z-Scan characterization of zwitterionic chromophores for optoelectronic switching

Photoluminescence (PL) and photostability measurements have been made on thin films containing the 2nd order nonlinear optic chromophore, PYR-3, and amorphous polycarbonate (APC). We find that the PYR-3 singlet excited state PL lifetime systematically decreases with increasing PYR-3 concentration, which may be due to PYR-3 excited state energy transfer to non-radiative decay sites. There is no correlation between the PL lifetime and the photostability for low optical intensities, and we find that the photobleaching data cannot be modeled with a single photodegradation quantum efficiency. There is an increase in the photostability with increasing optical intensity, and this enhancement is larger for high PYR-3 concentrations. It can be explained by a reduction in the oxygen content by oxygen-mediated photodegradation for the 5% PYR-3/APC films. This also partly explains the enhancement in the 15% PYR-3/APC films, but there is an additional mechanism as well. The photostability can also be improved by adding beta-carotene, which leads to an enhancement factor of greater than 6.

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Growth and characterization studies of 3-aminobenzene sulfonic acid single crystal for thermal application

Gayathiridevi

Pasupathi²,

Deepa³

et al. 2022

Inorganic and Nano-Metal Chemistry

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z-Scan characterization of zwitterionic chromophores for optoelectronic switching

Cited by 4 publications

References 15 publications

Slow evaporation technique to grow 3 – Amino benzene sulfonic acid single crystal for Non-Linear optical (NLO) transmission

Slow evaporation technique to grow 3 – Amino benzene sulfonic acid single crystal for Non-Linear optical (NLO) transmission

The effects of excited state lifetime, optical intensity, and excited state quenchers on the photostability of zwitterionic chromophores

Growth and characterization studies of 3-aminobenzene sulfonic acid single crystal for thermal application

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