Phosphorescence spectra from selected sites of N-ethylcarbazole in n-alkanes

Afterglow Organic Light-Emitting Diode

An afterglow organic light-emitting diode (OLED) that displays electroluminescence with long transient decay after it is turned off is demonstrated. This OLED exhibits blue and green dual emission originating from fluorescence and phosphorescence, respectively. A phosphorescence lifetime of 4.3 s is achieved.

High resolution luminescence spectrometer. 2:data treatment and corrected spectra

In Part 1 [Appl. Opt. 12, 1286 (1973)] we described the design of a high resolution luminescence spectrometer for research purposes. In this paper the computer processing of its digital output is discussed. The data treatment is based upon statistical concepts. Subroutines for wavelength calibration, dark count correction, data smoothing, and curve presentation have been developed. Corrected emission and excitation spectra may be obtained with additional calibration data, and relative quantum yields may be determined. The final luminescence spectra are plotted with their corresponding standard deviations.