Enhanced conversion efficiency in Si solar cells employing photoluminescent down-shifting CdSe/CdS core/shell quantum dots

Lopez-Delgado, R.; Zhou, Yufeng; Zazueta-Raynaud, A.; Zhao, Haiguang; Pelayo, J. E.; Vomiero, Alberto; Álvarez, E.; Rosei, Federico; Ayón, Arturo A.

doi:10.1038/s41598-017-14269-0

Cited by 47 publications

(26 citation statements)

References 38 publications

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“…This cascade is only possible with the configuration of CdS as the QD nucleus (core) and CdSe as the shell. Nevertheless, the configuration CdSe/CdS has been proved to have a high performance in QDSSCs when coated with a ZnS layer (Yu et al, 2012) and also can improve the absorption range of silicon cells (Lopez-Delgado et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Biological Synthesis of CdS/CdSe Core/Shell Nanoparticles and Its Application in Quantum Dot Sensitized Solar Cells

Órdenes-Aenishanslins

Anziani‐Ostuni

Quezada

et al. 2019

Front. Microbiol.

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In the present work, we report the use of bacterial cells for the production of CdS/CdSe Core/Shell quantum dots (QDs), a complex nanostructure specially designed to improve their performance as photosensitizer in photovoltaic devices. The method requires the incorporation of L-cysteine, CdCl 2 and Na 2 SeO 3 to Escherichia coli cultures and allows a tight control of QDs properties. The obtained CdS/CdSe QDs were photophysically and structurally characterized. When compared to CdS QDs, the classical shift in the UV-visible spectra of Core/Shell nanostructures was observed in CdS/CdSe QDs. The nanosize, structure, and composition of Core/Shell QDs were confirmed by TEM and EDS analysis. QDs presented a size of approximately 12 nm (CdS) and 17 nm (CdS/CdSe) as determined by dynamic light scattering (DLS), whereas the fourier transform infrared (FTIR) spectra allowed to distinguish the presence of different biomolecules bound to both types of nanoparticles. An increased photostability was observed in CdS/CdSe nanoparticles when compared to CdS QDs. Finally, biosynthesized CdS/CdSe Core/Shell QDs were used as photosensitizers for quantum dots sensitized solar cells (QDSSCs) and their photovoltaic parameters determined. As expected, the efficiency of solar cells sensitized with biological CdS/CdSe QDs increased almost 2.5 times when compared to cells sensitized with CdS QDs. This work is the first report of biological synthesis of CdS/CdSe Core/Shell QDs using bacterial cells and represents a significant contribution to the development of green and low-cost photovoltaic technologies.

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Section: Introductionmentioning

confidence: 99%

Biological Synthesis of CdS/CdSe Core/Shell Nanoparticles and Its Application in Quantum Dot Sensitized Solar Cells

Órdenes-Aenishanslins

Anziani‐Ostuni

Quezada

et al. 2019

Front. Microbiol.

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“…The precise control over the absorption range and stoke shift of core/shell QDs are of particular interest for their application as energy‐down‐shift (EDS) layer to boost the performance of silicon (Si) solar cells. From last few years, considerable efforts have been devoted to implementing the core/shell QDs based EDS layer over the Si solar cells to harvest more efficiently the UV photons, which enhances the PCE and reduces the cost of photovoltaic electricity generation 145–152. For example, Park and co‐workers synthesized the type‐I CdSe/ZnS core/shell QDs and spin coated on the textured p‐type Si solar cell with SiN x film 145.…”

Section: Hybrid Solar Cellsmentioning

confidence: 99%

“…Recently, Rosei and co‐workers applied especially designed “giant” CdSe/CdS core/shell QDs based EDS layer over the Si solar cells, yielding the PCE of 13.5%, which is 13% higher than the Si solar cells without EDS layer 146. Although the implementing of the EDS layer based on core/shell QDs is a promising approach to boost the performance of the Si solar cells.…”

Section: Hybrid Solar Cellsmentioning

confidence: 99%

Core/Shell Quantum Dots Solar Cells

Selopal

Zhao

Wang

et al. 2020

Adv Funct Materials

116

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Semiconductor nanocrystals, the so-called quantum dots (QDs), exhibit versatile optical and electrical properties. However, QDs possess high density of surface defects/traps due to the high surface-to-volume ratio, which act as nonradiative carrier recombination centers within the QDs, thereby deteriorating the overall solar cell performance. The surface passivation of QDs through the growth of an outer shell of different materials/compositions called "core/shell QDs" has proven to be an effective approach to reduce the surface defects and confinement potential, which can enable the broadening of the absorption spectrum, accelerate the carrier transfer, and reduce exciton recombination loss. Here, the recent research developments in the tailoring of the structure of core/shell QDs to tune exciton dynamics so as to improve solar cell performance are summarized. The role of band alignment of core and shell materials, core size, shell thickness/compositions, and interface engineering of core/thick shell called "giant" QDs on electron-hole spatial separation, carrier transport, and confinement potential, before and after grafting on the carrier scavengers (semiconductor/electrolyte), is described. Then, the solar cell performance based on core/shell QDs is introduced. Finally, an outlook for the rational design of core/shell QDs is provided, which can further promote the development of high-efficiency and stable QD sensitized solar cells.

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“…Lopez‐Delgado et al. studied the CdSe/CdS core/shell QDs for LSC applications [154] . A layer of CdSe/CdS core/shell QDs was deposited on the window side of a PV to absorb UV light and re‐emit ∼625 nm red light.…”

Section: Semiconductor Quantum Dots In Lscsmentioning

confidence: 99%

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

et al. 2021

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Luminescent solar concentrators (LSCs) have recently gained popularity as an effective solution to increase solar energy conversion. Utilizing LSCs together with solar cells can generate more energy at a lower cost than using only solar cells. LSCs operate by utilizing luminophores, molecules that absorb incident solar irradiation and re‐emit photons, and waveguides that redirect emitted photons to the edges of a glass or polymer slab at high concentrations. Many quantum dots (QDs) have been the focus of much research as luminophores for LSCs, owing to their high quantum yields (QYs), controllable absorption/emission spectra, good stability, and ease of synthesis. Various QDs, such as CdSe, PbS, CdS, AgInS2, Si, and C, have been modified to enhance their optical performances in LSCs, often measured by their optical efficiencies, internal/external quantum efficiencies, and power conversion efficiencies. This review appraises the latest developments in colloidal QDs—basic QDs, doped QDs, core/shell QDs, hybrid QDs, and Si‐based QD—for their applications in LSCs. Other factors that enhance an LSC's efficiency, such as altering the polymer matrix and using distributed Bragg reflectors, are discussed. The development of highly efficient, QD‐based LSCs will be essential for increasing solar energy production worldwide.

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Enhanced conversion efficiency in Si solar cells employing photoluminescent down-shifting CdSe/CdS core/shell quantum dots

Cited by 47 publications

References 38 publications

Biological Synthesis of CdS/CdSe Core/Shell Nanoparticles and Its Application in Quantum Dot Sensitized Solar Cells

Biological Synthesis of CdS/CdSe Core/Shell Nanoparticles and Its Application in Quantum Dot Sensitized Solar Cells

Core/Shell Quantum Dots Solar Cells

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

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