). For photoluminescence measurements, samples were excited by Coherent OBIS Lasers 405 nm LX. For anti-Stokes photoluminescence measurements an OBIS 532 nm LS was used. The diameters of the laser spots on the sample were 2 mm for the 405 nm and 3 mm for the 532 nm laser. The sample emission was collected using an optical fiber arrangement and fed into a monochromator (Shamrock 303i, grating 500 nm blaze, 150 lines per mm) and detected with an intensified chargecoupled device (Andor, iStar A-DH320T-18U-73). A long-pass filter (420 nm) was used for photoluminescence experiments. An additional notch filter (532 nm, Thorlabs) was applied for the anti-Stokes photoluminescence measurements. The absolute PL quantum yield of the investigated films was measured using a Hamamatsu C9920-03 spectrometer with an integrating sphere.

. XRD patterns were acquired on a PAN analytical Empyrean X-ray diffractometer, equipped with a 1.8 kW Cu Kα ceramic X-ray tube and a PIXcel3D 2 × 2 area detector, operating at 45 kV and 40 mA, under ambient conditions using parallel beam geometry and symmetric reflection mode. Samples were prepared by pressing the composite powders onto a quartz zero-diffraction single crystal substrate.
Fabrication and characterization of W-LED. Dry powders of red-and green-emitting CsPbX3/SiOx composites were finely ground in a mortar together with polymethylmethacrylate (PMMA) beads. The resulting powder mixture was then pressed into a solid pellet of 16 mm in diameter and ca. 1-2 mm in height. The as-obtained phosphor pellet was placed on top of a commercial blue LED (Thorlabs LIU470A) with an emission peak at 460 nm. The resulting white light spectrum was measured inside a Hamamatsu C9920-03 spectrometer equipped with an integrating sphere. The luminance was assessed with a Minolta LS-110 Luminance Meter.