Time–space conversion spectral analysis for the nanosecond fluorescent processes of organic–inorganic compounds

• Published in: AIP advances Vol. 10; no. 7; pp. 075214 - 075214-7
• Main Authors: Saito, Mitsunori, Itai, Yusuke
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 01-07-2020; AIP Publishing LLC
• Subjects: Continuous wave lasers; Excitation; Fluorescence; Inorganic compounds; Laser beams; Lasers; Phosphors; Pulsed lasers; Spatial distribution; Spectra; Spectrum analysis; Temporal resolution
• ISSN: 2158-3226; 2158-3226
• DOI: 10.1063/5.0008764

Time-resolved spectral measurements were conducted by using a continuous-wave laser and a CCD-based spectrometer. A spinning polygon mirror swung both the excitation laser beam and fluorescent rays, in the process of which a temporal change in the fluorescent spectrum was converted to a spatial distribution. The temporal resolution could be adjusted in the nano- and micro-second ranges by changing the rotation rate of the mirror. In comparison with the conventional pulsed-laser spectrometry, a higher sensitivity is attainable due to the slow features of the devices, i.e., continuous excitation by the laser and a long exposure time (1 s) of the CCD. The usefulness and reliability of the constructed system were demonstrated by spectral measurements of an organic–inorganic hybrid phosphor, which exhibited both a rapid fluorescent decay of organic ligands and a long-lasting afterglow of metal ions.