P‐203: <i>Late‐News Poster:</i> Novel Techniques for Highly Stable Luminescent Perovskite Halide Quantum Dots

Sinatra, Lutfan; Lutfullin, Marat; Abbas, Abdullah Saud; Pan, Jun; Bakr, Osman M.

doi:10.1002/sdtp.12463

Cited by 8 publications

(14 citation statements)

References 5 publications

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“…S8. The gradual increase in the PL intensity in the first 3 h could be attributed to the evaporation of reduced solvents and the formation of additional emissive centres linked to the dynamics of CsPbBr 3 perovskite NCs 33,34 . In the subsequent 12 h, the PL intensity remained stable under ambient conditions.…”

Section: Resultsmentioning

confidence: 99%

“…The photostability exceeds that of other untreated CsPbBr 3 perovskite NCs, which degrade within a few hours 35–38 . The reduction of the PL intensity after 16 h of intense continuous irradiation under a focused UVC light source is most likely due to the thermal degradation and photooxidation of lead atoms 33,39,40 . Further improvement of the photostability of the CsPbBr 3 film is undoubtedly possible by employing a core/shell structure 38 , surface passivating ligands 24,33 and encapsulation 35 , as demonstrated in other prior works.…”

Section: Resultsmentioning

confidence: 99%

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High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication

et al. 2019

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Optical wireless communication (OWC) using the ultra-broad spectrum of the visible-to-ultraviolet (UV) wavelength region remains a vital field of research for mitigating the saturated bandwidth of radio-frequency (RF) communication. However, the lack of an efficient UV photodetection methodology hinders the development of UV-based communication. The key technological impediment is related to the low UV-photon absorption in existing silicon photodetectors, which offer low-cost and mature platforms. To address this technology gap, we report a hybrid Si-based photodetection scheme by incorporating CsPbBr3 perovskite nanocrystals (NCs) with a high photoluminescence quantum yield (PLQY) and a fast photoluminescence (PL) decay time as a UV-to-visible colour-converting layer for high-speed solar-blind UV communication. The facile formation of drop-cast CsPbBr3 perovskite NCs leads to a high PLQY of up to ~73% and strong absorption in the UV region. With the addition of the NC layer, a nearly threefold improvement in the responsivity and an increase of ~25% in the external quantum efficiency (EQE) of the solar-blind region compared to a commercial silicon-based photodetector were observed. Moreover, time-resolved photoluminescence measurements demonstrated a decay time of 4.5 ns under a 372-nm UV excitation source, thus elucidating the potential of this layer as a fast colour-converting layer. A high data rate of up to 34 Mbps in solar-blind communication was achieved using the hybrid CsPbBr3–silicon photodetection scheme in conjunction with a 278-nm UVC light-emitting diode (LED). These findings demonstrate the feasibility of an integrated high-speed photoreceiver design of a composition-tuneable perovskite-based phosphor and a low-cost silicon-based photodetector for UV communication.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication

et al. 2019

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“…Furthermore, the QDs configuration is important to assess their stability, as the QD composition and interaction between the atoms are determining factors for the QD optical properties and stability [27]. Numerous researchers reported that inorganic PQDs exhibit superior properties for optical display compared to other types of PQDs in terms of low PL quenching and PL peak shifting at elevated temperature, as shown by Sinatra et al [27,28]. While PQDs have excellent optical properties, their display applications are limited to green emitting CsPbBr 3 PQDs.…”

Section: Introductionmentioning

confidence: 99%

Advances in Quantum-Dot-Based Displays

et al. 2020

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In terms of their use in displays, quantum dots (QDs) exhibit several advantages, including high illumination efficiency and color rendering, low-cost, and capacity for mass production. Furthermore, they are environmentally friendly. Excellent luminescence and charge transport properties of QDs led to their application in QD-based light-emitting diodes (LEDs), which have attracted considerable attention in display and solid-state lighting applications. In this review, we discuss the applications of QDs which are used on color conversion filter that exhibit high efficiency in white LEDs, full-color micro-LED devices, and liquid-type structure devices, among others. Furthermore, we discuss different QD printing processes and coating methods to achieve the full-color micro-LED. With the rise in popularity of wearable and see-through red, green, and blue (RGB) full-color displays, the flexible substrate is considered as a good potential candidate. The anisotropic conductive film method provides a small controllable linewidth of electrically conductive particles. Finally, we discuss the advanced application for flexible full-color and highly efficient QD micro-LEDs. The general conclusion of this study also involves the demand for a more straightforward QD deposition technique, whose breakthrough is expected.

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“…As shown in Figure 2a, the FAPbBr 3 @PVDF composite film exhibited brilliant green photoluminescence with a distinct peak centered at 531 nm, corresponding to the band-edge exciton emission from the embedded FAPbBr 3 nanocrystals. [12][13] The photoluminescence quantum yield (PLQY) reached over 93%, and full width at half maximum (FWHM) of the emission spectra remained around 23 nm. The narrow band emission ensures the possibility of realistic color rendering.…”

Section: Characterizations Of the Fapbbr3@pvdf Composite Filmmentioning

confidence: 99%

P‐113: In Situ Fabrication of Organic‐Inorganic Perovskite Polymer Composite Films for Ultrawide Color Gamut LCD display

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et al. 2020

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P‐203: Late‐News Poster: Novel Techniques for Highly Stable Luminescent Perovskite Halide Quantum Dots

Cited by 8 publications

References 5 publications

High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication

High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication

Advances in Quantum-Dot-Based Displays

P‐113: In Situ Fabrication of Organic‐Inorganic Perovskite Polymer Composite Films for Ultrawide Color Gamut LCD display

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