PL measurements were performed at room temperature (RT) using free-space excitation and collection through a visible-near-infrared microscope objective (Nikon 20×, Nikon Corporation, Tokyo, Japan, NA = 0.40). The sample was excited via a 30 kHz picosecond pulsed diode laser (Master Oscillator Fibre Amplifier, Picoquant, Picoquant GmbH, Berlin, Germany, excitation wavelength at 355 nm, pulse width 50 ps, and power of 10 μW). The PL measurement was based on epifluorescence method. PL spectra were detected using AvaSpec-HERO spectrometer (Avantes BV, Apeldoorn, The Netherlands). The emission was then selected by a band filter at 500 ± 25 nm and detected by a single-photon avalanche photodiode (APD) connected to a time-correlated single-photon counting acquisition module (Edinburgh Instruments, TCC900, Edinburgh Instruments Ltd., Livingstone, United Kingdom). Absorption spectra of perovskite crystals were obtained using ultraviolet-visible (UV-vis) spectrometer (Shimadzu, Model UV-2450). PLQY measurements were carried out by placing the sample inside a Labsphere integrating sphere coupled to a Newton 920 Charge Coupled Device (Andor) through an optical fibre for photon counting. Cobolt 320 nm continuous-wave diode laser was used as an excitation source.
Avaspec hero spectrometer
Manufactured by Avantes
The AvaSpec-HERO is a high-performance spectrometer developed by Avantes. It is designed for a wide range of spectroscopic applications, providing accurate and reliable measurements. The spectrometer features a compact and robust design, making it suitable for laboratory and field use. Its core function is to measure and analyze the spectral properties of various materials and samples.
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Lab products found in correlation
2 protocols using avaspec hero spectrometer
1
Perovskite Photoluminescence Characterization
2
Time-Resolved Photoluminescence Analysis
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The measurements were conducted in an ambient environment at room temperature using a custom-made micro-photoluminescence setup. A pulsed laser with a wavelength of 355 nm (VisUV, PicoQuant) was employed, which ensures a time resolution of 15 ps and a repetition rate of 10 MHz. The laser beam was focused on the samples using a microscope objective (Olympus, 40× objective, NA = 0.65), resulting in a laser beam diameter of approximately 1
µm. The filtered PL signal was using a thermoelectric-cooled Avaspec HERO spectrometer (Avantes, The Netherlands). For TRPL measurements, the laser repetition rate was reduced to 10 MHz, and the PL signal within a specific range of 400 ± 25 nm was selectively isolated using a bandpass filter. The selected PL signal was then directed to a single-photon avalanche photodiode (MicroPhoton Devices, Italy). The timing response was analyzed using time-correlated single-photon counting electronics (Becker and Hickl, Germany).
µm. The filtered PL signal was using a thermoelectric-cooled Avaspec HERO spectrometer (Avantes, The Netherlands). For TRPL measurements, the laser repetition rate was reduced to 10 MHz, and the PL signal within a specific range of 400 ± 25 nm was selectively isolated using a bandpass filter. The selected PL signal was then directed to a single-photon avalanche photodiode (MicroPhoton Devices, Italy). The timing response was analyzed using time-correlated single-photon counting electronics (Becker and Hickl, Germany).
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