Photoluminescence of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) in the visible region

Koyama, Takeshi; Matsuno, Taiki; Yokoyama, Yasunori; Kishida, Hideo

doi:10.1039/c5tc01531f

Cited by 24 publications

(14 citation statements)

References 21 publications

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“…The broadband emission can be attributed to the formation of the excimer due to aromatic group interaction. The broadband visible luminescence with the maximum at 2.3 eV was reported recently by Kayoma, [ 27 ] and was attributed to PSS. The blueshift of the maximum energy in our samples can be explained by the strong dependence of the emission from PSS on the excitation wavelength.…”

Section: Resultssupporting

confidence: 60%

Influence of Surface Polarity on Optoelectronic Properties of PEDOT:PSS/ZnO Hybrid Heterojunctions

Yatskiv

Grym

Tiagulskyi

et al. 2021

Physica Status Solidi (a)

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The influence of polar and nonpolar crystallographic orientations of ZnO substrates on the current transport mechanism in poly(3,4‐ethylenedioxythiophene) poly(4‐styrenesulfonate) (PEDOT:PSS)/ZnO heterojunctions is investigated by DC and AC electrical measurements. It is shown that PEDOT:PSS forms high‐quality rectifying junctions on nonpolar planes of n‐type ZnO substrates, whereas on polar c‐planes, the quality of the junction is affected by the surface polarity, with lower‐quality junctions formed on the O‐polar c‐plane. The lower quality of the junction is attributed to partial degradation of the O‐polar surface caused by the acidic nature of PEDOT:PSS. By the analysis of current–voltage characteristics, it is demonstrated that the recombination‐tunneling mechanism dominates charge transport in the forward direction. An equivalent circuit is proposed to interpret the data obtained by impedance spectroscopy and the parameters of the equivalent circuit are extracted.

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Section: Resultssupporting

confidence: 60%

Influence of Surface Polarity on Optoelectronic Properties of PEDOT:PSS/ZnO Hybrid Heterojunctions

Yatskiv

Grym

Tiagulskyi

et al. 2021

Physica Status Solidi (a)

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“…A spectral response function was obtained using a tungsten standard lamp. Because this measurement system can detect weak Raman scattering signals in doped polythiophenes, PL signals, if weak, are also measurable …”

Section: Methodsmentioning

confidence: 99%

Excitation Energy Transfer by Electron Exchange via Two-Step Electron Transfer between a Single-Walled Carbon Nanotube and Encapsulated Magnesium Porphyrin

et al. 2020

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Because of the strong photoabsorption of porphyrin and its derivatives in the visible light region, composites of porphyrin−carbon nanotubes show promise as materials for photovoltaic and photoenergy transfer applications. Studies have reported the photoexcited states of functionalized carbon nanotube composites containing externally attached porphyrin. However, the photoexcited states of carbon nanotube composites containing encapsulated porphyrin moieties have not been investigated. The enhancement of photostability and chemical stability of porphyrins, which is crucial in device applications, is expected in these composites. In this study, we fabricated a composite of single-walled carbon nanotubes and encapsulated porphyrins to investigate ultrafast relaxation dynamics of photoexcited states by steady-state measurements and femtosecond time-resolved measurements. We found that excitation energy transfer by electron exchange via two-step electron transfer between the encapsulated porphyrin and single-walled carbon nanotube occurs in the femtosecond regime. This study provides an insight into photovoltaic functionality and photoenergy transfer in molecule-encapsulating materials.

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“…Photoluminescence from PEDOT:PSS has not been extensively investigated so far, hence controversy still remains regarding the identification of the PL emission. Koyama et al [32] attributed PSS to be responsible for PL emission from 1.2 to 3 eV. Some other authors [21] proposed emissions around 3 eV are due to PSS chains.…”

Section: Pedot:pss Polymermentioning

confidence: 99%

“…Some authors reported that, when the surface of the nanoparticles embedded in the polymer is positively charged, the negatively charged PSS chains can be electrostatically attracted, leading to changes in the PEDOT:PSS chains' configuration, which can enhance the electrical conductivity [21]. Rearrangement of the PEDOT:PSS can lead to better pathways for charge transport-actually, an expanded-coil configuration is usually associated with improved conductivity [32]. Hence, in this case, synergy between the counterparts in the composite leads to improved electrical performance.…”

Section: Hybrid Composite (Sno and Pedot:pss)mentioning

confidence: 99%

Synergetic Improvement of Stability and Conductivity of Hybrid Composites formed by PEDOT:PSS and SnO Nanoparticles

et al. 2020

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In this work, layered hybrid composites formed by tin oxide (SnO) nanoparticles synthesized by hydrolysis and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) have been analyzed. Prior to the composite study, both SnO and PEDOT:PSS counterparts were characterized by diverse techniques, such as X-ray diffraction (XRD), Raman spectroscopy, transmission electron microscopy (TEM), photoluminescence (PL), atomic force microscopy (AFM), optical absorption and Hall effect measurements. Special attention was given to the study of the stability of the polymer under laser illumination, as well as the analysis of the SnO to SnO2 oxidation assisted by laser irradiation, for which different laser sources and neutral filters were employed. Synergetic effects were observed in the hybrid composite, as the addition of SnO nanoparticles improves the stability and electrical conductivity of the polymer, while the polymeric matrix in which the nanoparticles are embedded hinders formation of SnO2. Finally, the Si passivation behavior of the hybrid composites was studied.

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Photoluminescence of poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) in the visible region

Cited by 24 publications

References 21 publications

Influence of Surface Polarity on Optoelectronic Properties of PEDOT:PSS/ZnO Hybrid Heterojunctions

Influence of Surface Polarity on Optoelectronic Properties of PEDOT:PSS/ZnO Hybrid Heterojunctions

Excitation Energy Transfer by Electron Exchange via Two-Step Electron Transfer between a Single-Walled Carbon Nanotube and Encapsulated Magnesium Porphyrin

Synergetic Improvement of Stability and Conductivity of Hybrid Composites formed by PEDOT:PSS and SnO Nanoparticles

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