Porphyrins as excellent dyes for dye-sensitized solar cells: recent developments and insights

Higashino, Tomohiro; Imahori, Hiroshi

doi:10.1039/c4dt02756f

Cited by 541 publications

(350 citation statements)

References 102 publications

(143 reference statements)

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“…These intrinsic properties have made them two of the most popular families of organic dyes, particularly in the frame of photovoltaics. [35][36][37][38][39][40][41][42][43][44] However, their use for the modulation of the optoelectronic properties of TMDC-based devices has not been yet described. Considering this, we decided to investigate the effects of the noncovalent functionalization of MoS2 photodetectors with the soluble PDI and tetraphenyl porphyrin (TPP) depicted in Chart 1.…”

Section: Introductionmentioning

confidence: 99%

Engineering the optoelectronic properties of MoS₂ photodetectors through reversible noncovalent functionalization

et al. 2016

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We present an easy drop-casting based functionalization of MoS2-based photodetectors that results in an enhancement of the photoresponse of about four orders of magnitude, reaching responsivities up to 100 A·W -1 . The functionalization is technologically trivial, air-stable, fully reversible and reproducible, and opens the door to the combination of 2D-materials with molecular dyes for the development of high performance photodetectors.Among the novel two-dimensional (2D) materials, 1-8 transition metal dichalcogenides (TMDCs) [9][10][11][12] show particularly promising electronic and optoelectronic properties. 13 In particular, their intrinsic bandgap within the visible part of the spectrum, makes them highly interesting materials for optoelectronic applications.14 In fact, the presence of a bandgap has allowed for the construction of a wealth of prototype electronic devices based on TMDCs. [15][16][17][18][19][20][21][22][23][24] In the last years, there has been a significant effort to modulate the optical properties of TMDCs in order to optimize the performance of the corresponding devices. Most of the strategies investigated so far rely on physical methods, such as strain-engineering, 25,26 fieldeffect doping, 12,27 or artificial stacking of different 2D materials. 28,29 In comparison, the chemical modification of TMDCs is still rather underexplored, despite the appealing combination of low-cost and high degree of control offered by synthetic chemistry. Examples of doping of TMDCs through surface charge-transfer using metal atoms, 30 gases, 31 and a few organic molecules has already been demonstrated. 32,33 Responsivities of just a few A·W -1 have been reported for MoS2 photodetectors functionalized with a rhodamine dye, 34 a rather modest value for MoS2-based photodetectors. Among the readily available organic dyes, perylenediimides (PDIs) and porphyrins show remarkable optical properties, including large molar absorptivity -ca. 10 5 M −1 cm −1 for PDIs and 10 6 M −1 cm −1 for porphyrins-, and outstanding photostability under ambient conditions. These intrinsic properties have made them two of the most popular families of organic dyes, particularly in the frame of photovoltaics. [35][36][37][38][39][40][41][42][43][44] However, their use for the modulation of the optoelectronic properties of TMDC-based devices has not been yet described. Considering this, we decided to investigate the effects of the noncovalent functionalization of MoS2 This is the post-peer reviewed version of the following article: A.J. Molina-Mendoza et al. "Engineering the optoelectronic properties of MoS2 photodetectors through reversible noncovalent functionalization" Chem. Comm., 2016 DOI: 10.1039/C6CC07678E Which has been published in final form at: http://pubs.rsc.org/en/content/articlelanding/2016/cc/c6cc07678e#!divAbstract photodetectors with the soluble PDI and tetraphenyl porphyrin (TPP) depicted in Chart 1. Here, we describe that the supramolecular functionalization of mechanically exfoliated MoS2-based photodetector...

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Section: Introductionmentioning

confidence: 99%

Engineering the optoelectronic properties of MoS₂ photodetectors through reversible noncovalent functionalization

et al. 2016

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“…In this type of solar cell the properties of the dye, such as colour, molecular extinction coeffi-cient and robustness under illumination, are of utmost importance. Among the examples of dyes published in the literature [3] for Gratzel€ solar cells, porphyrins [4] have pleasant colours [5], excel-lent molecular extinction coefficients [6,7] and good robustness [8,9]. Moreover, based on the work of Yella and co-workers [1], efficiencies that surpass the values obtained with ruthenium sen-sitizers have been achieved.…”

Section: Introductionmentioning

confidence: 98%

Charge recombination losses in thiophene-substituted porphyrin dye-sensitized solar cells

et al. 2016

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a b s t r a c tTwo new porphyrins that incorporate thiophene substituents as spacers between the conjugated porphyrin core and the anchoring cyanoacrylate group have been synthesised. The two dyes differ in the number of thiophene bridges; porphyrin 1a has only one thiophene group and porphyrin 1b has two thiophene rings connected by a double bond. The measured light-toenergy conversion efficiencies in 1a and 1b were assessed using two different electrolytes, LP1 and LP2, which differ in the presence of tert-butyl pyridine in LP1. An efficiency of 6% under standard measurement conditions has been achieved for 1a þ LP1. However, for porphyrin 1b the use of electrolyte LP1 led to lower efficiencies and a value of approximately 4% was obtained. The differences between the two types of solar cells and the electrolytes have been studied in-depth using photoinduced time-resolved techniques such as CE (Charge Extrac-tion) and TPV (Transient PhotoVoltage).

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“…However, the scarcity, high cost, and toxicity of ruthenium metal limit the widespread use of such sensitizers in DSSCs. In addition, the zinc porphyrin dye is more than 12% efficient in Co II /Co III electrolytes under standard conditions, which is considered to be a very promising sensitizer [14,15]. In recent years, perovskite solar cells have become another potential photovoltaic approach with efficiency of over 20% under AM1.5G light sources and dim light irradiation [16,17].…”

Section: Introductionmentioning

confidence: 99%

Computational Prediction of Electronic and Photovoltaic Properties of Anthracene-Based Organic Dyes for Dye-Sensitized Solar Cells

Wang

Liu

et al. 2018

International Journal of Photoenergy

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Three kinds of anthracene-based organic dyes for dye-sensitized solar cells (DSSCs) were studied, and their structures are based on a push-pull framework with anthracenyl diphenylamine as the donor connected to a carboxyphenyl or carboxyphenylbromothiazole (BTZ) as the acceptor via an acetylene bridge. The photoelectric properties of the three dyes were investigated using density functional theory (DFT). The simulations indicate that the improvement of anthracene-based dyes (the addition of BTZ and the change of alkyl groups to alkoxy chains) can reduce the energy gap and produce a red shift. This structural modification also improves the light capturing and the electron injection capability, making it excellent in photoelectric conversion efficiency (PCE). In addition, twelve molecules have been designed to regulate photovoltaic performance.

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Porphyrins as excellent dyes for dye-sensitized solar cells: recent developments and insights

Cited by 541 publications

References 102 publications

Engineering the optoelectronic properties of MoS₂ photodetectors through reversible noncovalent functionalization

Engineering the optoelectronic properties of MoS₂ photodetectors through reversible noncovalent functionalization

Charge recombination losses in thiophene-substituted porphyrin dye-sensitized solar cells

Computational Prediction of Electronic and Photovoltaic Properties of Anthracene-Based Organic Dyes for Dye-Sensitized Solar Cells

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