Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system

Zhao, Shun‐Cai; Chen, Jingyi

doi:10.1088/1367-2630/ab473a

Cited by 13 publications

(9 citation statements)

References 32 publications

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“…The nonlinear influence on the quantum yields has also presented in a different quantum photocell model. [24] Figure 2 manifests the nontrivial passive role of the RRR χ in the quantum yields in this quantum photocell.…”

Section: Resultsmentioning

confidence: 92%

“…and the voltage of the photocell can written, with respect to the energy levels and populations, as [15,24,25] eV…”

Section: The Photocell Model With Two Electron Donorsmentioning

confidence: 99%

“…The photoelectron conversion efficiency [1][2][3][4] is a continuous concern about solar cells or photovoltaic devices. When research of the photoelectric conversion efficiency encounters the bottleneck, [5][6][7][8][9][10][11][12][13][14] scientists turn their interesting to quantum technology, [15][16][17][18][19][20][21][22][23][24][25] and they hoped to break through the efficiency limitation, and further to improve the photoelectric conversion efficiency by means of quantum mechanics.…”

Section: Introductionmentioning

confidence: 99%

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Inhibiting radiative recombination rate to enhance quantum yields in a quantum photocell*

Chen¹,

Zhao²

2020

Chinese Phys. B

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Inhibiting the radiative radiation is an efficient approach to enhance quantum yields in a solar sell. This work carries out the inhibition of radiative recombination rate (RRR) in a quantum photocell with two coupled donors. We perform explicit calculations of the transition rates, energy gaps and the absorbed solar wavelength-dependent RRR, and find that two different regimes play the crucial roles in inhibiting RRR. One is the quantum coherence generated from two different transition channels, the other includes the absorbed photon wavelength and gaps between the donor and acceptor in this proposed photocell model. The results imply that there may be some efficient ways to enhance the photoelectron conversion compared to the classic solar cell.

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Section: Resultsmentioning

confidence: 92%

“…and the voltage of the photocell can written, with respect to the energy levels and populations, as [15,24,25] eV…”

Section: The Photocell Model With Two Electron Donorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inhibiting radiative recombination rate to enhance quantum yields in a quantum photocell*

Chen¹,

Zhao²

2020

Chinese Phys. B

Self Cite

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“…[12,13] People firmly believe that understanding its underlying mechanism involving photosynthesis can help us design novel artificial nanodevices for efficient quantum transport and some optimized solar cells. [14][15][16][17][18] Recently, some theoretical models [19][20][21] show that quantum mechanical behavior contributes to the high efficiency of biological processes.…”

Section: Introductionmentioning

confidence: 99%

Influence of the coupled-dipoles on photosynthetic performance in a photosynthetic quantum heat engine*

Li¹,

Zhao²

2021

Chinese Phys. B

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Recent evidence suggests that the multiple charge-separation pathways can contribute to photosynthetic performance. In this work, the influence of coupled-dipoles on photosynthetic performance was investigated in a two-charge separation pathways quantum heat engine (QHE) model. And the population dynamics of the two coupled sites, j–V characteristics, and power involving this photosynthetic QHE model were evaluated for the photosynthetic performance. The results illustrate that the photosynthetic performance can be greatly enhanced but quantum interference is deactivated by the coupled-dipoles between the two-charge separation pathways. However, the photosynthetic performance can also be promoted by the deactivated quantum interference owing to the coupled-dipoles. It is a novel role of the coupled-dipoles in the energy transport process of biological photosynthetic, and some artificial strategies may be motivated by this photosynthetic QHE model in the future.

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“…Em [92] e mostrado que a coerência quântica induzida por ruído pode parar o balanço detalhado e produzir lasers sem inversão de população e/ou com maior eficiência. Embora estes resultados tenham gerado muito debate [93], várias tentativas foram feitas para melhorar o desempenho de dispositivos fotovoltaicos, dando origem a algumas variantes deste modelo [94,95,96,97].…”

Section: Fotocélulaunclassified

Aplicações da dinâmica de portadores de cargas em semicondutores como sistemas quânticos abertos

Santos¹

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O comportamento dinâmico dos sistemas quânticos abertos desempenha um papel fundamental em muitas aplicações da mecânica quântica. Exemplos de aplicações incluem problemas como a perda de coerência quântica induzida pelo meio, a relaxação em sistemas de muitos corpos, o transporte quântico, a química quântica, a informação quântica, dentre outros. Em estreita analogia com um processo estocástico markoviano clássico, a interação de um sistema quântico aberto com um ambiente ruidosoé muitas vezes modelada, fenomenologicamente, por meio de um superoperador gerador independente do tempo na forma de Lindblad, que descreve tipicamente uma dinâmica de perda irreversível de características quânticas. Aqui, particularmente, estamos interessados em sistemas onde portadores de carga em dispositivos semicondutores estão acoplados a um ambiente térmico ruidoso. Neste contexto, apresentamos nossos estudos de dois problemas: as caraterísticas da conversão fotovoltaica de uma molécula de pontos quânticos acoplada com um reservatório fonônico, sob a ação de radiação térmica, e a formação de estados quânticos de luz em nanocavidades acopladas com pontos quânticos. No segundo problema investigamos a transição quânticoclássico em estados de superposição mesoscópicas do campo no interior da nanocavidade e posteriormente exploramos a ação de uma engenharia de ambiente sobre tais estados.

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Enhanced quantum yields and efficiency in a quantum dot photocell modeled by a multi-level system

Cited by 13 publications

References 32 publications

Inhibiting radiative recombination rate to enhance quantum yields in a quantum photocell*

Inhibiting radiative recombination rate to enhance quantum yields in a quantum photocell*

Influence of the coupled-dipoles on photosynthetic performance in a photosynthetic quantum heat engine*

Aplicações da dinâmica de portadores de cargas em semicondutores como sistemas quânticos abertos

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