N-doped carbon-dots for luminescent solar concentrators

Li, Yunxia; Miao, Peng; Zhou, Wei; Gong, Xiao; Zhao, Xiujian

doi:10.1039/c7ta05220k

Cited by 165 publications

(135 citation statements)

References 34 publications

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“…A very thin layer of PS/NC toluene solution was spin‐coated (or drop‐casted) on a glass substrate (4 mm in thickness) with thickness of 300 µm ( Figure a, top) . The absorption of the thin‐film LSC can be well controlled by varying the concentration of perovskite NCs (C 0 to 4C 0 ).…”

Section: Resultsmentioning

confidence: 99%

“…Typically, an LSC consists of an optical waveguide (polymer or glass of high refractive index) embedded with highly emissive fluorophores, for example, dyes, polymers, quantum dots (QDs), carbon dots (C‐dots), upconversion nanocrystals (NCs) . Upon sunlight illumination, fluorophores absorb the light and re‐emit photons which travel to the edges of the LSC guided by internal total reflection.…”

Section: Introductionmentioning

confidence: 99%

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Zero‐Dimensional Perovskite Nanocrystals for Efficient Luminescent Solar Concentrators

Zhao

Sun

Wang

et al. 2019

Adv Funct Materials

170

133

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Luminescent solar concentrators (LSCs) are able to efficiently harvest solar energy through large-area photovoltaic windows, where fluorophores are delicately embedded. Among various types of fluorophores, all-inorganic perovskite nanocrystals (NCs) are emerging candidates as absorbers/emitters in LSCs due to their size/composition/dimensionality tunable optical properties and high photoluminescence quantum yield (PL QY). However, due to the large overlap between absorption and emission spectra, it is still challenging to fabricate high-efficiency LSCs. Intriguingly, zero-dimensional (0D) perovskites provide a number of features that meet the requirements for a potential LSC absorber, including i) small absorption/emission spectral overlap (Stokes shift up to 1.5 eV); ii) high PL QY (>95% for bulk crystal); iii) robust stability as a result of its large exciton binding energy; and iv) ease of synthesis. In this work, as a proof-of-concept experiment, Cs 4 PbBr 6 perovskite NCs are used to fabricate semi-transparent large-area LSCs. Cs 4 PbBr 6 perovskite film exhibits green emission with a high PL QY of ≈58% and a small absorption/emission spectral overlap. The optimized LSCs exhibit an external optical efficiency of as high as 2.4% and a power conversion efficiency of 1.8% (100 cm 2 ). These results indicate that 0D perovskite NCs are excellent candidates for high-efficiency LSCs compared to 3D perovskite NCs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zero‐Dimensional Perovskite Nanocrystals for Efficient Luminescent Solar Concentrators

Zhao

Sun

Wang

et al. 2019

Adv Funct Materials

170

133

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“…Owing to their electrical conductivity, nontoxicity, abundance, low cost, chemical stability, and sustainability, carbon nanomaterials are among the most suitable candidates for NIB anode materials . The development of novel carbon materials that possess superb capacity, long cycle life for the optimization of the overall battery properties is possible .…”

Section: Batteriesmentioning

confidence: 99%

The Research Development of Quantum Dots in Electrochemical Energy Storage

Zhan

et al. 2018

Small

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Quantum dots, which are made from semiconductor materials, possess tunable physical dimensions and outstanding optoelectronic characteristics, and they have aroused widespread interest in recent years. In addition to applications in biomolecular analysis, sensors, organic photovoltaic devices, fluorescence, solar cells, photochemical reagents, light-emitting diodes, and catalysis, quantum dots have attracted mounting attention in the field of electrochemical energy storage owing to their size confinement and anisotropic geometry. In this review, a comprehensive summary is given and the research progress of the study of quantum dots for batteries and electrochemical capacitors in recent years, including their synthesis methods, micro/nanostructural features, and electrochemical performance, is appraised.

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“…Please note the reduced overlap between the absorption and the PL spectra due to the indirect band gap nature of Si. [117] The reported N-doped C-dots display a broad absorption spectrum in the UV/blue region of the visible spectrum and excitation dependent PL shifting from 500 to 562 nm, due to a distribution of different emissive states. c) Schematic representation of the optical quantum efficiency evaluation by means of the integrated sphere method developed by Coropceanu and Bawendi, [24] displaying a 75% emission from the edge of the LSC.…”

Section: Carbon Dotsmentioning

confidence: 92%

The Renaissance of Luminescent Solar Concentrators: The Role of Inorganic Nanomaterials

Mazzaro

Vomiero

2018

Advanced Energy Materials

124

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While luminescent solar concentrators (LSCs) have a simple architecture—a transparent matrix embedding a luminescent fluorophore coupled with solar cells at the lateral side of the LSC slab—multiple paths for possible light losses exist. These are inherently interconnected, and in the past, limited the interest in this device, due to the gap between the theoretical possibilities and experimental achievements. This gap was a result, primarily, of the optical features of the luminescent dyes, since conventional organic luminophores are affected by limited performance in LSC devices. The rise of a wide portfolio of optically active inorganic nanomaterials in the last decade provides an alternative to organic dyes and has lead to a renaissance in the role of LSCs among the unconventional solar energy conversion devices. This paper reviews the latest results in the development of LSCs based on different classes of nanomaterials, focusing on the specific features and critically analyzing the pros and cons of the proposed structures. Particular attention is devoted to the role of the luminescence properties, e.g., the Stokes shift and the photoluminescence quantum yield, with respect to the performance of the LSC device. Future challenges to the successful employment of these devices for building integrated photovoltaics are also discussed.

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N-doped carbon-dots for luminescent solar concentrators

Abstract: N-doped carbon-dots (N-CDs) are for the first time reported to be used as phosphors for LSC fabrication.

Cited by 165 publications

References 34 publications

Zero‐Dimensional Perovskite Nanocrystals for Efficient Luminescent Solar Concentrators

Zero‐Dimensional Perovskite Nanocrystals for Efficient Luminescent Solar Concentrators

The Research Development of Quantum Dots in Electrochemical Energy Storage

The Renaissance of Luminescent Solar Concentrators: The Role of Inorganic Nanomaterials

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