Photoinduced absorption spectra in polydiacetylenes for non linear optical applications

• Published in: Synthetic metals Vol. 138; no. 1; pp. 75 - 78
• Main Authors: Comoretto, D., Ottonelli, M., Musso, G.F., Alloisio, M., Cavallo, D., Cuniberti, C., Dell’Erba, C., Dellepiane, G., Soci, C., Rastelli, A., Marabelli, F.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 02-06-2003; Amsterdam Elsevier Science; New York, NY
• Subjects: Applied sciences; Electrical, magnetic and optical properties; Exact sciences and technology; Non linear optics; Organic polymers; Photoexcitation; Photonics; Physicochemistry of polymers; Polydiacetylene; Properties and characterization; Polydiacetylene; Non linear optics; Photoexcitation; Photonics; Substituent effect; Photoluminescence; Diacetylene polymer; Experimental study; Functional polymer; Conjugated polymer; Optical properties; Carbazole derivative polymer; Optical absorption
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/S0379-6779(02)01272-9

We report on the absorption, photoluminescence and photoinduced absorption of polydiacetylenes (PDAs) having in the side groups the photoconductive carbazolyl rings substituted by acyl CO(CH
2)
n
CH
3 chains (
n=10, polyDLCHD;
n=14, polyDPCHD).
A novel feature in the absorption spectra is detected and assigned on the basis of theoretical calculation including the electron correlation. Different features are observed in the photoexcitations spectra of thin and thick samples and a preliminary interpretation is proposed.