Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers
Abstract
Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coef...ficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers.
Keywords:
Anthocyanin / Paper / DSSC / TiO2 / AC conductivity / Contact relaxationSource:
Cellulose, 2015, 22, 1, 779-788Funding / projects:
- Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45020)
- Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites (RS-MESTD-Basic Research (BR or ON)-172056)
- Investigation of the effect of parameters of synthesis and processing on dielectric, optical and magnetic properties, both bulk and surface of crystal and polymeric systems (RS-MESTD-Basic Research (BR or ON)-171029)
- Environment conscious energy efficient building - EU [TAMOP-4.2.2.A-11/1/KONV-2012-0068], European Social Foundation
DOI: 10.1007/s10570-014-0537-3
ISSN: 0969-0239; 1572-882X
WoS: 000350877100064
Scopus: 2-s2.0-84921957423
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Institution/Community
VinčaTY - JOUR AU - Csoka, Levente AU - Dudić, Duško AU - Petronijević, Ivan M. AU - Rozsa, C. AU - Halasz, K. AU - Đoković, Vladimir PY - 2015 UR - https://vinar.vin.bg.ac.rs/handle/123456789/439 AB - Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coefficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers. T2 - Cellulose T1 - Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers VL - 22 IS - 1 SP - 779 EP - 788 DO - 10.1007/s10570-014-0537-3 ER -
@article{ author = "Csoka, Levente and Dudić, Duško and Petronijević, Ivan M. and Rozsa, C. and Halasz, K. and Đoković, Vladimir", year = "2015", abstract = "Poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fiber sheets were prepared as a support material for dye-sensitized solar cells. The study is focused on the effects of different anthocyanins on the photo-induced changes and contact relaxation of the surface AC-conductivity of the papers. The anthocyanins were extracted from purple cabbage, beet-root, plum peel, red vine and red currant juice. The results showed that there were pronounced contact relaxation effects at the interfaces between alumina electrode and the papers, which were further affected by the presence of anthocyanins. The electrode effects are mainly manifested by a decrease in conductance, which falls by about 30 % from its initial value about 400 min after the beginning of the experiment carried out in the dark. The illumination of the samples induces an increase in the magnitude of the observed changes in conductance but does not affect the nature of the relaxation processes. By estimating the temperature coefficients of conductivity of the papers and the changes in temperature during the illumination of the samples, we succeeded to separate the effects of heating from the total effects of illumination on the conductance and susceptance of the papers.", journal = "Cellulose", title = "Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers", volume = "22", number = "1", pages = "779-788", doi = "10.1007/s10570-014-0537-3" }
Csoka, L., Dudić, D., Petronijević, I. M., Rozsa, C., Halasz, K.,& Đoković, V.. (2015). Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers. in Cellulose, 22(1), 779-788. https://doi.org/10.1007/s10570-014-0537-3
Csoka L, Dudić D, Petronijević IM, Rozsa C, Halasz K, Đoković V. Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers. in Cellulose. 2015;22(1):779-788. doi:10.1007/s10570-014-0537-3 .
Csoka, Levente, Dudić, Duško, Petronijević, Ivan M., Rozsa, C., Halasz, K., Đoković, Vladimir, "Photo-induced changes and contact relaxation of the surface AC-conductivity of the paper prepared from poly(ethyleneimine)-TiO2-anthocyanin modified cellulose fibers" in Cellulose, 22, no. 1 (2015):779-788, https://doi.org/10.1007/s10570-014-0537-3 . .