Broadband efficiency enhancement in quantum dot solar cells coupled with multispiked plasmonic nanostars

Wu, Jiang; Yu, Peng; Susha, Andrei S.; Sablon, Kimberly; Chen, Haiyuan; Zhou, Zhi‐Hua; Li, Handong; Ji, Haining; Niu, Xiaobin; Govorov, Alexander O.; Rogach, Andrey L.; Wang, Zhiming M.

doi:10.1016/j.nanoen.2015.02.012

Cited by 74 publications

(50 citation statements)

References 34 publications

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“…Enhancement of exciton dissociation by plasmonic nanoparticles has recently been reported for HgTe quantum dot photodiodes 27 and different types of solar cells. 11,28À32 This may also be the case for the present system. In either event, the optimization of the NC amount resulted in the improvement of the PCE from 4.45% (without Ag NCs) to 6.03% by 1.36 times.…”

Section: Articlesupporting

confidence: 55%

Efficiency Enhancement of PbS Quantum Dot/ZnO Nanowire Bulk-Heterojunction Solar Cells by Plasmonic Silver Nanocubes

et al. 2015

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For improvement of solar cell performance, it is important to make efficient use of near-infrared light, which accounts for ∼40% of sunlight energy. Here we introduce plasmonic Ag nanocubes (NCs) to colloidal PbS quantum dot/ZnO nanowire (PbS QD/ZnO NW) bulk-heterojunction solar cells, which are characterized by high photocurrents, for further improvement in the photocurrent and power conversion efficiency (PCE) in the visible and near-infrared regions. The Ag NCs exhibit strong far field scattering and intense optical near field in the wavelength region where light absorption of PbS QDs is relatively weak. Photocurrents of the solar cells are enhanced by the Ag NCs particularly in the range 700-1200 nm because of plasmonic enhancement of light absorption and possible facilitation of exciton dissociation. As a result of the optimization of the position and amount of Ag NCs, the PCE of PbS QD/ZnO NW bulk-heterojunction solar cells is improved from 4.45% to 6.03% by 1.36 times.

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Section: Articlesupporting

confidence: 55%

Efficiency Enhancement of PbS Quantum Dot/ZnO Nanowire Bulk-Heterojunction Solar Cells by Plasmonic Silver Nanocubes

et al. 2015

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“…Although the insertion of strain-compensation layers between QDs can alleviate the strain accumulation, the strain balance technique requires precise control in growth and imposes constrains on design flexibility. So far, researches on QDSCs are focusing on enhancing optical absorption in QDs, including optimization of the QD growth, improving solar cell structures, and engineering light trapping techniques [13,14]. Among these efforts, droplet epitaxy (DE) growth technique shows its advantages on the fabrication of strain-free QDs [15,16].…”

Section: Introductionmentioning

confidence: 99%

InGaAs and GaAs quantum dot solar cells grown by droplet epitaxy

Gao

et al. 2017

Solar Energy Materials and Solar Cells

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Traditional p-i-n junction solar cells imbedded with quantum dots are attractive to achieve chromatic light absorption enhancement. In this paper, multi-layer stacked GaAs and In 0.1 Ga 0.9 As quantum dots grown by the droplet epitaxy technique are sandwiched between Al 0.4 Ga 0.6 As layers for solar energy harvesting. The performance of GaAs and InGaAs quantum dot solar cells is compared using structural, optical, and electrical measurements. Two-step photon absorption process is studied via adding external infrared pumping sources in quantum efficiency measurements at room temperature. This work demonstrates that strain-free nanostructures by droplet epitaxy are promising for photovoltaic application.

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“…More precisely, they support collective oscillations of the free electrons, a phenomenon known as localized surface plasmon resonance (LSPR), with applications in several fields [1–5]. Some of those applications, like medical diagnostics [6], immunoassays [7, 8], and studies of living cells and bacteria [9, 10], require a fine control over the spectral properties (i.e., position and width) of the LSPR, which are susceptible to parameters like the size, shape, structure, and composition of the particles [11], along with the nature of dispersing dielectric medium.…”

Section: Introductionmentioning

confidence: 99%

Near- and Far-Field Optical Response of Eccentric Nanoshells

et al. 2017

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We study the optical response of eccentric nanoshells (i.e., spherical nanoparticles with an eccentric spherical inclusion) in the near and the far field through finite-difference time-domain simulations. Plasmon hybridization theory is used to explain the obtained results. The eccentricity generates a far-field optical spectrum with various plasmon peaks. The number, position, and width of the peaks depend on the core offset. Near-field enhancements in the surroundings of these structures are significantly larger than those obtained for equivalent concentric nanoshells and, more importantly, they are almost independent of the illumination conditions. This opens up the door for using eccentric nanoshells in applications requiring intense near-field enhancements.

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Broadband efficiency enhancement in quantum dot solar cells coupled with multispiked plasmonic nanostars

Cited by 74 publications

References 34 publications

Efficiency Enhancement of PbS Quantum Dot/ZnO Nanowire Bulk-Heterojunction Solar Cells by Plasmonic Silver Nanocubes

Efficiency Enhancement of PbS Quantum Dot/ZnO Nanowire Bulk-Heterojunction Solar Cells by Plasmonic Silver Nanocubes

InGaAs and GaAs quantum dot solar cells grown by droplet epitaxy

Near- and Far-Field Optical Response of Eccentric Nanoshells

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