Light concentration in polymer bulk heterojunction solar cells with plasmonic nanoparticles

Zhu, Jinfeng; Zhang, Baoqing; Kim, Richard S.; Zhe, WU

doi:10.1117/12.914545

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…It is noted that even for the P 3 HT/PC 60 BM blend the dielectric constant from the experiments is in the range of 3.4–4. , We think that the different dielectric constant might come from the different aggregation. In the present calculations, therefore, we use the up-limit of dielectric constants from the experiments to mimic the aggregation effect of blends (3.9 is from the blend of PCPDTBT/PC 70 BM). All the calculations are implemented with the PCM in the Gaussian 09 program…”

Section: Structures and Electronic Properties Of Pcpdtbt And Fulleren...mentioning

confidence: 99%

Theoretical Prediction of the Rate Constants for Exciton Dissociation and Charge Recombination to a Triplet State in PCPDTBT with Different Fullerene Derivatives

Leng

Qin

et al. 2014

J. Phys. Chem. C

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The exciton dissociations and charge recombinations to a triplet state in the donor−acceptor heterojunction solar cells of [2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta-[2,1-b;3,4-b]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) blended with ten different fullerene derivatives are theoretically investigated by using electronic structure calculations together with a Marcus formula. The detailed discussions of available accuracy in the evaluation of all quantities entering the rate expression (driving force, electronic coupling, and internal and external reorganization energies) are provided. The results reveal that the exciton dissociations in most blends are barrierless reactions because the corresponding values of driving forces and reorganization energies are very close; however, the recombinations from the charge transfer states to the triplet state of PCPDTBT occur in the Marcus normal regime. The predicted rates for both the exciton dissociation and charge recombination are in quite good agreement with experimental measurements. In addition, as the triplet charge transfer states are formed, their recombination rates become two orders larger than those for the singlet ones and have orders similar to the exciton dissociations. It is thus expected that the triplet charge recombinations are dominant channels, whereas the singlet charge recombinations can be safely neglected because of quite small rates compared to exciton dissociation ones.

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Section: Structures and Electronic Properties Of Pcpdtbt And Fulleren...mentioning

confidence: 99%

Theoretical Prediction of the Rate Constants for Exciton Dissociation and Charge Recombination to a Triplet State in PCPDTBT with Different Fullerene Derivatives

Leng

Qin

et al. 2014

J. Phys. Chem. C

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Organic tandem solar cells under indoor light illumination

Biswas

You

Vincent

et al. 2020

Progress in Photovoltaics

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The lifetime of a device depends highly on that of its battery. In order to enhance the longevity of microsystems or sensor networks, it is necessary for these devices to be self‐powered. Indoor photovoltaics allow the possibility of harvesting artificial light sources for powering microsystems. Whereas indoor photovoltaics based on single active layers have showed high efficiencies under LED lighting, tandem structures have yet to be tested extensively. In our study, we use finite‐difference time‐domain simulations to study the highest possible short‐circuit current density that can be extracted from tandem organic devices. We compare the simulation results to the results for photovoltaic devices based on single bulk active layer heterojunctions. Our simulations found that although detailed balanced band gap calculations show tandem photovoltaics to be viable, the low‐intensity emission spectra of white LED light sources can be better harvested by single active layer‐based photovoltaics. The current‐matching limitation of a tandem photovoltaic structure connected in series limits the highest output current and open‐circuit voltage of the device and, thus, its performance for the illumination of lower intensity light.

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Light concentration in polymer bulk heterojunction solar cells with plasmonic nanoparticles

Cited by 2 publications

References 10 publications

Theoretical Prediction of the Rate Constants for Exciton Dissociation and Charge Recombination to a Triplet State in PCPDTBT with Different Fullerene Derivatives

Theoretical Prediction of the Rate Constants for Exciton Dissociation and Charge Recombination to a Triplet State in PCPDTBT with Different Fullerene Derivatives

Organic tandem solar cells under indoor light illumination

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