A Novel Amine-Free Dianchoring Organic Dye for Efficient Dye-Sensitized Solar Cells

Ting, Hao‐Chun; Tsai, Chih‐Hung; Chen, Jiahong; Lin, Li‐Yen; Chou, Shu-Hua; Wong, Ken‐Tsung; Huang, Tsung‐Wei; Wu, Chung‐Chih

doi:10.1021/ol303121z

Cited by 57 publications

(18 citation statements)

References 46 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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“…In 1991, Grätzel et al [1] used high-surface-area TiO 2 nanoparticles to develop a novel type of solar cell called the dye-sensitized solar cell (DSSC). Compared with conventional Si-based solar cells and thin-film solar cells, DSSCs are advantageous because of their simple structure, easy fabrication process, and low cost; hence, they promptly attracted the interest of the scientific community [2,3,4,5,6,7,8,9,10]. DSSC devices comprise a transparent conductive glass substrate, TiO 2 nanoparticle thin-film electrode, dye, electrolyte, and Pt counter electrode (CE) [11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Coral-Like Cu2O Nano/Microstructures as Counter Electrodes for Dye-Sensitized Solar Cells

2015

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In this study, a chemical oxidation method was employed to fabricate coral-like Cu2O nano/microstructures on Cu foils as counter electrodes (CEs) for dye-sensitized solar cells (DSSCs). The Cu2O nano/microstructures were prepared at various sintering temperatures (400, 500, 600 and 700 °C) to investigate the influences of the sintering temperature on the DSSC characteristics. First, the Cu foil substrates were immersed in an aqueous solution containing (NH4)2S2O8 and NaOH. After reacting at 25 °C for 30 min, the Cu substrates were converted to Cu(OH)2 nanostructures. Subsequently, the nanostructures were subjected to nitrogen sintering, leading to Cu(OH)2 being dehydrated into CuO, which was then deoxidized to form coral-like Cu2O nano/microstructures. The material properties of the Cu2O CEs were comprehensively determined using a scanning electron microscope, energy dispersive X-ray spectrometer, X-ray diffractometer, Raman spectrometer, X-ray photoelectron spectroscope, and cyclic voltameter. The Cu2O CEs sintered at various temperatures were used in DSSC devices and analyzed according to the current density–voltage characteristics, incident photon-to-current conversion efficiency, and electrochemical impedance characteristics. The Cu2O CEs sintered at 600 °C exhibited the optimal electrode properties and DSSC performance, yielding a power conversion efficiency of 3.62%. The Cu2O CEs fabricated on Cu foil were generally mechanically flexible and could therefore be applied to flexible DSSCs.

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“…Otherwise, 3‐lithio‐2,2′‐bithiophene (without TMS groups) was readily transformed into 5‐lithio‐2,2′‐bithiophene in step iii by lithium exchange, which shuffles the reactive position (Figure S2). In addition, dimerization and trimerization in step iv via the reactive α‐positions was unavoidable in the absence of TMS protecting groups (Figure S2) . By circumventing these undesired reactions, the SFT framework ( 10 ) was efficiently synthesized.…”

Section: Resultsmentioning

confidence: 89%

Stabilization of Charge Carriers in Picket‐Fence Polythiophenes Using Dielectric Side Chains

Zhao

Sakurai

Yoneda

et al. 2016

Chemistry An Asian Journal

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Insulated molecular wires (IMWs) are π-conjugated polymers that are molecularly sheathed with an insulating layer and are structurally analogous to electric power cords at the nanoscale. Such unique architectures are expected in molecular electronics and organic devices. Herein, we propose a new molecular design concept of IMWs, in which the sheaths can be customized, thereby enabling the modulation of the electronic properties of the interior π-conjugated systems. To this end, we focused our attention on the dielectric constant of the sheaths, as it governs the electrostatic interaction between charges. Upon doping, charge carriers, such as polaron and bipolaron, were generated regardless of the dielectric properties of the sheaths. Flash-photolysis time-resolved microwave conductivity measurements revealed that intrawire charge carrier mobility was independent of the sheaths. However, we found that the charge carriers could be stabilized by the sheaths with a high dielectric constant owing to the charge screening effect. We expect that IMWs designed in this way will be useful in a variety of applications, where the nature of charge carriers plays an important role, and particularly when redox switching is required (e.g., electrochromic, magnetic, and memory applications).

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A Novel Amine-Free Dianchoring Organic Dye for Efficient Dye-Sensitized Solar Cells

Cited by 57 publications

References 46 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

Investigation of Coral-Like Cu2O Nano/Microstructures as Counter Electrodes for Dye-Sensitized Solar Cells

Stabilization of Charge Carriers in Picket‐Fence Polythiophenes Using Dielectric Side Chains

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