Dual-channel anchorable organic dyes with well-defined structures for highly efficient dye-sensitized solar cells

Seo, Kang Deuk; You, Ban Seok; Choi, In Tack; Ju, Myung Jong; You, Mi; Kang, Hong Seok; Kim, Hwan Kyu

doi:10.1039/c3ta11832k

Cited by 51 publications

(24 citation statements)

References 32 publications

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“…[19,20] To date, many research efforts have been dedicated to constructing diverse organic dyes, an overwhelming majority of which employed the conventional cyanoacrylic acid (CA) as the electron acceptor. [21][22][23][24][25][26][27] Recently,4 -(benzo[c] [1,2,5]thiadiazol-4-ylethynyl)benzoic acid (BTEBA), as ap romising electron acceptor,w as coupled with strongly electron-donatings egmentsf or the dyes C281, WEF1, and WEF2 (see the Supporting Information, Figure S1), accompaniedb yahigh power conversion efficiency. [27,28] Because of its strong electron withdrawing character, BTEBA could lower the energy level of the lowest unoccupied molecularo rbital Am etal-free organic sensitizer,s uitable for the applicationi n dye-sensitized solar cells (DSSCs), has been designed, synthesized and characterized both experimentally and theoretically.…”

Section: Introductionmentioning

confidence: 99%

Molecular Design of Efficient Organic D–A––A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells

et al. 2018

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A metal-free organic sensitizer, suitable for the application in dye-sensitized solar cells (DSSCs), has been designed, synthesized and characterized both experimentally and theoretically. The structure of the novel donor-acceptor-π-bridge-acceptor (D-A-π-A) dye incorporates a triphenylamine (TPA) segment and 4-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)benzoic acid (BTEBA). The triphenylamine unit is widely used as an electron donor for photosensitizers, owing to its nonplanar molecular configuration and excellent electron-donating capability, whereas 4-(benzo[c][1,2,5]thiadiazol-4-ylethynyl)benzoic acid is used as an electron acceptor unit. The influences of I /I , [Co(bpy) ] and [Cu(tmby) ] (tmby=4,4',6,6'-tetramethyl-2,2'-bipyridine) as redox electrolytes on the DSSC device performance were also investigated. The maximal monochromatic incident photon-to-current conversion efficiency (IPCE) reached 81 % and the solar light to electrical energy conversion efficiency of devices with [Cu(tmby) ] reached 7.15 %. The devices with [Co(bpy) ] and I /I electrolytes gave efficiencies of 5.22 % and 6.14 %, respectively. The lowest device performance with a [Co(bpy) ] -based electrolyte is attributed to increased charge recombination.

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Section: Introductionmentioning

confidence: 99%

Molecular Design of Efficient Organic D–A––A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells

et al. 2018

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“…Table 2 summarizes the values for τ e and R ct for all the three devices. As per literature, the larger value of R ct is leads to the reduction in charge recombination rate which is favorable towards the enhancement in device efficiency [44]. The highest current density value is observed for ZrO 2 -based DSSCs which is may be due to the highest value of electron life time (τ e ) compared to other two devices.…”

Section: Photovoltaic Studymentioning

confidence: 67%

Layer-by-layer deposition of TiO2–ZrO2 electrode sensitized with Pandan leaves: natural dye-sensitized solar cell

Pawar

Baviskar

Inamuddin

et al. 2019

Mater Renew Sustain Energy

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TiO 2 , ZrO 2 and layer-by-layer TiO 2-ZrO 2 films were prepared by doctor blade method followed by sensitization with natural dye for dye-sensitized solar cell application. The structural and optical, morphological and compositional properties were investigated by X-ray diffraction and UV-Vis spectroscopy, scanning electron microscopy, BET, surface profilometer and energy-dispersive X-ray analyzer, respectively. Dye-sensitized solar cells were fabricated using the prepared electrodes of TiO 2 , ZrO 2 and layer-by-layer TiO 2-ZrO 2 films sensitized with natural dye extracted from Pandan leaves (Pandanus amaryllifolius). The J-V characteristics were recorded to measure photo-response of fabricated devices and electrochemical impedance spectroscopy to study the electron behavior, series resistance and lifetime. Photovoltaic parameter like shortcircuit current, open-circuit voltage, fill factor, and power conversion efficiency were evaluated for fabricated solar cell under artificial light supplied from white LED (15 mW·cm −2). The average values of power conversion efficiency of DSSCs fabricated with TiO 2 , ZrO 2 and layer-by-layer TiO 2-ZrO 2 photoanodes were found to be 0.65%, 3.04% and 3.13%, respectively.

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“…Perhaps, this is due to the competitive adsorption of the co‐sensitizer as well as N3 molecules and thereby, resulting in a decrease in the adsorption of N3 molecules on TiO 2 surface. Further, the improvement in the V OC of co‐sensitized DSSCs fabricated with 0.2 mM of dye N,N‐PABA along with 0.3 mM of N3 can be attributed to the effective adsorption of co‐sensitizer along with Ru‐II based N3 molecules on the surface of TiO 2 , resulting in suppression of the unwanted back reaction in the cell . While, the observed decrease in V OC values in other co‐sensitized devices are mainly attributed to unwanted back reaction that arises within the cell.…”

Section: Resultsmentioning

confidence: 99%

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

et al. 2018

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In this work, we report a comprehensive photovoltaic investigation of a structurally simple Donor‐Acceptor (D−A) configured organic dye, N,N‐PABA as an active co‐sensitizer in DSSCs sensitized with well‐known Ru (II) based N3 dye. This effective co‐sensitizer (N,N‐PABA) comprises N,N‐dimethylaniline system as a donor scaffold linked with 4‐aminobenzoic acid as an electron withdrawing functionality. In the present study, we have demonstrated the profound effect of concentration of sensitizer, i. e. N3 based dye as well as co‐sensitizer, i. e. N,N‐PABA on the photovoltaic performance characteristics of solar cells. Interestingly, the best photovoltaic performance was obtained for the co‐sensitized device fabricated using 0.2 mM of N,N‐PABA along with 0.3 mM of N3 sensitizer, in presence of 20 mM of CDCA. It displayed power conversion efficiency (PCE) of 5.82% with JSC of 14.35 mA.cm−2, VOC of 0.626 V and FF of 64.85%. Here, the N,N‐PABA effectively filled the absorption valley, avoided the dye aggregation and reduced the charge recombination in the co‐sensitized devices. Thus, the results ameliorate the role of efficient co‐sensitizers to yield DSSC with improved performance by the selection of a matchable co‐sensitizer at an appropriate concentration.

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Dual-channel anchorable organic dyes with well-defined structures for highly efficient dye-sensitized solar cells

Cited by 51 publications

References 32 publications

Molecular Design of Efficient Organic D–A––A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells

Molecular Design of Efficient Organic D–A––A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells

Layer-by-layer deposition of TiO2–ZrO2 electrode sensitized with Pandan leaves: natural dye-sensitized solar cell

An Efficient Aniline‐Based Co‐Sensitizer for High Performance N3‐Sensitized Solar Cells

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