Photoisomerization of the cyanoacrylic acid acceptor group – a potential problem for organic dyes in solar cells

Zietz, Burkhard; Gabrielsson, Erik; Johansson, Viktor; El‐Zohry, Ahmed M.; Sun, Licheng; Kloo, Lars

doi:10.1039/c3cp54048k

Cited by 57 publications

(76 citation statements)

References 15 publications

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“…The for the D35 dye in solution is much shorter (∼0.2 ns) than for D35+C-Zr NPs [13], possibly because excited state photoisomerization (which would quench fluorescence) is suppressed when dye molecules are attached to a surface. Comparable lifetime enhancements have been observed for similar organic dyes attached to surfaces [31,33,34].…”

Section: D35 Dye-sensitized Zirconia Nanoparticlesmentioning

confidence: 59%

Does the triphenylamine-based D35 dye sensitizer form aggregates on metal-oxide surfaces?

Dryza

Bieske

2015

Journal of Photochemistry and Photobiology A: Chemistry

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Section: D35 Dye-sensitized Zirconia Nanoparticlesmentioning

confidence: 59%

Does the triphenylamine-based D35 dye sensitizer form aggregates on metal-oxide surfaces?

Dryza

Bieske

2015

Journal of Photochemistry and Photobiology A: Chemistry

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“…Photoisomerization is a class of photochemical reactions of great importance in many biological systems, 91,92 and is also relevant for an extensive range of technological applications such as memories, switches, actuators, or solar cells. [93][94][95] We study a simplified model molecule that can represent a wide range of photoisomerization reactions, such as cis-trans reactions in stilbene, azobenzene or rhodopsin (rotations around C=C or N=N bonds), with an electronic structure depicted in Fig. 2c.…”

Section: Single-molecule Polaritonic Chemistrymentioning

confidence: 99%

Polaritonic Chemistry with Organic Molecules

2017

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Esta es la versión de autor del artículo publicado en: This is an author produced version of a paper published in:El acceso a la versión del editor puede requerir la suscripción del recurso Access to the published version may require subscription AbstractWe present an overview of the general concepts of polaritonic chemistry with organic molecules, i.e., the manipulation of chemical structure that can be achieved through strong coupling between confined light modes and organic molecules. Strong coupling and the associated formation of polaritons, hybrid light-matter excitations, leads to energy shifts in such systems that can amount to a large fraction of the uncoupled transition energy. This has recently been shown to significantly alter the chemical structure of the coupled molecules, which opens the possibility to manipulate and control reactions. We discuss the current state of theory for describing these changes and present several applications, with a particular focus on the collective effects observed when many molecules are involved in strong coupling.Keywords polaritonic chemistry, photochemistry, organic molecules, quantum optics 1 When the coherent energy exchange between a confined light mode and a quantum emitter becomes faster than the decay and decoherence of either constituent, the system enters into the regime of strong coupling or vacuum Rabi splitting. 1,2 The fundamental excitations of the system are then polaritons, hybrid light-matter excitations. This requires a large (collective)where N is the number of involved emitters, µ is their transition dipole moment, and E 1ph ∝ V −1/2 is the electric field strength associated with one photon in the light mode (with V its effective mode volume). The figure of merit for a material is thus its dipole density µ 2 N/V , with organic materials presenting a particularly favorable case due to their large dipole moments and high possible density. In addition, the large binding energies of Frenkel excitons in organic materials make them stable at room-temperature. This has allowed reaching the strong-coupling regime with a large variety of electromagnetic (EM) modes, 3 such as cavity photons, 4-8 surface plasmon polaritons, [9][10][11][12] surface lattice resonances, 13,14 and localized surface plasmons. 15,16 Typical Rabi frequencies range from ≈ 100 meV to more than 1 eV, a significant fraction of the uncoupled transition energy, for a wide range of organic materials such as dye molecules, J-aggregates, and even carbon nanotubes. 17,18 By using localized surface plasmon modes with extreme-subwavelength light confinement, recent experiments have achieved strong coupling at room temperature even down to the single-emitter level. [19][20][21] The mixed light-matter character of organic polaritons enables a large number of interesting applications (see Ref. 22 for a recent review discussing polaritonic devices, including a comparison between organic and inorganic materials), such as polariton lasing and/or Bose-Einstein condensation 23-25 including nonlinear ...

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“…

Photoisomerization, i.e., a change of molecular structure after absorption of a photon, is one of the most fundamental photochemical processes. It can perform desirable functionality, e.g., as the primary photochemical event in human vision, where it stores electronic energy in the molecular structure [1,2], or for possible applications in solar energy storage [3] and as memories, switches, and actuators [4,5]; but it can also have detrimental effects, for example as an important damage pathway under solar irradiation of DNA [6,7], or as a limiting factor for the efficiency of organic solar cells [8]. While photoisomerization can be avoided by shielding the system from light, this is of course not a viable pathway for approaches that rely on the interaction with external light (such as solar cells or solar energy storage).

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mentioning

confidence: 99%

Suppressing photochemical reactions with quantized light fields

2016

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Photoisomerization, that is, a photochemical reaction leading to a change of molecular structure after absorption of a photon, can have detrimental effects such as leading to DNA damage under solar irradiation, or as a limiting factor for the efficiency of solar cells. Here, we show that strong coupling of organic molecules to a confined light mode can be used to strongly suppress photoisomerization, as well as other photochemical reactions, and thus convert molecules that normally show fast photodegradation into photostable forms. We find this to be especially efficient in the case of collective strong coupling, where the distribution of a single excitation over many molecules and the light mode leads to a collective protection effect that almost completely suppresses the photochemical reaction.

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Photoisomerization of the cyanoacrylic acid acceptor group – a potential problem for organic dyes in solar cells

Cited by 57 publications

References 15 publications

Does the triphenylamine-based D35 dye sensitizer form aggregates on metal-oxide surfaces?

Does the triphenylamine-based D35 dye sensitizer form aggregates on metal-oxide surfaces?

Polaritonic Chemistry with Organic Molecules

Suppressing photochemical reactions with quantized light fields

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