Integrating Down-Shifting and Down-Conversion into Metal–Organic Frameworks to Enhance the Spectral Conversion for Solar Cells

Yu, Yi; Lan, Lindong; Cai, Huaqiang

doi:10.1021/acs.jpcc.7b09184

Cited by 13 publications

(7 citation statements)

References 62 publications

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“…18 Compared to conventional inorganic phosphors, luminescent lanthanide coordination polymers provide unique opportunities for developing new emission materials due to their simple synthesis, controllable structure, abundant spectra as well as excellent thermostability. 19 However, pure lanthanide complexes have not been applied extensively in practical applications due to their photothermal instabilities, poor mechanical properties, and sensitive quenching effect to concentration or solvent molecules. 20 Therefore, to incorporate lanthanide emission species into polymer matrices could be a prerequisite for developing their practical applications.…”

Section: Introductionmentioning

confidence: 99%

2D Lanthanide Coordination Polymers: Synthesis, Structure, Luminescent Properties, and Ratiometric Sensing Application in the Hydrostable PMMA-Doped Hybrid Films

Song

Meng

Lin

et al. 2020

ACS Appl. Polym. Mater.

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Three Ln III coordination polymers [LnL(NO 3 ) 3 ] n • 2C 4 H 8 O 2 (LnL, Ln = Nd, NdL; Eu, EuL; Tb, TbL) based on an asymmetric polymonodentate ligand L, which has abundant branched end groups for chelating Ln III ions and strong light-harvesting ability to sensitize lanthanide luminescence, have been prepared and well characterized. Single-crystal X-ray diffraction studies reveal that they are isomorphic and feature unique undulated two-dimensional (2D) networks where ligand L acted as asymmetric trimonodentate connectors to bind three Ln III ions. Solid-state luminescence determination indicates that TbL emits bright green lights while EuL shows both Eu III -based red emission and L-based blue emission. For EuL, white emission with CIE coordinates of (0.3280, 0.3471) and (0.3441, 0.3236) was obtained upon excitation at 285 and 345 nm, which are close to the NTSC (National Television System(s) Committee) standard value for white emission. In addition, poly(methyl methacrylate) (PMMA) films doped with EuL and TbL (EuL@PMMA and TbL@PMMA) were developed to improve their luminescence performance, thermal stability, and water resistance. With the aid of the PMMA matrix, the emission with the CIE coordinates of (0.3304, 0.3119), which was much closer to the standard white light than that of EuL, resulted when EuL@ PMMA was excited at 296 nm. Prominently, both EuL@PMMA and TbL@PMMA exhibited ratiometric emission responses toward Zn 2+ selectively in water and could in-site detect Zn 2+ to render them as ratio luminescence sensors for Zn 2+ in aqueous solution.

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Section: Introductionmentioning

confidence: 99%

2D Lanthanide Coordination Polymers: Synthesis, Structure, Luminescent Properties, and Ratiometric Sensing Application in the Hydrostable PMMA-Doped Hybrid Films

Song

Meng

Lin

et al. 2020

ACS Appl. Polym. Mater.

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“…Furthermore, other rare-earth containing materials are also being used for increasing the solar cell efficiency like metalorganic framework with RE 3+ ions, dye-sensitized solar cells with rare-earth materials, and perovskite materials doped with luminescent RE ions (Goldschmidt and Fischer, 2015;de la Mora et al, 2017;Zhou et al, 2017;Yu et al, 2018).…”

Section: Enhancing the Photovoltaic/solar Cell Efficiencymentioning

confidence: 99%

Lanthanide-Doped Luminescent Nanophosphors via Ionic Liquids

Sharma¹,

Ghosh

2021

Front. Chem.

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Lanthanide (Ln3+) ion(s)-doped or rare-earth ion(s)-doped nanomaterials have been considered a very important class of nanophosphors for various photonic and biophotonic applications. Unlike semiconductors and organic-based luminescent particles, the optical properties of Ln3+-doped nanophosphors are independent of the size of the nanoparticles. However, by varying the crystal phase, morphology, and lattice strain of the host materials along with making core-shell structure, the relaxation dynamics of dopant Ln3+ ions can be effectively tuned. Interestingly, a judicious choice of dopant ions leads to unparallel photophysical dynamics, such as quantum cutting, upconversion, and energy transfer. Recently, ionic liquids (ILs) have drawn tremendous attention in the field of nanomaterials synthesis due to their unique properties like negligible vapor pressure, nonflammability, and, most importantly, tunability; thus, they are often called “green” and “designer” solvents. This review article provides a critical overview of the latest developments in the ILs-assisted synthesis of rare-earth-doped nanomaterials and their subsequent photonic/biophotonic applications, such as energy-efficient lighting and solar cell applications, photodynamic therapy, and in vivo and in vitro bioimaging. This article will emphasize how luminescence dynamics of dopant rare-earth ions can be tuned by changing the basic properties of the host materials like crystal phase, morphology, and lattice strain, which can be eventually tuned by various properties of ILs such as cation/anion combination, alkyl chain length, and viscosity. Last but not least, different aspects of ILs like their ability to act as templating agents, solvents, and reaction partners and sometimes their “three-in-one” use in nanomaterials synthesis are highlighted along with various photoluminescence mechanisms of Ln3+ ion like up- and downconversion (UC and DC).

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“…Here, Yu et al utilized Tb 3+ or Dy 3+ as bridging ions to modulate the Δ E and enhance the efficiency of EnT in Yb 3+ ‐doped MOFs. [ 68 ] The EnT efficiency in MOFs containing bridging ions is about threefold higher than in MOFs that have no bridging ions. The researchers in Yu's group also demonstrated that bridging ions such as Dy 3+ significantly increase the QY of Yb 3+ emission from 1.58% to 5.30%, which is close to the highest possible value of 5.88% for Yb 3+ coordination compounds containing CH bonds.…”

Section: Engineering Ent Processes In Mofsmentioning

confidence: 99%

Energy Transfer in Metal–Organic Frameworks and Its Applications

et al. 2020

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Photonic functional materials with designable and tunable energy transfer (EnT) processes have become increasingly popular as they significantly broaden the landscape of currently available luminescent materials. Metal–organic frameworks (MOFs), which are constructed from organic ligands and metal ions/clusters, possess highly ordered networks and tunable luminescent properties that make them excellent platforms for exploring EnT mechanisms and designing directional EnT processes. Although the EnT processes in MOFs have been extensively studied, the intricacies of the mechanisms between multiple emitting centers are still relatively unexplored. Thus, the rational design of tunable luminescent materials is quite arduous without a comprehensive understanding of these underlying mechanisms. In this review, the basic theories behind MOFs is systematically introduced from the perspective of the inherent EnT processes. The use of MOFs as ideal platforms for studying EnT processes and developing an efficient engineering strategy for enhancing luminescence and facilitating novel optical behaviors is highlighted. In addition, applications utilizing EnT in MOFs are emphasized, and the future prospects for the development of this technology are discussed.

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Integrating Down-Shifting and Down-Conversion into Metal–Organic Frameworks to Enhance the Spectral Conversion for Solar Cells

Cited by 13 publications

References 62 publications

2D Lanthanide Coordination Polymers: Synthesis, Structure, Luminescent Properties, and Ratiometric Sensing Application in the Hydrostable PMMA-Doped Hybrid Films

2D Lanthanide Coordination Polymers: Synthesis, Structure, Luminescent Properties, and Ratiometric Sensing Application in the Hydrostable PMMA-Doped Hybrid Films

Lanthanide-Doped Luminescent Nanophosphors via Ionic Liquids

Energy Transfer in Metal–Organic Frameworks and Its Applications

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