Doping as a Strategy to Tune Color of 2D Colloidal Nanoplatelets

Dufour, Marion; Izquierdo, Eva; Livache, Clément; Martinez, Bertille; Silly, Mathieu G.; Pons, Thomas; Lhuillier, Emmanuel; Delerue, Christophe; Ithurria, Sandrine

doi:10.1021/acsami.8b18650

Cited by 63 publications

(76 citation statements)

References 51 publications

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“…In 2019, Ag‐doped CdSe NPLs prepared by a partial CE method were reported by two groups. [ 16,103 ] As shown in Figure 5d, Ag‐doped CdSe NPLs exhibit spectral tunability in the range of 609–880 nm, with a Stokes shift of up to 1 eV and a PLQY approaching 50%. [ 103 ] Identical to the control of the doping level in the Cu‐doped CdSe NPLs system mentioned earlier, the Ag doping level, reflected in PL spectroscopy results, could also be adjusted from loose surface doping to substantial substitution with a pristine lattice by monitoring the reaction time and amounts of doping impurities.…”

Section: Emission Tunability For Cdse‐based Nplsmentioning

confidence: 99%

“…Previous studies on conventional quantum well semiconductors have shown that controlled doping with covalent elements is a powerful strategy to tailor the optoelectronic properties of materials of interest. [ 15 ] Inspired by the broad emission tunability by the introduction of dopant centers, controlled doping [ 16,17 ] has been used in CdSe NPLs to extend the emission wavelength to a wide range from 393 (purple) to 880 nm (deep red). Figure summarizes the resulting PL quantum yields (PLQY) and linewidths as a function of PL peak positions of the corresponding CdSe‐based NPLs prepared by different synthesis methods.…”

Section: Introductionmentioning

confidence: 99%

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Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Zhang

Sun

2021

Advanced Photonics Research

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Driven by the unique optoelectronic features arising from the strong quantum confinement along the thickness direction, rapid development of CdSe‐based nanoplatelets (NPL) has accomplished facile bandgap tunability over a broad spectrum via different preparation protocols or various postsynthesis treatments. The anisotropic geometry of NPLs also stimulates the exploitation of self‐assembled CdSe NPL superstructures to enhance light extraction efficiency in display technologies and achieves polarized lasing performance or even electrically pumped laser by adjusting the transition dipole orientation. Although several review articles about the general optical properties of CdSe NPLs have been published, none of them focus on the ability of spectral tunability and precise control of orientations in the solid‐state phase of CdSe NPLs. Herein, the band structure engineering approaches in the CdSe NPL family are systematically summarized and the optical properties and device performance metrics of these deliberately engineered NPLs are compared. Then, the recent advanced studies of the motivation and assembly methods of geometrically anisotropic CdSe NPL superlattices are discussed. Finally, the current challenges and future outlook on the controlled modification of optical features and the influences of the approaches in the aspect of CdSe NPL–based devices’ performance are highlighted.

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Section: Emission Tunability For Cdse‐based Nplsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Zhang

Sun

2021

Advanced Photonics Research

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“…Since impurity-doped nanocrystals can show not only the intrinsic merits of nanocrystals but additional advantages (e.g., enhanced thermal and chemical stability, improved PLQY, and reduced Auger recombination) [148][149][150], they are generally considered as promising candidate emitters for LEDs with high efficiency and increased stability. For the impurity-doped ABX 3 perovskites, A-, B-, and X-site doping have been extensively applied to PeLEDs for high performance.…”

Section: Impurity Dopingmentioning

confidence: 99%

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Xiao

Cheng

et al. 2021

Nanomaterials

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Recently, perovskite light-emitting diodes (PeLEDs) are seeing an increasing academic and industrial interest with a potential for a broad range of technologies including display, lighting, and signaling. The maximum external quantum efficiency of PeLEDs can overtake 20% nowadays, however, the lifetime of PeLEDs is still far from the demand of practical applications. In this review, state-of-the-art concepts to improve the lifetime of PeLEDs are comprehensively summarized from the perspective of the design of perovskite emitting materials, the innovation of device engineering, the manipulation of optical effects, and the introduction of advanced encapsulations. First, the fundamental concepts determining the lifetime of PeLEDs are presented. Then, the strategies to improve the lifetime of both organic-inorganic hybrid and all-inorganic PeLEDs are highlighted. Particularly, the approaches to manage optical effects and encapsulations for the improved lifetime, which are negligibly studied in PeLEDs, are discussed based on the related concepts of organic LEDs and Cd-based quantum-dot LEDs, which is beneficial to insightfully understand the lifetime of PeLEDs. At last, the challenges and opportunities to further enhance the lifetime of PeLEDs are introduced.

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“…Generally, impurity-doped nanocrystals can exhibit not only the intrinsic merits of nanocrystals but also additional advantages including enhanced thermal and chemical stability, improved photoluminescence quantum efficiency (PLQY), reduced Auger recombination, impurity-related emission, and tailored charge mobility [ 59 , 60 , 61 , 62 , 63 ]. Owing to these superiorities, impurity-doped nanocrystals have sparked efforts to satisfy the requirement of many optoelectronic applications.…”

Section: Introductionmentioning

confidence: 99%

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

Luo

Wang

Qiu³

et al. 2020

Nanomaterials

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In recent years, impurity-doped nanocrystal light-emitting diodes (LEDs) have aroused both academic and industrial interest since they are highly promising to satisfy the increasing demand of display, lighting, and signaling technologies. Compared with undoped counterparts, impurity-doped nanocrystal LEDs have been demonstrated to possess many extraordinary characteristics including enhanced efficiency, increased luminance, reduced voltage, and prolonged stability. In this review, recent state-of-the-art concepts to achieve high-performance impurity-doped nanocrystal LEDs are summarized. Firstly, the fundamental concepts of impurity-doped nanocrystal LEDs are presented. Then, the strategies to enhance the performance of impurity-doped nanocrystal LEDs via both material design and device engineering are introduced. In particular, the emergence of three types of impurity-doped nanocrystal LEDs is comprehensively highlighted, namely impurity-doped colloidal quantum dot LEDs, impurity-doped perovskite LEDs, and impurity-doped colloidal quantum well LEDs. At last, the challenges and the opportunities to further improve the performance of impurity-doped nanocrystal LEDs are described.

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Doping as a Strategy to Tune Color of 2D Colloidal Nanoplatelets

Cited by 63 publications

References 51 publications

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Manipulation of the Optical Properties of Colloidal 2D CdSe Nanoplatelets

Advances in Perovskite Light-Emitting Diodes Possessing Improved Lifetime

Emergence of Impurity-Doped Nanocrystal Light-Emitting Diodes

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