Mn2+/Yb3+ Codoped CsPbCl3 Perovskite Nanocrystals with Triple‐Wavelength Emission for Luminescent Solar Concentrators

Cai, Tong; Wang, Junyu; Li, Wenhao; Hills‐Kimball, Katie; Yang, Hanjun; Nagaoka, Yosuke; Yuan, Yucheng; Zia, Rashid; Chen, Ou

doi:10.1002/advs.202001317

Cited by 145 publications

(147 citation statements)

References 83 publications

(245 reference statements)

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“…Another use of perovskites LnSNCs that has been showcased in the field of photovoltaics is the preparation of luminescent solar concentrators (LSCs). [294][295][296] This technology relies on the use of a polymeric dispersion of fluorophores in the form of slabs, on whose edges photovoltaic devices (cells) are attached. 297 The fluorophores absorb the light of the sun, convert it to light usable by the coupled cells, and concentrate this light at the edges in a waveguide-like fashion by total internal reflection (Figure 18B).…”

Section: Photovoltaicsmentioning

confidence: 99%

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Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence

2020

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The spectrally narrow, long-lived luminescence of lanthanide ions makes optical nanomaterials based on these elements uniquely attractive from both a fundamental and applicative standpoint. A highly coveted class of such nanomaterials is represented by colloidal lanthanide-doped semiconductor nanocrystals (LnSNCs). Therein, upon proper design, the poor light absorption intrinsically featured by lanthanides is compensated by the semiconductor moiety, which harvests the optical energy and funnel it to the luminescent metal center. Although a great deal of experimental effort has been invested to produce efficient nanomaterials of that sort, relatively modest results have been obtained thus far. As of late, halide perovskite nanocrystals have surged as materials of choice for doping lanthanides, but they have non-negligible shortcomings in terms of chemical stability, toxicity, and light absorption range. The limited gamut of currently available colloidal LnSNCs is unfortunate, given the tremendous technological impact that these nanomaterials could have in fields like biomedicine and optoelectronics. In this Review, we provide an overview of the field of colloidal LnSNCs, while distilling the lessons learnt in terms of material design. The result is a compendium of key aspects to consider when devising and synthesizing this class of nanomaterials, with a keen eye on the foreseeable technological scenarios where they are poised to become front runners.* In their book "Understanding Chemistry", Pimentel and Sprately commented how "Lanthanum has only one important oxidation state in aqueous solution, the +3 state. With few exceptions, this tells the whole boring story about the other 14 Lanthanides". Scheme 1. Aspects discussed in this Review about colloidal Ln 3+ -doped semiconductor nanocrystals (LnSNCs). * In 1798, B. M. Tassaert reported the first coordination compound of cobalt and ammonia without, however, fully understanding the material. Passing through S. M. Jörgensen's chain theory to explain metal complexes, it was only in 1893 that A. Werner finally realized the existence of a principal (oxidation state) and auxiliary (coordination number) for the metal in that "odd" class of complex compounds (as Tassaert first referred to them).* This last statement is only partially true. There are slight changes in the position of the 4f-4f emission lines of Ln 3+ depending on the coordination environment of the ion. The extent of such shifts is of up to a few hundred wavenumbers at most and they occur because of the so-called nephelauxetic effect, where changes in the bond length between Ln 3+ and the surrounding anions result in variation of 4f electronic distribution. * A Lewis acid is a species that accepts lone electron pairs from a donor species (Lewis bases). The less (more) the Lewis acid is polarizable, the harder (softer) its acid character is, according to the hard soft acids bases (HSAB) theory. This acidity can be regarded as a measure of how "thirsty" for electrons a species is.* Preliminary information a...

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Section: Photovoltaicsmentioning

confidence: 99%

“…Very recently, Cai et al proposed the use of CsPbCl3:Yb 3+ ,Mn 2+ for the preparation of LSCs. 294 Upon adjustment of the dopants concentration, emission from the host (approx. 400 nm) and the two doped ions (approx.…”

Section: Photovoltaicsmentioning

confidence: 99%

Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence

2020

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“…Furthermore, Gamelin and coworkers [85] have introduced Yb 3+ cations into CsPbCl 3 PNCs (doping 5.2%), raising the PLQY above 100% in the near-IR (NIR) region. Taking advantage of 2 F 5/2 → 2 F 7/2 f-f emission of Yb 3+ , which is an effective activator of quantum cutting (one highenergy photon is absorbed and then two-low energy photons are generated) [78,86], the carrier transfer from the host is accelerated, improving the radiative relaxation of the modified CsPbCl 3 . After Yb 3+ doping and varying the intensity of the excitation source (λ = 380 nm), a highest PLQY of around 170% was achieved (Figure 3C).…”

Section: Partial Pb Substitution: Dopingmentioning

confidence: 99%

“…(B) Evolution of the PLQYs of washed PNCs according to the different methodologies. See[5,25,52,53,55,58,64,[66][67][68]72,74,82,86,88,97].…”

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confidence: 99%

Progress in halide-perovskite nanocrystals with near-unity photoluminescence quantum yield

Gualdrón‐Reyes

Masi

Mora‐Seró

2021

Trends in Chemistry

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Colloidal halide perovskite nanocrystals (PNCs) are an outstanding case study due to their remarkable optical features, such as a high photoluminescence (PL) quantum yield (PLQY), tunable band gap, and narrow emission. Despite the impressive first reports of PLQYs beyond 70%, it has been observed that PLQY is limited by structural defects arising from labile interactions between the organic capping ligand and the inorganic core. Structural defects acting as trap states are key factors limiting both PNC PLQY and stability. In this review, we present the most studied, common, and alternative protocols to fully compensate for surface defects (e.g., halide vacancies, loss of protective capping ligands) as well as how to increase their stability and PLQY to unity (i.e., 100% when PLQY is expressed as a percentage). Defective PNCs after synthesis HighlightsThe loss of the ligand-protecting shell and the formation of surface defects in perovskite halide nanocrystals (PNCs) are the main issues causing deteriorated photoluminescence quantum yield (PLQY) and, thereby, reduced quality of the final product.

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“…Organic QDs such as carbon quantum dots (CQDs) [62–64] and graphene quantum dots (GQDs) [65–68] are promising nanoparticles for their natural abundance, high photostability, and photoconversion capabilities. The doping of QDs with other compounds such as organic dyes such as Coumarin or metals such as Cu has resulted in improved optical efficiencies by reducing reabsorption losses and controlling the frequencies of re‐emitted light [69–75] . Different QDs can be used in multi‐layered (tandem) LSC devices to capture a wider frequency range of incident light, thereby improving the overall absorption and decreasing reabsorption [76–79] .…”

Section: Introductionmentioning

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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Mn²⁺/Yb³⁺ Codoped CsPbCl₃ Perovskite Nanocrystals with Triple‐Wavelength Emission for Luminescent Solar Concentrators

Cited by 145 publications

References 83 publications

Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence

Doping Lanthanide Ions in Colloidal Semiconductor Nanocrystals for Brighter Photoluminescence

Progress in halide-perovskite nanocrystals with near-unity photoluminescence quantum yield

Review on Colloidal Quantum Dots Luminescent Solar Concentrators

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