Outdoor performance of a tandem InGaP/Si photovoltaic luminescent solar concentrator

Phelan, Megan; Needell, David R.; Bauser, Haley; Su, Hanxiao; Deceglie, Michael G.; Theingi, San; Koscher, Brent A.; Nett, Zach; Bukowsky, Colton R.; Ilic, Ognjen; Stradins, Paul; Geisz, John F.; Nuzzo, Ralph G.; Alivisatos, A. Paul; Atwater, Harry A.

doi:10.1016/j.solmat.2020.110945

Cited by 16 publications

(5 citation statements)

References 37 publications

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“…Simulations of the 2D flux gain versus the geometric gain indicated a greater benefit of utilizing the YBNC layer at larger geometric gains. Phelan fabricated a tandem LSC‐solar cell device composed of the following structure from top to bottom: top filter/CdSe LSC/InGaP micro‐cell/bottom filter/Si cell [134] . Despite having many layers that should theoretically have synergized for a maximum PCE of ∼29 %, the fabricated LSC‐PV tandem device exhibited a much lower PCE of 10 %.…”

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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Section: Semiconductor Quantum Dots In Lscsmentioning

confidence: 99%

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

et al. 2021

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“…Over the past several decades, silicon photovoltaics (PVs) have transformed the renewable electricity generation landscape, with worldwide solar installations of >100 GW/year. , Microscale solar cells, − defined as PV devices with a top area of less than 1 mm 2 , are expanding the reach of solar electricity generation beyond applications typified by solar farm and rooftop installations. Applications of PV microcells, as demonstrated in previous studies, include autonomous electrochromic windows, luminescent solar concentrators, − and self-powered sensors . Microscale form factors, when obtained from large wafers and placed in a coplanar fashion, as shown in Scheme , can enable (i) increased module mechanical flexibility; (ii) partial optical transparency via assembly in sparse arrays on transparent substrates; − ,− and (iii) self-powered systems.…”

Section: Introductionmentioning

confidence: 96%

Silicon Heterojunction Microcells

Potter

Phelan

Balaji

et al. 2021

ACS Appl. Mater. Interfaces

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We report the design, fabrication, and characterization of silicon heterojunction microcells, a new type of photovoltaic cell that leverages high-efficiency bulk wafers in a microscale form factor, while also addressing the challenge of passivating microcell sidewalls to mitigate carrier recombination. We present synthesis methods exploiting either dry etching or laser cutting to realize microcells with native oxide-based edge passivation. Measured microcell performance for both fabrication processes is compared to that in simulations. We characterize the dependence of microcell open-circuit voltage (V oc) on the cell area–perimeter ratio and examine synthesis processes that affect edge passivation quality, such as sidewall damage removal, the passivation material, and the deposition technique. We report the highest Si microcell V oc to date (588 mV, for a 400 μm × 400 μm × 80 μm device), demonstrate V oc improvements with deposited edge passivation of up to 55 mV, and outline a pathway to achieve microcell efficiencies surpassing 15% for such device sizes.

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“…Harnessing the plentiful solar energy reaching the earth via photovoltaics will play a major role in satisfying our future energy needs in a sustainable way. One promising approach is concentrated photovoltaics 1 , and several ways to achieve concentration are being used in the field 2 , 3 - Fresnel lenses 4 , 5 , mirrors 6 , 7 , parabolic concentrators 8 , 9 , secondary high-index optics 10 , waveguides 11 – 13 , immersion lenses 14 , surface nanotexturing 15 . The majority of these require active tracking of the Sun as they have to face the light source within a few degrees.…”

Section: Introductionmentioning

confidence: 99%

Immersion graded index optics: theory, design, and prototypes

Vaidya

Solgaard

2022

Microsyst Nanoeng

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Immersion optics enable creation of systems with improved optical concentration and coupling by taking advantage of the fact that the luminance of light is proportional to the square of the refractive index in a lossless optical system. Immersion graded index optical concentrators, that do not need to track the source, are described in terms of theory, simulations, and experiments. We introduce a generalized design guide equation which follows the Pareto function and can be used to create various immersion graded index optics depending on the application requirements of concentration, refractive index, height, and efficiency. We present glass and polymer fabrication techniques for creating broadband transparent graded index materials with large refractive index ranges, (refractive index ratio)2 of ~2, going many fold beyond what is seen in nature or the optics industry. The prototypes demonstrate 3x optical concentration with over 90% efficiency. We report via functional prototypes that graded-index-lens concentrators perform close to the theoretical maximum limit and we introduce simple, inexpensive, design-flexible, and scalable fabrication techniques for their implementation.

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Outdoor performance of a tandem InGaP/Si photovoltaic luminescent solar concentrator

Cited by 16 publications

References 37 publications

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

Silicon Heterojunction Microcells

Immersion graded index optics: theory, design, and prototypes

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