Record efficient upconverter solar cell devices with optimized bifacial silicon solar cells and monocrystalline BaY2F8:30% Er3+ upconverter

Fischer, Stefan; Favilla, E.; Tonelli, M.; Goldschmidt, Jan Christoph

doi:10.1016/j.solmat.2014.12.023

Cited by 103 publications

(88 citation statements)

References 29 publications

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“…8, local contact structure was used, the front and back surfaces of the cell were made planar, the front and back antireflection layers were optimized to transmit the sub-bandgap photons to the bottom upconverter materials and to decrease the back surface reflection of the light emitted by upconverter materials around 980 nm [63]. Fischer et al placed BaY 2 F 8 and NaYF 4 upconverter materials to the bottom of the bifacial illuminated cell under concentration, these materials absorbed the light around 1500 nm and emitted the light around 980 nm, the short circuit current of the cell increased 17.273.0 mA/cm 2 under 94 717 suns using BaY 2 F 8 upconverter materials [64], and it increased 13.1 mA/cm 2 under 210 suns using NaYF 4 upconverter materials [39]. Above cells were made by CMOS-like semiconductor process or industrial crystalline silicon solar cell manufacturing process, the PN junctions of above cells were mainly made by diffusion, the front surface was covered by passivation and antireflection layer, and the grids were made by evaporation, plating or screen printing technology.…”

Section: Front and Back Contact Cellmentioning

confidence: 99%

A review of concentrator silicon solar cells

Xing

Han

Wang

et al. 2015

Renewable and Sustainable Energy Reviews

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Section: Front and Back Contact Cellmentioning

confidence: 99%

A review of concentrator silicon solar cells

Xing

Han

Wang

et al. 2015

Renewable and Sustainable Energy Reviews

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“…[3][4][5] The photovoltaic performance of ultrathin silicon solar cell is, however, inherently limited by incomplete absorption of longer wavelength photons near its bandgap. In particular, spectral upconversion, a concept proposed for addressing the sub-bandgap transparency of solar cells, [14][15][16][17][18][19][20][21] is an attractive approach that provides an additional pathway to enhance the quantum effi ciency of above-bandgap longer wavelength photons by converting them into high energy photons that can be more strongly absorbed by the ultrathin silicon. In particular, spectral upconversion, a concept proposed for addressing the sub-bandgap transparency of solar cells, [14][15][16][17][18][19][20][21] is an attractive approach that provides an additional pathway to enhance the quantum effi ciency of above-bandgap longer wavelength photons by converting them into high energy photons that can be more strongly absorbed by the ultrathin silicon.…”

mentioning

confidence: 99%

High‐Performance Flexible Nanostructured Silicon Solar Modules with Plasmonically Engineered Upconversion Medium

Lee

Dhar

et al. 2015

Advanced Energy Materials

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optoelectronics. [ 1,2 ] Advantages including reduced materials consumption, relaxed requirements of materials purity, and ability to form large-area devices on unlimited classes of module substrates make them particularly useful as building blocks for realizing high-effi ciency, low-cost photovoltaic systems. [3][4][5] The photovoltaic performance of ultrathin silicon solar cell is, however, inherently limited by incomplete absorption of longer wavelength photons near its bandgap. [ 6,7 ] While light trapping methods based on various diffractive and/ or refl ective optical elements can greatly help to improve the absorption of optically thin silicon, [8][9][10][11][12][13] complementary means to additionally capitalize on such low energy photons are desirable to further improve the performance of ultrathin silicon solar cells. In particular, spectral upconversion, a concept proposed for addressing the sub-bandgap transparency of solar cells, [14][15][16][17][18][19][20][21] is an attractive approach that provides an additional pathway to enhance the quantum effi ciency of above-bandgap longer wavelength photons by converting them into high energy photons that can be more strongly absorbed by the ultrathin silicon. One of key challenges for the practical application of spectral upconversion in photovoltaics (PVs), however, is that the intensity of natural sunlight in relevant wavelengths (i.e., near-infrared) is often too weak to yield meaningful effects of upconversion. [22][23][24] In this regard, recent advances in light manipulation using metallic nanostructures, A type of composite photovoltaic system that can improve the absorption of longer wavelength photons for ultrathin silicon solar cells is presented by synergistically exploiting spectral upconversion and plasmonic light manipulation under a reconfi gurable platform where individual module components can be independently optimized and strategically combined by printing-based deterministic materials assemblies. The ultrathin (≈8 µm) nanostructured silicon solar cells are embedded in a thin polymeric medium containingNaYF 4 :Yb 3+ ,Er 3+ nanocrystals, coated on a plasmonically engineered substrate that incorporates hybrid nanostructures of cylindrical nanoholes and truncated-cone-shaped nanoposts. Both excitation and emission processes of upconversion luminophores are signifi cantly enhanced by combined effects of surface plasmon resonance to amplify the light intensity at the excitation wavelength as well as to facilitate the far-fi eld outcoupling at the emission wavelengths, respectively. The performance of the integrated solar module is improved by ≈13% compared to devices on a nanostructured plasmonic substrate without luminophores due to collective contributions from plasmonically enhanced spectral upconversion, together with effects of waveguiding and fl uorescence of NaYF 4 :Yb 3+ ,Er 3+ . Detailed studies on optical properties of engineered plasmonic nanostructures and device performance in both experiments and numerical modeling provide quanti...

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“…86 It was estimated that this number represented 62% of the theoretical result, assuming perfect optical coupling into the solar cell from the upconvertor. In other words, using PQ 4 PdNA sensitizer and 88 Goldschmidt and co-workers report ζ = 3.7 × 10 −3 mA cm 2 ⊙ −2 at 19 suns but note that this measurement is not in the quadratic regime, and thus, they expect that under one sun, a value twice as large would be measured.…”

Section: The Journal Of Physical Chemistry Lettersmentioning

confidence: 94%

Beyond Shockley–Queisser: Molecular Approaches to High-Efficiency Photovoltaics

Tayebjee

McCamey

Schmidt

2015

J. Phys. Chem. Lett.

170

174

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Molecular materials afford abundant flexibility in the tunability of physical and electronic properties. As such, they are ideally suited to engineering low-cost, flexible, light-harvesting materials that break away from the single-threshold paradigm. Single-threshold solar cells are capable of harvesting a maximum of 33.7% of incident sunlight, whereas two-threshold cells are capable of energy harvesting efficiencies exceeding 45%. In this Perspective, we provide the theoretical background with which upper efficiency limits for various multiple-threshold solar cell architectures may be calculated and review and discuss various reports that employ processes such as triplet-triplet annihilation and singlet fission in multiple-threshold devices comprised of molecular materials.

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Record efficient upconverter solar cell devices with optimized bifacial silicon solar cells and monocrystalline BaY2F8:30% Er3+ upconverter

Cited by 103 publications

References 29 publications

A review of concentrator silicon solar cells

A review of concentrator silicon solar cells

High‐Performance Flexible Nanostructured Silicon Solar Modules with Plasmonically Engineered Upconversion Medium

Beyond Shockley–Queisser: Molecular Approaches to High-Efficiency Photovoltaics

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