The Molecular Engineering of Organic Sensitizers for Solar‐Cell Applications

This review presents an overview of the dedicated research directions of the Group for Molecular Engineering of Functional Materials (GMF). This includes molecular engineering aspects of sensitizers constructed from ruthenium complexes, organic molecules, porphyrins and phthalocyanines. Manipulation of organometal trihalide perovskites, and charge transporting materials for high performance perovskite solar cells and photo-detectors are also described. Controlling phosphorescence color, and quantum yields in iridium complexes by tailoring ligands for organic light emitting diodes are demonstrated. Efficient reduction of CO(2) to CO using molecular catalyst on a protected Cu(2)O photocathode, and cost-effective water-splitting cell using a high efficiency perovskite solar cell are presented.

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“…[11] The Ullazine core possesses a number of activated sites for the molecular engineering of Ullazine-based derivatives (Fig. 6).…”

Section: Metal-free Organic Sensitizersmentioning

confidence: 99%

Molecular Engineering of Functional Materials for Energy and Opto-Electronic Applications

Gao

Domanski

Aghazada

et al. 2015

Chimia

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“…The utility of electron-deficient BTD-functionalized anchor significantly broadens the Soret and Q-band absorbance of porphyrins, yields impressively high light harvesting across the whole visible wavelength range, resulting in an improved J SC . 3 Additionally, another way to improve the sensitizer's light harvesting property is to adjust dye's absorption in the near-IR range of solar irradiance, for example, by replacing dye's donor with stronger electron attributors such as ullazine group 22 , or by employing electron rich π-linkers [30][31] . Jiao et al designed a series of donor-π-acceptor dyes (Y1 and derivatives, see Fig.…”

Section: Manipulation Of Interface Adsorption Structuresmentioning

confidence: 99%

Dye-sensitized solar cells: Atomic scale investigation of interface structure and dynamics

Ma¹,

Zhang²,

Meng³

2014

Chinese Phys. B

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Dye-sensitized solar cells (DSC), built upon organic/inorganic hybrid materials, are possibly the most promising third generation solar cells, which attract wide attentions due to their low-cost, flexibility and environment-friendly properties. We review recent progresses in DSC research, focusing on atomic-scale investigations of the interface electronic structures and dynamical processes, including dye adsorption structure onto TiO 2 , ultrafast electron injection, hot-electron injection, multiple-exciton generation and electron-hole recombination. We briefly summarize advanced experimental techniques and theoretical approaches investigating these interface electronic properties and dynamics, and then introduce progressive achievements in the photovoltaic device optimization based on insights obtained from atomic scale investigations. Finally, some challenges and opportunities for further improvement of dye solar cells are presented.

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“…[22][23][24][25] In this molecular framework, two strategies have been commonly deployed to improve the performance of ss-DSSCd evices. The first strategy is to modify the donor site, [26][27][28] because the electronic and steric traits of the electron-donating moiety play ap ivotalr ole in determining the energy levels of the dye molecules adsorbed on the surface of titania nanocrystals. [29] Several donor groups,s uch as triphenylamine (TPA), indoline, carbazole, and cumarine, have been utilized for this purpose.…”

Section: Introductionmentioning

confidence: 99%

Molecular Engineering of Organic Dyes with a Hole‐Extending Donor Tail for Efficient All‐Solid‐State Dye‐Sensitized Solar Cells

Chang

Cheng

et al. 2015

ChemSusChem

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We report a new concept for the design of metal-free organic dyes (OD5-OD9) with an extended donor-π-acceptor (D-π-A) molecular framework, in which the donor terminal unit is attached by a hole-extending side chain to retard back electron transfer and charge recombination; the π-bridge component contains varied thiophene-based substituents to enhance the light-harvesting ability of the device. The best dye (OD9) has a D-A-π-A configuration with the hexyloxyphenylthiophene (HPT) side chain as a hole-extension component and a benzothiadiazole (BTD) internal acceptor as a π-extension component. The co-sensitization of OD9 with the new porphyrin dye LW24 enhanced the light-harvesting ability to 800 nm; thus, a power conversion efficiency 5.5 % was achieved. Photoinduced absorption (PIA) and transient absorption spectral (TAS) techniques were applied to account for the observed trend of the open-circuit voltage (VOC ) of the devices. This work provides insights into the molecular design, photovoltaic performance, and kinetics of charge recombination.

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The Molecular Engineering of Organic Sensitizers for Solar‐Cell Applications

Cited by 157 publications

References 37 publications

Molecular Engineering of Functional Materials for Energy and Opto-Electronic Applications

Molecular Engineering of Functional Materials for Energy and Opto-Electronic Applications

Dye-sensitized solar cells: Atomic scale investigation of interface structure and dynamics

Molecular Engineering of Organic Dyes with a Hole‐Extending Donor Tail for Efficient All‐Solid‐State Dye‐Sensitized Solar Cells

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