Role of acceptor concentration-dependent FRET behind luminescence tuning in polymer capped ZnO for application in hybrid LEDs

Banerjee, Dhritiman; Kar, Asit Kumar

doi:10.1016/j.matlet.2021.130468

Cited by 9 publications

(4 citation statements)

References 5 publications

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“…24,25 Metal oxides, such as zinc oxide (ZnO) and bismuth trioxide (Bi 2 O 3 ), act as donors and acceptors frequently in recognition of their excellent spectral properties in the blue, green, and yellow regions. 26 The absorbance and emission of these materials can be entirely tuned from the visible to the infrared regimes by applying various synthesis routes. Nile blue A (NB) dye is an organic fluorescent dye with excellent photophysical properties, such as high quantum yield and a broad emission spectrum in the higher wavelength (red) region.…”

Section: Introductionmentioning

confidence: 99%

“…While progress has been achieved, the CRI of these materials is very low since they lack significant emissions from the blue-green region. Hence, the focus has shifted toward the blue-green emitting materials so as to improve the CRI of WLED significantly. , Metal oxides, such as zinc oxide (ZnO) and bismuth trioxide (Bi 2 O 3 ), act as donors and acceptors frequently in recognition of their excellent spectral properties in the blue, green, and yellow regions . The absorbance and emission of these materials can be entirely tuned from the visible to the infrared regimes by applying various synthesis routes.…”

Section: Introductionmentioning

confidence: 99%

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Tandem FRET: A Robust Mechanism for Efficient Fabrication of WLED Using an Organic–Inorganic Hybrid Mixture

Karthikeyan

2024

ACS Appl. Opt. Mater.

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This article highlights the development of an affordable white light-emitting material achieved through a sequential energy transfer process involving zinc oxide, bismuth (III) oxide, and Nile blue. ZnO and Bi2O3 were synthesized using a simple co-precipitation method, and Nile blue A was used as purchased. Conventional Forster Resonance Energy Transfer has been observed between the ZnO–Bi2O3 pair and the Bi2O3–Nile blue pairs. The decrease in steady-state fluorescence intensity has also been substantiated by a reduction in the fluorescence lifetime. When subjected to excitation at 370 nm, the mixtures of ZnO–Bi2O3–Nile blue exhibited emission spectra spanning the entire visible range. Here, Bi2O3 acts as an antenna in transferring the energy nonradiatively from ZnO to Nile blue, thereby facilitating cascaded FRET. The dye-nanohybrid mixture and PVA hydrogel were blended thoroughly and coated over a UV-LED to obtain a white LED. The electroluminescence spectra exhibited emission in the entire visible region. The obtained CIE coordinates of the fabricated WLED were (0.31, 0.33), close to pure white, with a color correlated temperature of 5639 K and a color rendering index of 95. The advent of this straightforward dye-nanohybrid mixture brings us closer to the possibility of designing a light-harvesting system suitable for implementation in display technology.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Tandem FRET: A Robust Mechanism for Efficient Fabrication of WLED Using an Organic–Inorganic Hybrid Mixture

Karthikeyan

2024

ACS Appl. Opt. Mater.

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“…There are some kinds of core-shell structures, such as semiconductor-organic passivator core-shell, semiconductor-semiconductor hetero structure, perovskite-inorganic protective layer core-shell, and chalcogenide quantum dot-perovskite core-shell [24]. Capping ZnO NPs with polyvinylpyrrolidone polymer enhances the spectral purity and reduces the quantum efficiency [25]. However, a balanced photocatalytic and quantum efficiency are obtained in silica-encapsulated ZnO QDs [26].…”

Section: Introductionmentioning

confidence: 99%

Engineering of Multidimensional Core-Shell Perovskite Precursors to Obtain Superior Luminescence and Incorporating in Luminescent Solar Concentrators

Bagherzadeh-Khajehmarjan,

Ahmadi-Kandjani,

AmirKooshesh

et al. 2024

International Journal of Energy Research

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The luminescence feature of perovskite NPs with high PLQY directs them to lighting and display applications. 2D A2MAn−1PbnBr3n+1 (n=1−6) perovskites with A as octylammonium and benzylammonium cations are synthesized by the LARP method, in which the highest PL emission is attained to the n=6 sample with benzylamine cation. XRD results reveal the appearance of diffraction peaks related to 3D perovskites with increasing n value. Mixing 3D perovskites with 2D ones leads to the formation of core-shell MAPbBr3−A2MAn−1PbnBr3n+1 (n=1−6) nanostructures, confirmed by TEM images and optical properties. Incorporation of Zn to core-shell perovskites improves the PL intensity and induces higher crystallinity. A blue shift in absorption and emission spectra of Zn-doped perovskites is observed. The highest PLQY (94%) is attributed to the Zn-doped core-shell perovskite with n=6 among the all-synthesized samples. Luminescent solar concentrators with thicknesses of 2 mm and 5 mm are fabricated with benzylamine-based perovskites, because of their greater PLQY versus octylamine-based perovskites. The performance of LSC devices is boosted for the LSC with 5 mm thickness. The relative PCE obtained for the core-shell perovskite-based LSC with thickness of 5 mm reaches to almost 60%.

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“…Also, there is a rising demand for new high-efficiency emitters 15 and efficient photocatalysts in the market. 16,17,19 Photocatalysis of pollutants using metal oxide nanoparticles has long been studied. Around 1970, the first study of photocatalytic activity of TiO 2 electrodes was reported, and it is a hot topic.…”

Section: Introductionmentioning

confidence: 99%

Structure-correlated excitation wavelength-dependent optical properties of ZnO nanostructures for multifunctional applications

Banerjee

Kar

2023

New J. Chem.

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Role of acceptor concentration-dependent FRET behind luminescence tuning in polymer capped ZnO for application in hybrid LEDs

Cited by 9 publications

References 5 publications

Tandem FRET: A Robust Mechanism for Efficient Fabrication of WLED Using an Organic–Inorganic Hybrid Mixture

Tandem FRET: A Robust Mechanism for Efficient Fabrication of WLED Using an Organic–Inorganic Hybrid Mixture

Engineering of Multidimensional Core-Shell Perovskite Precursors to Obtain Superior Luminescence and Incorporating in Luminescent Solar Concentrators

Structure-correlated excitation wavelength-dependent optical properties of ZnO nanostructures for multifunctional applications

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