NDLI: Theoretical and experimental investigations on the photoconductivity and nonlinear optical properties of donor–acceptor π conjugated copolymer, poly(2,5-(3,4-ethylenedioxythiophene)-alt-2,7-(9,9-dioctylfluorene))

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Theoretical and experimental investigations on the photoconductivity and nonlinear optical properties of donor–acceptor π conjugated copolymer, poly(2,5-(3,4-ethylenedioxythiophene)-alt-2,7-(9,9-dioctylfluorene))

Content Provider	Semantic Scholar
Author	Narayanan, Sona Abbas, Anshad Sreejesh Poikavila Raghunathan Sreekumar, Krishnapillai Kartha, Cheranellore Sudha Joseph, Rani
Copyright Year	2015
Abstract	The donor–acceptor (D–A) π conjugated copolymer, poly(2,5-(3,4-ethylenedioxythiophene)-alt-2,7-(9,9-dioctylfluorene)) (P(EDOT–FL)), a photoconductive and nonlinear optical material has been synthesized via, a direct arylation method using palladium acetate as a catalyst and characterized. The theoretical studies along with photophysical and electrochemical studies confirmed that the copolymer exhibited a relatively lower band gap (2.29 eV) than that of polyfluorene. The photoconductivity properties of the P(EDOT–FL):PC61BM films under various illuminations were studied and high photosensitivity was observed at 488 nm. The field dependence of the photoconductivity in P(EDOT–FL):PC61BM blend films showed that the films could withstand up to 75 V μm−1 and the photosensitivity at higher electric fields was even greater than two lakh (at 75 V μm−1, the photosensitivity was 289 742). At higher electric fields, the photocurrent entered into micro ampere ranges. The intensity dependence on the photocurrent in these films was also investigated. Third-order nonlinear optical properties of P(EDOT–FL) under nanosecond laser excitation at 532 nm have been studied by a Z-scan technique. The polymer exhibited a high nonlinear absorption and refraction coefficient. The polymer also showed a good optical limiting response at 532 nm. These results provide an avenue for application of P(EDOT–FL) in photo conducting and nonlinear optical devices.
Starting Page	8657
Ending Page	8668
Page Count	12
File Format	PDF HTM / HTML
DOI	10.1039/C4RA13024C
Volume Number	5
Alternate Webpage(s)	http://www.rsc.org/suppdata/ra/c4/c4ra13024c/c4ra13024c1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C4RA13024C
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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