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Studies of Optical Properties of Protonated Polyazomethine Thin Films

100%
Bednarski H., Weszka J., Domański M., Cozan V.
Acta Physica Polonica A
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2011
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vol. 120
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issue 5
939-941
EN
We report results of experimental studies supplemented with the first principles calculations aimed to explain influence of doping on electronic and optoelectronic properties of thin PPI films. It has been predicted theoretically and confirmed experimentally that chemical doping with the HCl acid vapor is thermally reversible process due to relatively low energy barrier for protonation.
2
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Studies of Transport Properties of Single Layer Devices Based on the Polyazomethine Thin Films

76%
Weszka J., Domański M., Jurusik J., Hajduk B., Chwastek M., Bednarski H.
Acta Physica Polonica A
|
2011
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vol. 120
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issue 5
936-938
EN
This work reports results of studies on transport properties of single-layer devices based on polyazomethine thin films with different metal electrodes. Recorded I-V characteristics of Au-PPI-Au and Au-PPI-Al structures were analyzed in detail. It appears that I-V characteristics of Au-PPI-Au structures are consistent with the Mott-Gurney law with the mobility value of 2× 10^{-6} cm^2/(V s). Relatively low current in Au-PPI-Al devices is attributed to high value of the Schottky barrier and/or due to low density of longer conjugated segments in polyazomethine thin films.
3
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Stability of Diodes with Poly(3-hexylthiophene) and Polyazomethines Thin Organic Layer

76%
Bednarski H., Gąsiorowski J., Domański M., Hajduk B., Jurusik J., Jarząbek B., Weszka J.
Acta Physica Polonica A
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2012
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vol. 122
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issue 6
1083-1086
EN
Herein we report results of studies on stability of diodes based on organic semiconductors such as poly (3-hexylthiophene) (P3HT) and soluble derivative of polyazomethine poly(1,4-(2,5-bisoctyloxy phenylenemethylidynenitrilo)-1,4-phenylenenitrilomethylidyne), (BOO-PPI). Both polymers were deposited on glass/ITO substrate with or without covering with blocking layer: poly(3,4-ethylenedioxythiophene):poly(4-styrene sulfonate) (PEDOT:PSS) and finished with Al back electrode. Prepared devices were studied by monitoring their electrical conductivity under nitrogen atmosphere and ambient air conditions. Under nitrogen atmosphere a marked influence of presence of the blocking layer on the diodes electrical conductivity was revealed. The P3HT diodes prepared without PEDOT:PSS thin film shown quick degradation, whereas presence of these layers stabilizes electrical conductivity in these devices. Inversely, the PPI based diodes without the PEDOT:PSS revealed stable conducting properties, while corresponding diodes with PEDOT:PSS layer showed degradation traces of their conducting properties.
4
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The Influence of PEDOT to PSS Ratio on the Optical Properties of PEDOT:PSS Thin Solid Films - Insight from Spectroscopic Ellipsometry

64%
Bednarski H., Hajduk B., Jurusik J., Jarząbek B., Domański M., Łaba K., Wanic A., Łapkowski M.
Acta Physica Polonica A
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2016
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vol. 130
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issue 5
1242-1244
EN
In this work, we study the influence of the PEDOT to PSS ratio on the optical properties of PEDOT:PSS thin solid films using spectroscopic ellipsometry and UV-vis spectrometry. In the data analysis, we develop a consisted composition dependent optical model of PEDOT:PSS. This enabled us to account for contributions from PSS part within the Tauc-Lorentz optical model and from PEDOT part within the Drude-Lorentz optical model. Moreover, we relate the optical properties of PEDOT:PSS thin solid films to their electrical specific conductivities in the frame of the generalized effective medium theory. Determined in this manner electrical conductivities of five commercially available water dispersions of PEDOT:PSS are compared with their nominal values.
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