High-Efficiency Förster Resonance Energy Transfer in Solid-State Dye Sensitized Solar Cells

Mor, Gopal K.; Basham, James I.; Paulose, Maggie; Kim, Sang-Hoon; Varghese, Oomman K.; Vaish, Amit; Yoriya, Sorachon; Grimes, Craig A.

doi:10.1021/nl100415q

Cited by 116 publications

(82 citation statements)

References 49 publications

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“…The concept of ET from sensitizers such as colloidal semiconductor quantum dots [22][23][24] , dye molecules [25][26][27][28] or silicon NCs 29-31 is widely used. It can, for example, improve the spectral response of photovoltaic devices, increase the output of phosphors or optical amplifiers or be used for colour tuning in lighting.…”

Section: Discussionmentioning

confidence: 99%

Photonic effects on the Förster resonance energy transfer efficiency

et al. 2014

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Förster resonance energy transfer (ET) between luminescent species is applied in bioimaging, lighting and photovoltaics, and has an important role in photosynthesis. However, the fundamental question of whether ET rates and efficiencies can be tuned by the photonic environment remains under debate. Here we show that ET rates are independent of the photonic environment, using the model system of LaPO 4 nanocrystals co-doped with Ce 3 þ donors and Tb 3 þ acceptors. Although the radiative emission rate of the Ce 3 þ excited state increases with the refractive index of the solvent in which the nanocrystals are dispersed, the Ce 3 þ -to-Tb 3 þ ET rate does not. We demonstrate that, as a result, lower refractive index solvents enable higher ET efficiencies leading to higher Tb 3 þ emission intensities. Furthermore, an analytical model for ET in (nano)crystalline host materials is presented, able to predict the dependence of ET efficiencies on the photonic environment and the concentration of acceptor ions.

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Section: Discussionmentioning

confidence: 99%

Photonic effects on the Förster resonance energy transfer efficiency

et al. 2014

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“…A similar sensitization concept has only recently proven to be benefi cial for dye sensitized and hybrid solar cells. [23][24][25][26][27] For OPV devices theoretical and experimental sensitization studies have been reported using special dyes and acceptor molecules. [28][29][30][31][32] Charge and energy transfer mechanisms involving fullerenes have been discussed in the past and remain a hotly debated topic.…”

Section: Perylene Sensitization Of Fullerenes For Improved Performancmentioning

confidence: 99%

Perylene Sensitization of Fullerenes for Improved Performance in Organic Photovoltaics

Hesse

Weickert

Hundschell

et al. 2011

Advanced Energy Materials

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We present the addition of an energy relay dye to fullerenes resulting in increased light harvesting and significantly improved power conversion efficiency for organic photovoltaic (OPV) devices. Although exhibiting excellent properties as electron acceptors, visible light absorption of fullerenes is limited. Strongly light absorbing donor materials are needed for efficient light harvesting in the thin active layer of OPV devices. Therefore, photocurrent generation and thus power conversion efficiency of this type of solar cell is confined by the overlap of the relatively narrow absorption band of commonly used donor molecules with the solar spectrum. Herein the concept of fullerene dye sensitization is presented, which allows increased light harvesting on the electron acceptor side of the heterojunction. The concept is exemplarily shown for an UV absorbing small molecule and a near infrared absorbing polymer, namely hexa‐peri‐hexabenzocoronene (HBC) and Poly[2,1,3‐benzothiadiazole‐4,7‐diyl[4,4‐bis(2‐ethylhexyl)‐4H‐cyclopenta[2,1‐b:3,4‐b']dithiophene‐2,6‐diyl]] (PCPDTBT), respectively. In both systems remarkably higher power conversion efficiency is achieved via perylene sensitization of the fullerene acceptor. Steady state photoluminescence, transient absorption and transient photocurrent decay studies reveal pathways of the additionally generated excited states at the sensitizer molecule. The findings suggest fluorescence resonance energy transfer from the photo‐excited dye to the fullerene enabling decoupling of light absorption and charge transport. The presented sensitization method is proposed as a viable new concept for performance enhancement in organic photovoltaic devices.

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“…[5] But it is also widely used when considering EET between semiconducting nanocrystals and molecules attached to their surface as well as among different nanocrystals. [6,7] Potential application in photovoltaics [8][9][10] has focused current research interests on EET in specifically arranged supramolecular complexes which should act as artificial light-harvesting antennae.…”

Section: Introductionmentioning

confidence: 99%

A Mixed Quantum–Classical Description of Excitation Energy Transfer in Supramolecular Complexes: Förster Theory and beyond

et al. 2011

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Electronic excitation energy transfer (EET) is described theoretically for the chromophore complex P(4) formed by a butanediamine dendrimer to which four pheophorbide-a molecules are covalently linked. To achieve a description with atomic resolution, and to account for the effect of an ethanol solvent, a mixed quantum-classical methodology is utilized. Room-temperature molecular dynamics simulations are used to describe the nuclear dynamics, and EET is accounted for in utilizing a mixed quantum-classical formulation of the transition rates. Therefore, the full quantum expression of the EET rates is given and the change to a mixed quantum-classical version is briefly explained. The description results in the calculation of transition rates which coincide rather satisfactory with available experimental data on P(4). It is also shown that different assumptions of classical Förster theory are not valid for P(4). The temporal behavior of EET deduced from the rate equations is confronted with that following from the solution of the time-dependent Schrödinger equation entering the mixed quantum-classical description of EET. From this we can conclude that EET in flexible chromophore complexes such as P(4) can be rather satisfactory estimated by single transition rates. A correct description, however, is only achievable by using a sufficiently large set of rates that correspond to the various possible equilibrium configurations of the complex.

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High-Efficiency Förster Resonance Energy Transfer in Solid-State Dye Sensitized Solar Cells

Cited by 116 publications

References 49 publications

Photonic effects on the Förster resonance energy transfer efficiency

Photonic effects on the Förster resonance energy transfer efficiency

Perylene Sensitization of Fullerenes for Improved Performance in Organic Photovoltaics

A Mixed Quantum–Classical Description of Excitation Energy Transfer in Supramolecular Complexes: Förster Theory and beyond

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