What question did this study set out to answer?

To determine the nature of optical excitations and photo-induced infrared absorption mechanisms in polydiacetylenes PDA-10H and PDA-TS.

November 14, 1987Journal of Physics D Applied PhysicsOpen Access

Infrared studies of optically excited polydiacetylene

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Authors

FPF. L. PrattRutherford Appleton Laboratory KWKam Sing WongChinese University of Hong Kong WHW. HayesUniversity of Lincoln

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Implication

Optical spectroscopy demonstrates persistent photo-induced infrared absorption from charged bipolarons in PDA-10H, highlighting electron correlation and strong electron-phonon coupling.

Key Points

To determine the nature of optical excitations and photo-induced infrared absorption mechanisms in polydiacetylenes PDA-10H and PDA-TS.
Measured optical excitation and infrared photo-induced absorption spectra in polydiacetylene samples (PDA-10H and PDA-TS).
Characterized carrier lifetimes, trapping effects, and the spectral overlap between electronic transitions and vibrational modes.
Observed infrared photo-induced absorption in PDA-10H indicating charged bipolaron generation and persistent carrier lifetimes due to trapping, whereas PDA-TS showed no comparable absorption, consistent with triplet excitonic bipolarons.
Identified significant electron correlation shifting electronic transitions to lower energies in PDA-10H, causing electronic-vibrational overlap and strong anti-resonances via electron-phonon interactions.

Cite This Study

Pratt et al. (1987) studied this question.

synapsesocial.com/papers/6a906578f5c79ce9992db0e3 https://doi.org/10.1088/0022-3727/20/11/004

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Implication

Optical spectroscopy demonstrates persistent photo-induced infrared absorption from charged bipolarons in PDA-10H, highlighting electron correlation and strong electron-phonon coupling.

Infrared studies of optically excited polydiacetylene

Discussion

Member takes

Implication

Key Points

Cite This Study

Infrared studies of optically excited polydiacetylene

Discussion

Member takes

Implication

Key Points

Cite This Study

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