Preparation of conducting polyanilines doped with Keggin-type polyoxometalates and their application as counter electrode in dye-sensitized solar cells

Almeida, Luiz Carlos Pimentel; Gonçalves, Agnaldo de Souza; Benedetti, João E.; Miranda, Paulo C. M. L.; Passoni, Luís C.; Nogueira, Ana F.

doi:10.1007/s10853-010-4456-x

Cited by 38 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The delocalized electrons along the polymer chains are responsible for tunable energy gap which is typically in the range of 1-3 eV [2]. Such characteristics make them appropriate candidates for various applications including light-emitting diodes [3], photodiodes [4], photovoltaic devices [5,6], Schottky junctions [7,8] laser devices [9] and chemical sensors [10]. Particular attention has been devoted to the preparation and characterization of poly(o-toluidine) (POT) for electronic and optoelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Current–voltage characteristics and inhomogeneous barrier height analysis of Au/poly(o-toluidine)/p-Si/Al heterojunction diode

El-Menyawy¹,

Ashery²

2014

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Thin films of poly(o-toluidine) (POT) with amorphous structure were prepared onto the surface of p-Si single crystal by spin coating technique. The electrical conduction mechanisms and related parameters of the Au/ POT/p-Si/Al heterojunction diode were investigated using current-voltage (I-V) characteristics in temperature range 298-378 K. The device showed rectifying behavior. At relatively low forward applied voltages; the current through the junction has been analyzed on the bases of the standard thermionic emission theory. The ideality factor decreases with increasing temperature, whereas the barrier height increases. This behavior could be elucidated in terms of inhomogeneity model of barrier heights. In addition, the values of series resistance, ideality factor and effective barrier height at zero-bias are determined at different temperatures by using Cheung's functions. At relatively high forward bias voltages, analysis of the double logarithmic I-V characteristics indicates that transport through the device is controlled by a space-charge-limited current process characterized by single trap of distribution in which the related parameters are estimated. Data analysis in reverse direction showed that the current can be described in terms of Poole-Frenkel mechanism at low applied voltage and in terms of Schottky mechanism at higher applied voltage.

show abstract

Section: Introductionmentioning

confidence: 99%

Current–voltage characteristics and inhomogeneous barrier height analysis of Au/poly(o-toluidine)/p-Si/Al heterojunction diode

El-Menyawy¹,

Ashery²

2014

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

show abstract

“…The covalent bond between Mo‐based polyoxometalate and ferrocenyl donors leads to efficient charge transfer through a long distance . H 3 PMo 12 O 40 ‐based polyoxomolybdate is applied in the counter electrode of a dye‐sensitized solar cell with a composite formed by the polyoxomolybdate and polyaniline . Upon the modulation of the electron donating and withdrawing groups in molybdenum‐based polyoxometalates, the spacer group, the Lindqvist structure and the –NH 2 group are proposed to be important for the p‐type dye‐sensitized solar cells performance .…”

Section: Polyoxomolybdatementioning

confidence: 99%

“…253 H 3 PMo 12 O 40 -based polyoxomolybdate is applied in the counter electrode of a dye-sensitized solar cell with a composite formed by the polyoxomolybdate and polyaniline. 254 Upon the modulation of the electron donating and withdrawing groups in molybdenum-based polyoxometalates, the spacer group, the Lindqvist structure and the -NH 2 group are proposed to be important for the p-type dye-sensitized solar cells performance. [255][256][257] Attaching [PMo 12 O 40 ] 3− on metal oxide substrate has been attempted for similar optoelectronic applications.…”

Section: Polyoxotungstatementioning

confidence: 99%

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Zhang

Chen

2020

Int J Energy Res

View full text Add to dashboard Cite

Summary Polyoxometalates could be viewed as the molecular counterpart of the metal oxides, which are essential ingredients for various energy conversion and storage applications. In this manuscript, we review the progress of engineering functional polyoxometalates toward energy applications, focusing on, but not limited to, polyoxotitanate, polyoxotungstate, and polyoxomolybdate. These polyoxometalates are considered to be promising candidates for dye‐sensitized solar cell, perovskite solar cell, lithium‐ion battery, lithium‐sulfur battery, supercapacitor, and water‐splitting system. We believe advanced energy devices with better performance could be derived from further engineering the polyoxometalates owing to their molecular design flexibility.

show abstract

“…), followed by ether extraction and crystallization, as described elsewhere, with minor modifications [20]. The silver salts of the HPAs were prepared by simple precipitation with silver nitrate solution, and the precipitate obtained was washed and dried prior to use.…”

Section: Synthesis Of Hpa Saltsmentioning

confidence: 99%

Antifungal activity of silver salts of Keggin-type heteropolyacids against Sporothrix spp.

Mathias

Almeida

Passoni

et al. 2020

Journal of Microbiology and Biotechnology

View full text Add to dashboard Cite

Sporotrichosis is a chronic and subacute mycosis causing epidemiological outbreaks involving sick cats and humans in southeastern Brazil. The systemic disease prevails in cats and in humans, with the symptoms restricted to the skin of immunocompetent individuals. Under these conditions, the prolonged treatment of animals and cases of recurrence justify the discovery of new treatments for sporotrichosis. This work addresses the antifungal activity of silver salts of Keggin-type heteropolyacid salts (Ag-HPA salts) such as Ag 3 [PW 12 O 40 ], Ag 6 [SiW 10 V 2 O 40 ], Ag 4 [SiW 12 O 40 ] and Ag 3 [PMo 12 O 40 ] and interactions with the antifungal drugs itraconazole (ITC), terbinafine (TBF) and amphotericin B (AMB) on the yeast and mycelia forms of Sporothrix spp. Sporothrix spp. yeast cells were susceptible to Ag-HPA salts at minimum inhibitory concentration (MIC) values ranging from 8 to 128 μg/ml. Interactions between Ag 3 [PW 12 O 40 ] and Ag 3 [PMo 12 O 40 ] with itraconazole and amphotericin B resulted in higher antifungal activity with a reduction in growth and melanization. Treated cells showed changes in cell membrane integrity, vacuolization, cytoplasm disorder, and membrane detachment. Promising antifungal activity for treating sporotrichosis was observed for the Ag-HPA salts Ag 3 [PMo 12 O 40 ] and Ag 3 [PW 12 O 40 ], which have a low cost, high yield and activity at low concentrations. However, further evaluation of in vivo tests is still required.

show abstract

Preparation of conducting polyanilines doped with Keggin-type polyoxometalates and their application as counter electrode in dye-sensitized solar cells

Cited by 38 publications

References 38 publications

Current–voltage characteristics and inhomogeneous barrier height analysis of Au/poly(o-toluidine)/p-Si/Al heterojunction diode

Current–voltage characteristics and inhomogeneous barrier height analysis of Au/poly(o-toluidine)/p-Si/Al heterojunction diode

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Antifungal activity of silver salts of Keggin-type heteropolyacids against Sporothrix spp.

Contact Info

Product

Resources

About