Quantum Dots: Single Halide Perovskite/Semiconductor Core/Shell Quantum Dots with Ultrastability and Nonblinking Properties (Adv. Sci. 18/2019)

Tang, Xiaosheng; Yang, Jie; Li, Shiqi; Liu, Zhengzheng; Hu, Zhiping; Hao, Jiongyue; Du, Juan; Leng, Yuxin; Qin, Haiyan; Lin, Xing; Lin, Yue; Tian, Yuxi; Zhou, Miao; Xiong, Qihua

doi:10.1002/advs.201970107

Cited by 10 publications

(11 citation statements)

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“…Especially under the condition of high-power pumping, the accumulated joule heating accelerates the decomposition process, thus decreasing the laser performance. Ligand modification for perovskite quantum dots (QDs), [26,27] hydrophobic organic-layer engineering, [28] and perovskite QD-embedded polyacrylonitrile [29] have all been proved to be effective methods to prolong the laser's lifetime by isolating the perovskite gain materials from the air.…”

Section: Laser Stabilitymentioning

confidence: 99%

MAPbBr₃ First‐Order Distributed Feedback Laser with High Stability

Chang

Shi

Zou

et al. 2022

Advanced Photonics Research

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A green‐emitting perovskite first‐order distributed feedback (DFB) laser based on the methylammonium lead bromide (MAPbBr3) with high stability is demonstrated for the first time. The laser achieves stable lasing at 550 nm with a full width at half maximum of 0.4 nm. Low lasing threshold of 60 μJ cm−2 under nanosecond pulsed excitation and 3.1 μJ cm−2 under femtosecond pulsed excitation is observed, showing a much lower lasing threshold compared with the second‐order DFB cavities, which are fabricated on the same substrate. By optimizing the antisolvent treatment and encapsulating with poly(methyl methacrylate), the laser lifetime, resistance to moisture, lasing threshold, and intensity are significantly improved. The lasers are fabricated with a complementary metal‐oxide‐semiconductor‐compatible process, thus offer promising potential for the integrated photonic devices.

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Section: Laser Stabilitymentioning

confidence: 99%

MAPbBr₃ First‐Order Distributed Feedback Laser with High Stability

Chang

Shi

Zou

et al. 2022

Advanced Photonics Research

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“…The emergence of blueshift in PL is probably attributed to the diffusion of Sn ions into the core materials, which results in the increase of the bandgap. [ 32,36,37 ] Additionally, the slight etching of CsPbBr 3 NCs by the SnO 2 precursor may be also responsible for the blueshift. The measured PLQYs for the CsPbBr 3 NCs and the CsPbBr 3 @SnO 2 NCs are 52% and 3%, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…[ 31 ] Zhou's group prepared the CdS shells coating on the CsPbBr 3 NCs via the reaction of Cd‐oleate and sulfur. [ 32 ] Zhang's group developed an interfacial one‐pot synthesis of CsPbX 3 /SiO 2 core–shell NCs by mixing Cs 4 PbX 6 NCs, tetramethoxysilane (TMOS) and water under vigorous stirring. [ 33 ] Because the preparation of core–shell NCs asks for a strict synthesis conditions and allows small tolerance for the lattice mismatch between the core and shell materials, the synthesis of core–shell NCs becomes quite complicated and time‐consuming.…”

Section: Introductionmentioning

confidence: 99%

Photoelectron‐Extractive and Ambient‐Stable CsPbBr₃@SnO₂ Nanocrystals for High‐Performance Photodetection

Xiao

Wei

et al. 2022

Laser & Photonics Reviews

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The severe recombination of carriers and poor stability against moisture environment have limited the application of CsPbX3 (X = Cl, Br, I) nanocrystals in photodetection. Herein, a large‐scale synthesis of SnO2‐coated CsPbBr3 NCs (abbreviated to CsPbBr3@SnO2 NCs) has been reported for the first time by combining the water‐triggered transformation of Cs4PbBr6 NCs and the hydrolysis of tin 2‐ethylhexanoate. Owing to the construction of the CsPbBr3/SnO2 heterojunction, the recombination rate of carriers in the CsPbBr3@SnO2 NCs is greatly reduced compared to that of the pristine CsPbBr3 NCs. The stability against water degradation is also improved due to the protection of the SnO2 coating. Accordingly, a CsPbBr3@SnO2‐graphene hybrid device for high‐performance photodetection is demonstrated. Results show that the responsivity of the device reaches 6.2 ×$\ \ensuremath{\times{}}$104 A W−1 at 1 V, which is over 496‐fold of the pristine CsPbBr3 device. This work not only provides a robust approach for the surface modification of CsPbX3 NCs but also offers useful guidance on the optoelectronic applications with CsPbX3 NCs.

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“…CdS and PbS can be shelled or deposited on CsPbBr 3 and CsPbI 3 NCs by adopting different chemical protocols. [80,81] These chalcogenide-capped PeNCs showed improved chemical, thermal, and photostability compared to bare PeNCs. However, such structures were obtained by random deposition of chalcogenides on PeNCs without controllable 3D epitaxial growth.…”

Section: Core-shell Heterostructuresmentioning

confidence: 99%

Strategies to Extend the Lifetime of Perovskite Downconversion Films for Display Applications

et al. 2023

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Metal halide perovskite nanocrystals (PeNCs) have outstanding luminescent properties that are suitable for displays that have high color purity and high absorption coefficient; so they are evaluated for application as light emitters for organic light‐emitting diodes, light‐converters for downconversion displays, and future near‐eye augmented reality/virtual reality displays. However, PeNCs are chemically vulnerable to heat, light, and moisture, and these weaknesses must be overcome before devices that use PeNCs can be commercialized. This review examines strategies to overcome the low stability of PeNCs and thereby permit the fabrication of stable downconversion films, and summarizes downconversion‐type display applications and future prospects. First, methods to increase the chemical stability of PeNCs are examined. Second, methods to encapsulate PeNC downconversion films to increase their lifetime are reviewed. Third, methods to increase the long‐term compatibility of resin with PeNCs, and finally, how to secure stability using fillers added to the resin are summarized. Fourth, the method to manufacture downconversion films and the procedure to evaluate their reliability for commercialization is then described. Finally, the prospects of a downconversion system that exploits the properties of PeNCs and can be employed to fabricate fine pixels for high‐resolution displays and for near‐eye augmented reality/virtual reality devices are explored.

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Quantum Dots: Single Halide Perovskite/Semiconductor Core/Shell Quantum Dots with Ultrastability and Nonblinking Properties (Adv. Sci. 18/2019)

Cited by 10 publications

References 0 publications

MAPbBr₃ First‐Order Distributed Feedback Laser with High Stability

MAPbBr₃ First‐Order Distributed Feedback Laser with High Stability

Photoelectron‐Extractive and Ambient‐Stable CsPbBr₃@SnO₂ Nanocrystals for High‐Performance Photodetection

Strategies to Extend the Lifetime of Perovskite Downconversion Films for Display Applications

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Quantum Dots: Single Halide Perovskite/Semiconductor Core/Shell Quantum Dots with Ultrastability and Nonblinking Properties (Adv. Sci. 18/2019)

Cited by 10 publications

References 0 publications

MAPbBr3 First‐Order Distributed Feedback Laser with High Stability

MAPbBr3 First‐Order Distributed Feedback Laser with High Stability

Photoelectron‐Extractive and Ambient‐Stable CsPbBr3@SnO2 Nanocrystals for High‐Performance Photodetection

Strategies to Extend the Lifetime of Perovskite Downconversion Films for Display Applications

Contact Info

Product

Resources

About

MAPbBr₃ First‐Order Distributed Feedback Laser with High Stability

MAPbBr₃ First‐Order Distributed Feedback Laser with High Stability

Photoelectron‐Extractive and Ambient‐Stable CsPbBr₃@SnO₂ Nanocrystals for High‐Performance Photodetection