Quantum dots for Luminescent Solar Concentrators

Purcell-Milton, Finn; Gun’ko, Yurii K.

doi:10.1039/c2jm32366d

Cited by 180 publications

(127 citation statements)

References 218 publications

(231 reference statements)

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“…These deficiencies reduce the light-harvesting efficiency of LSCs and also lead to strong colouring of devices, which imposes certain constraints on their use in architecture. Colloidal or nanocrystal quantum dots can help overcome these limitations [10][11][12][13][14] . They feature near-unity photoluminescence quantum yields (Φ PL ) and narrow, widely tunable emission spectra that can be matched to various solar cells including both singleand multi-junction devices.…”

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confidence: 99%

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

et al. 2015

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Luminescent solar concentrators serving as semitransparent photovoltaic windows could become an important element in net zero energy consumption buildings of the future. Colloidal quantum dots are promising materials for luminescent solar concentrators as they can be engineered to provide the large Stokes shift necessary for suppressing reabsorption losses in large-area devices. Existing Stokes-shift-engineered quantum dots allow for only partial coverage of the solar spectrum, which limits their light-harvesting ability and leads to colouring of the luminescent solar concentrators, complicating their use in architecture. Here, we use quantum dots of ternary I-III-VI2 semiconductors to realize the first large-area quantum dot-luminescent solar concentrators free of toxic elements, with reduced reabsorption and extended coverage of the solar spectrum. By incorporating CuInSexS2-x quantum dots into photo-polymerized poly(lauryl methacrylate), we obtain freestanding, colourless slabs that introduce no distortion to perceived colours and are thus well suited for the realization of photovoltaic windows. Thanks to the suppressed reabsorption and high emission efficiencies of the quantum dots, we achieve an optical power efficiency of 3.2%. Ultrafast spectroscopy studies suggest that the Stokes-shifted emission involves a conduction-band electron and a hole residing in an intragap state associated with a native defect.

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confidence: 99%

Highly efficient large-area colourless luminescent solar concentrators using heavy-metal-free colloidal quantum dots

et al. 2015

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“…One beneficial approach toward decreasing PV costs is to use solar concentrator systems to harvest more solar radiation over the limited area of a solar cell. Among the various types of PV concentrators, luminescent solar concentrators (LSCs) [2][3][4][5][6][7][8] have received renewed interest because they can harvest solar radiation without the need for expensive tacking systems. Typical LSCs feature a planar waveguide in which dye molecules are dispersed to enhance the light absorption ability.…”

Section: Introductionmentioning

confidence: 99%

Flexible luminescent waveguiding photovoltaics exhibiting strong scattering effects from the dye aggregation

Chou

Hsu²,

Chen

2015

Nano Energy

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“…[10][11][12][13][14] Specially, PbSe QDs have attracted much attention in the solar cell field with respect to their small band gap (0.27 eV at 300K), large exciton Bohr radius 46 nm [1] and multiple exciton generation (MEG). [6,15] PbSe QDs films as the active layer of solar cells can produce very large currents by the process of MEG and resulted in a power conversion efficiencies of more than 4% due to the photocurrent enhancement [14].…”

Section: Introductionmentioning

confidence: 99%