Plasmonically enhanced hot electron based photovoltaic device

Atar, Fatih Bilge; Battal, Enes; Aygün, Levent E.; Daglar, Bihter; Bayındır, Mehmet; Okyay, Ali Kemal

doi:10.1364/oe.21.007196

Cited by 62 publications

(61 citation statements)

References 15 publications

(19 reference statements)

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“…[11][12][13][14][15][16][17][18] These hot electrons were utilized in various applications such as photocatalytic water splitting, [19][20][21][22][23][24][25][26] dissociation of H 2 molecules 7,8 and photovoltaic devices. 11,13,[27][28][29][30] In this study, we showed that hot electrons can be generated in Mn-doped quantum dots via efficient 'upconversion' of the energy of two excitons into a hot charge carriers with excess energy stored in the electron, showing the enhanced photocatalytic activity in H 2 production reaction. Such upconversion can be possible due to the very long lifetime (τ Mn~6 ms) of Mn excited state sensitized via rapid exciton-Mn energy transfer, which can serve as a long-lived intermediate state for the sequential two-step process leading to the generation of hot electrons.…”

Section: Introductionmentioning

confidence: 75%

Hot Electrons Generated from Doped Quantum Dots via Upconversion of Excitons to Hot Charge Carriers for Enhanced Photocatalysis

et al. 2015

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We show that hot electrons exhibiting the enhanced photocatalytic activity in H2 production reaction can be efficiently generated in Mn-doped quantum dots via the "upconversion" of the energy of two excitons into the hot charge carriers. The sequential two-photon-induced process with the long-lived Mn excited state serving as the intermediate state is considered as the pathway generating hot electrons. H2 production rate from doped quantum dots is significantly higher than that from undoped quantum dots and also exhibited the quadratic increase with the light intensity, demonstrating the effectiveness of the hot electrons produced in doped quantum dots in photocatalytic reaction. Due to the very long lifetime of Mn excited state (∼6 ms) in the doped quantum dots, the sequential two-photon excitation requires relatively low excitation rates readily achievable with a moderately concentrated solar radiation, demonstrating their potential as an efficient source of hot electrons operating at low excitation intensities.

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Section: Introductionmentioning

confidence: 75%

Hot Electrons Generated from Doped Quantum Dots via Upconversion of Excitons to Hot Charge Carriers for Enhanced Photocatalysis

et al. 2015

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“…This work predicted an optimized efficiency of 2.7% under AM 1.5 G illumination. The asymmetric hot electron generation in the top and bottom contacts can also be realized by creating LSPRs in one of the contacts [103,105,114,115]. It has been shown that asymmetric hot electron generation and enhancement of hot electron emission in Au-Al 2 O 3 -Au MIM diodes can be realized by reshaping the top metallic film contact into stripes [103] (Figure 3D an LSPR under TM illumination; therefore, the incoming light is mostly absorbed in the top contact.…”

Section: Free-space Photodetectorsmentioning

confidence: 99%

Harvesting the loss: surface plasmon-based hot electron photodetection

2016

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Abstract:Although the nonradiative decay of surface plasmons was once thought to be only a parasitic process within the plasmonic and metamaterial communities, hot carriers generated from nonradiative plasmon decay offer new opportunities for harnessing absorption loss. Hot carriers can be harnessed for applications ranging from chemical catalysis, photothermal heating, photovoltaics, and photodetection. Here, we present a review on the recent developments concerning photodetection based on hot electrons. The basic principles and recent progress on hot electron photodetectors are summarized. The challenges and potential future directions are also discussed.

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“…1 Due to the unique property, SPs can find applications in a broad range of science and technology, such as nonlinear optics, 2,3 nanoscale imaging, 4 photodetectors, 1,5-10 metamaterials, 11,12 photocatalysis, 13,14 photovoltaic devices, [15][16][17][18] and novel therapies. 19 Recently, a kind of compact metalinsulator-metal (MIM) photodetectors based on the SPsinduced hot electrons was proposed and fabricated.…”

Section: Introductionmentioning

confidence: 99%

Surface-plasmon enhanced photodetection at communication band based on hot electrons

Zhan

et al. 2015

Journal of Applied Physics

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Surface plasmons can squeeze light into a deep-subwavelength space and generate abundant hot electrons in the nearby metallic regions, enabling a new paradigm of photoconversion by the way of hot electron collection. Unlike the visible spectral range concerned in previous literatures, we focus on the communication band and design the infrared hot-electron photodetectors with plasmonic metal-insulator-metal configuration by using full-wave finite-element method. Titanium dioxide-silver Schottky interface is employed to boost the low-energy infrared photodetection. The photodetection sensitivity is strongly improved by enhancing the plasmonic excitation from a rationally engineered metallic grating, which enables a strong unidirectional photocurrent. With a five-step electrical simulation, the optimized device exhibits an unbiased responsivity of ∼0.1 mA/W and an ultra-narrow response band (FWHM = 4.66 meV), which promises to be a candidate as the compact photodetector operating in communication band.

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Plasmonically enhanced hot electron based photovoltaic device

Cited by 62 publications

References 15 publications

Hot Electrons Generated from Doped Quantum Dots via Upconversion of Excitons to Hot Charge Carriers for Enhanced Photocatalysis

Hot Electrons Generated from Doped Quantum Dots via Upconversion of Excitons to Hot Charge Carriers for Enhanced Photocatalysis

Harvesting the loss: surface plasmon-based hot electron photodetection

Surface-plasmon enhanced photodetection at communication band based on hot electrons

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