Metal-organic frameworks for white light emission: From synthesis to device fabrication

Chiu, Nan‐Chieh; Smith, Kyle T.; Stylianou, Kyriakos C.

doi:10.1016/j.ccr.2022.214441

Cited by 34 publications

(36 citation statements)

References 95 publications

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“…Although many LMOFs show exciting properties in terms of emission profiles, some other parameters like EQY/IQY, color purity, CCT must be scrutinized on a comprehensive scale to make LMOFs commercially viable. 139 Moreover, from the material perspective, LMOFs should be highly scalable, robust in terms of physio-chemical stability and photochemical stability so that the technology can be hybridized and brought to market for wide-spread usage. The governing mechanisms while designing LMOF based WLED devices are (a) downward conversion and (b) electroluminescence (EL).…”

Section: Advancement Of Lmofs In Device Fabrication For Commercial Te...mentioning

confidence: 99%

Luminescent MOFs (LMOFs): recent advancement towards a greener WLED technology

Karmakar

2022

Chem. Commun.

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Section: Advancement Of Lmofs In Device Fabrication For Commercial Te...mentioning

confidence: 99%

Luminescent MOFs (LMOFs): recent advancement towards a greener WLED technology

Karmakar

2022

Chem. Commun.

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“…Especially, the current mobile phone and computer screen display are generally realized by organic light-emitting diodes (OLEDs), and the generation of white light requires red, green, and blue light of the same level, which is a challenge to the loading of the device. 39 The addition of a white OLED device can solve such problems, so it is necessary to study and develop white light emission materials. At present, there are mainly three strategies for the synthesis of white light emitting MOFs: (i) direct synthesis of white light emitting MOFs, 40 that is, the white light emitting MOFs were directly synthesized by tuning the luminescence of ligands and metals, which is difficult because of its poor controllability.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The application of white light-emitting materials was studied for illumination and bioimaging. Especially, the current mobile phone and computer screen display are generally realized by organic light-emitting diodes (OLEDs), and the generation of white light requires red, green, and blue light of the same level, which is a challenge to the loading of the device . The addition of a white OLED device can solve such problems, so it is necessary to study and develop white light emission materials.…”

Section: Introductionmentioning

confidence: 99%

Cage Bismuth Metal–Organic Framework Materials Based on a Flexible Triazine–Polycarboxylic Acid: Subgram Synthesis, Application for Sensing, and White Light Tuning

et al. 2022

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Bismuth-based metal–organic frameworks (MOFs) have always attracted the attention of many researchers. Here, we first report a crystalline Bi-MOF (Bi-TDPAT) based on a flexible triazine-polycarboxylic linker 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine (H6TDPAT) and bismuth nitrate; its crystallite quality is adequately good and the diffraction data can be collected directly by single crystal X-ray diffraction rather than 3D electron diffraction. The structure of Bi-TDPAT belongs to a novel topology type btt. Notably, the synthesis scale of Bi-TDPAT can be expanded, and sub-gram synthesis can be realized. At the same time, we synthesized a microcrystalline material Bi-TATAB utilizing 2,4,6-tris(4-carboxylphenylamino)-1,3,5-triazine (H3TATAB). The structures of the two materials were characterized by several microanalysis tools. Considering that Bi-TDPAT is a blue light-emitting material with a broad emission peak, we prepared a white light emitting composite material Eu/Tb@Bi-TDPAT by encapsulating Eu(III)/Tb(III) in Bi-TDPAT. In addition, the fluorescence sensing functions of Bi-TDPAT and Bi-TATAB were explored. The results showed that they could detect and recognize various nitrophenols, and the optimal limit of detection is as low as 0.21 μM, which can be reused even after five cycles. Energy competitive absorption (CA) and photo-induced electron transfer are the main sensing mechanisms. By comparing and analyzing the properties of these two bismuth-based crystalline materials, we believe that this work also provides inspiration for the synthesis and development of bismuth-based MOF in the future.

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“…White-light emission in Ln-MOFs has been commonly achieved by incorporating chromophores with red, blue, and green emission (e.g., red-emitting Eu 3+ , green-emitting Tb 3+ , and a blue-emitting ligand) in the so-called RGB approach. , However, such materials require fine-tuning of the molar ratios of three luminescent components and the incorporation of at least two emissive lanthanides, which increases the cost of the final products. A more desirable approach toward color tuning would be using only two components, one that emits in the blue-green region and another emitting in the red region of the spectrum .…”

Section: Introductionmentioning

confidence: 99%

Mixed-Metal and Mixed-Ligand Lanthanide Metal–Organic Frameworks Based on 2,6-Naphthalenedicarboxylate: Thermally Activated Sensitization and White-Light Emission

et al. 2022

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Trivalent lanthanide ions (Ln 3+ ) hold an exceptional position in the field of optoelectronic materials due to their atomic-like emission spectra and long luminescence lifetimes. Metal−organic frameworks (MOFs) and coordination polymers are particularly suited as luminescent materials due to their structural diversity and ease of functionalization both at bridging ligands and/or metal centers. In this contribution, we present a series of mixed-metal Ln 3+ /Eu 3+ (Ln = La, Gd) and mixed-ligand (2,6-naphthalenedicarboxylate (ndc 2− ) and 4-aminonaphthalene-2,6-dicarboxylate (andc 2− )) MOFs belonging to three different structural types, with emissions spanning most of the visible region, thereby constituting favorable materials for color tuning and whitelight emission. We investigate the thermal stability and photophysical properties of the synthesized materials with regard to their metal and ligand doping levels and structural type, where we discuss excimer and monomer emission. The photophysical study, involving both steady-state and time-resolved luminescence measurements, allows us to discuss the possible energy migration and Eu 3+ sensitization pathways that take place within these materials following ligand excitation. Low-temperature luminescence studies led us to determine the energies of the ligand-based excited states and investigate their participation in thermally activated energy transfer mechanisms within the studied lattices. We observe emission quantum yields of up to 87% for the Eu 3+ -doped materials, while their ligand-and metal-doped counterparts show decreased quantum yields of up to 17%. Finally, we attempt fine color tuning by carefully adjusting the doping levels to achieve yellow and white-light emission.

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Metal-organic frameworks for white light emission: From synthesis to device fabrication

Cited by 34 publications

References 95 publications

Luminescent MOFs (LMOFs): recent advancement towards a greener WLED technology

Luminescent MOFs (LMOFs): recent advancement towards a greener WLED technology

Cage Bismuth Metal–Organic Framework Materials Based on a Flexible Triazine–Polycarboxylic Acid: Subgram Synthesis, Application for Sensing, and White Light Tuning

Mixed-Metal and Mixed-Ligand Lanthanide Metal–Organic Frameworks Based on 2,6-Naphthalenedicarboxylate: Thermally Activated Sensitization and White-Light Emission

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