Blue-Coloured Highly Efficient Dye-Sensitized Solar Cells by Implementing the Diketopyrrolopyrrole Chromophore

Yum, Jun‐Ho; Holcombe, Thomas W.; Kim, Yongjoo; Rakštys, Kasparas; Moehl, Thomas; Teuscher, Joël; Delcamp, Jared H.; Nazeeruddin, M. K.; Grätzel, Michaël

doi:10.1038/srep02446

Cited by 155 publications

(128 citation statements)

References 48 publications

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“…For DNF01, the decrease of R rec is probably due to dye aggregation on Nb 2 O 5 (see Table 6). Indeed, the intermolecular energy transfer may decrease the electron injection [20]. This hypothesis makes the high ∆G inj * value less relevant for DNF01 (see Table 1).…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 98%

“…To the best of our knowledge, none of the previous researches in the literature presents the optimization of the sensitizers for DSSCs relying on Nb 2 O 5 photoanodes. The dyes were chosen among both metal-complex dyes (two Ru-based dyes, N749 and C106, and one Zn-based dye, DNF12) [17][18][19] and metal-free organic dyes (DNF01, DNF11 and DNF15) [20][21][22]. Sensitizers were chosen in such a way to cover a broad range of light absorption (from 440 nm to 960 nm), obviously taking into account the necessity of the redox potential of the electrolyte active species (I − /I 3 − ) and the conduction band edge of the semiconductor to be, energetically, into the dye's absorption gap.…”

Section: Introductionmentioning

confidence: 99%

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Test of Different Sensitizing Dyes in Dye-Sensitized Solar Cells Based on Nb2O5 Photoanodes

Latini

Panetta

2018

Energies

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High-performance dyes routinely employed in TiO 2 -based dye-sensitized solar cells (DSSCs) were tested in cells assembled using Nb 2 O 5 nanostructure-based photoanodes. The sensitizers were chosen among both metal-complex (two Ru-based, N749 and C106, and one Zn-based dye, DNF12) and metal-free organic dyes (DNF01, DNF11 and DNF15). Two different sensitization processes were performed: the one commonly used for TiO 2 photoanodes, and a new process relying on high pressure by autoclavation. The assembled cells were characterized by current density-voltage (J-V) curves under air mass (AM) 1.5 G illumination and in the dark, incident photon-to-current efficiency (IPCE) measurements, and electrochemical impedance spectroscopy. The tested cells show different proportional efficiencies of the dyes under investigation for Nb 2 O 5 -and TiO 2 -based devices. Furthermore, the results were compared with those obtained in our previous work using N719 anchored on Nb 2 O 5 . A remarkable efficiency value of 4.4% under 1 sun illumination was achieved by coupling the C106 dye with a nonvolatile electrolyte. This value is higher than the one attained under the same conditions by using N719.

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Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Test of Different Sensitizing Dyes in Dye-Sensitized Solar Cells Based on Nb2O5 Photoanodes

Latini

Panetta

2018

Energies

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“…Specifically, these type of compounds can act as strong acceptor units, exhibit high fluorescence quantum yields, and possess exceptional thermal and photostability, making them excellent building blocks for many applications such as organic electronics, [1][2][3] solid state lasers, 4,5 dye-sensitized solar cells, 6,7 dyes [8][9][10] and fluorescent probes. 11 The DPP unit has a well-conjugated structure with a strong π-π interaction and electron-withdrawing effect, which results in efficient charge transport.…”

Section: Introductionmentioning

confidence: 99%

Exciplex Enhancement as a Tool to Increase OLED Device Efficiency

et al. 2016

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(2016) 'Exciplex enhancement as a tool to increase OLED device e ciency.', Journal of physical chemistry C., 120 (4). pp. 2070-2078. Further information on publisher's website:https://doi.org/10.1021/acs.jpcc.5b11263 Publisher's copyright statement: This document is the Accepted Manuscript version of a Published Work that appeared in nal form in Journal of physical chemistry C, copyright c American Chemical Society after peer review and technical editing by the publisher. To access the nal edited and published work see https://doi.org/10.1021/acs.jpcc.5b11263Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. derivatives that could be used as emitters in OLED devices. We were able to improve the of efficiency DPP materials by forming exciplex enhanced OLED devices. These organic materials were also characterized by electrochemical and spectroscopic methods in order to elucidate each molecule's interaction and decreasing the photoluminescence efficiency.2

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“…Much of the research has targeted the improvement of new and efficient photosensitizers, including sensitizers like ruthenium complexes [13][14][15], zinc porphyrins [16][17][18] as well as metal-free organic dyes [19][20][21][22]. Rutheniumbased sensitizers such as the N3 dye/ N719 dye [9,10,23] and black dye [24] were rigorously tested as light har-vesters and reached remarkable overall power conversion efficiency (η) in the range of 11% under Air Mass 1.5 (AM 1.5) irradiation while organic photosensitizers have reached power conversion efficiency (PCE) in the range of 5-8% [25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photovoltaic Performance via Co-sensitization of Ruthenium (II)-Based Complex Sensitizers with Metal-Free Indoline Dye in Dye-Sensitized Solar Cells

Sahu¹,

Patel²,

Verma³

et al. 2017

Organic Photonics and Photovoltaics

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Co-sensitization is shown to be an effective method to improve the efficiency of dye-sensitized solar cells wherein ruthenium (ii)-based complex sensitizers (N749, N719) is co-sensitized with the metal-free indoline dye (D149), where photovoltaic efficiency of 5.40% is achieved by co-sensitized N749+D149 and efficiency of 4.94% is achieved by co-sensitized N719+D149. The assembled dye-sensitized solar cells were studied by UVvis absorption measurements of dye solutions, the absorption spectra of the dye-sensitized TiO 2 film along with co-sensitized TiO 2 film and current-voltage characteristics. The co-sensitized based device exhibits better photovoltaic performance compared to the devices fabricated from individual sensitizers. Upon optimization, the device made of co-sensitized N749+D149 yielded Jsc = 13.6 mA/cm 2 , Voc = 690 mV, FF = 0.576 and η = 5.40% and the device made of co-sensitized N719+D149 yielded Jsc = 13.3 mA/cm 2 , Voc = 660 mV, FF = 0.563 and η = 4.94%. This demonstrated that the performance of co-sensitized devices is improved from that of the devices sensitized with either N749 (4.56%), N719 (4.24%) or D149 (4.06%) under the same fabrication conditions.

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Blue-Coloured Highly Efficient Dye-Sensitized Solar Cells by Implementing the Diketopyrrolopyrrole Chromophore

Cited by 155 publications

References 48 publications

Test of Different Sensitizing Dyes in Dye-Sensitized Solar Cells Based on Nb2O5 Photoanodes

Test of Different Sensitizing Dyes in Dye-Sensitized Solar Cells Based on Nb2O5 Photoanodes

Exciplex Enhancement as a Tool to Increase OLED Device Efficiency

Enhanced Photovoltaic Performance via Co-sensitization of Ruthenium (II)-Based Complex Sensitizers with Metal-Free Indoline Dye in Dye-Sensitized Solar Cells

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