Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process

Shixun Wang; Yu Wang; Yu Zhang; Xiangtong Zhang; Xinyu Shen; Xingwei Zhuang; Po Lu; William W. Yu; Stephen V. Kershaw; Andrey L. Rogach

doi:10.1021/acs.jpclett.8b03750

Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process

Shixun Wang
, Yu Wang
, Yu Zhang^*
, Xiangtong Zhang
, Xinyu Shen
, Xingwei Zhuang
, Po Lu
, William W. Yu
, Stephen V. Kershaw
, Andrey L. Rogach^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

123 Citations (Scopus)

Abstract

Cesium lead halide perovskites emitting blue light in the 460-470 nm range of wavelengths have so far been plagued with rather poor luminescent performance, placing inevitable limitations on the development of perovskite nanocrystal-based blue light-emitting devices. Herein, a selective surface defect elimination process with the help of hydrated nitrates was introduced into the perovskite/toluene solution to strip the undesired surface defects and vacancies and to boost the photoluminescence quantum yield of true-blue-light-emitting (at 466 nm) CsPb(Cl/Br)₃ perovskite nanocrystals to the impressive value of 85%. Unlike the conventional passivation strategy, the anionic nitrate ions are able to desorb the undesired surface metallic lead and combine with excess surface metal ions, leaving perovskite quantum dots with better crystallinity and fewer surface defects.

Original language	English
Pages (from-to)	90-96
Journal	Journal of Physical Chemistry Letters
Volume	10
Issue number	1
Online published	19 Dec 2018
DOIs	https://doi.org/10.1021/acs.jpclett.8b03750
Publication status	Published - 3 Jan 2019

Funding

We acknowledge financial support from the Natural Science Foundation of China (NSFC) (51772123, 61675086, and 61722504); National Key Research and Development Program of China (2017YFB0403601); BORSF Professorship, the Institutional Development Award (P20GM103424); the Research Grant Council of Hong Kong S.A.R. (GRF project CityU11337616); the Special Project of the Province-University Co-constructing Program of Jilin University (SXGJXX2017-3); the Open Research Fund of State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences; and the Talent Introduction Plan of Overseas Top Ranking Professors by the State Administration of Foreign Expert Affairs (MSBJLG040).

RGC Funding Information

RGC-funded

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10.1021/acs.jpclett.8b03750

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Wang, S., Wang, Y., Zhang, Y., Zhang, X., Shen, X., Zhuang, X., Lu, P., Yu, W. W., Kershaw, S. V., & Rogach, A. L. (2019). Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process. Journal of Physical Chemistry Letters, 10(1), 90-96. https://doi.org/10.1021/acs.jpclett.8b03750

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title = "Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process",

abstract = "Cesium lead halide perovskites emitting blue light in the 460-470 nm range of wavelengths have so far been plagued with rather poor luminescent performance, placing inevitable limitations on the development of perovskite nanocrystal-based blue light-emitting devices. Herein, a selective surface defect elimination process with the help of hydrated nitrates was introduced into the perovskite/toluene solution to strip the undesired surface defects and vacancies and to boost the photoluminescence quantum yield of true-blue-light-emitting (at 466 nm) CsPb(Cl/Br)3 perovskite nanocrystals to the impressive value of 85\%. Unlike the conventional passivation strategy, the anionic nitrate ions are able to desorb the undesired surface metallic lead and combine with excess surface metal ions, leaving perovskite quantum dots with better crystallinity and fewer surface defects.",

author = "Shixun Wang and Yu Wang and Yu Zhang and Xiangtong Zhang and Xinyu Shen and Xingwei Zhuang and Po Lu and Yu, \{William W.\} and Kershaw, \{Stephen V.\} and Rogach, \{Andrey L.\}",

year = "2019",

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doi = "10.1021/acs.jpclett.8b03750",

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Wang, S, Wang, Y, Zhang, Y, Zhang, X, Shen, X, Zhuang, X, Lu, P, Yu, WW, Kershaw, SV & Rogach, AL 2019, 'Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process', Journal of Physical Chemistry Letters, vol. 10, no. 1, pp. 90-96. https://doi.org/10.1021/acs.jpclett.8b03750

Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process. / Wang, Shixun; Wang, Yu; Zhang, Yu et al.
In: Journal of Physical Chemistry Letters, Vol. 10, No. 1, 03.01.2019, p. 90-96.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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AU - Wang, Shixun

AU - Wang, Yu

AU - Zhang, Yu

AU - Zhang, Xiangtong

AU - Shen, Xinyu

AU - Zhuang, Xingwei

AU - Lu, Po

AU - Yu, William W.

AU - Kershaw, Stephen V.

AU - Rogach, Andrey L.

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N2 - Cesium lead halide perovskites emitting blue light in the 460-470 nm range of wavelengths have so far been plagued with rather poor luminescent performance, placing inevitable limitations on the development of perovskite nanocrystal-based blue light-emitting devices. Herein, a selective surface defect elimination process with the help of hydrated nitrates was introduced into the perovskite/toluene solution to strip the undesired surface defects and vacancies and to boost the photoluminescence quantum yield of true-blue-light-emitting (at 466 nm) CsPb(Cl/Br)3 perovskite nanocrystals to the impressive value of 85%. Unlike the conventional passivation strategy, the anionic nitrate ions are able to desorb the undesired surface metallic lead and combine with excess surface metal ions, leaving perovskite quantum dots with better crystallinity and fewer surface defects.

AB - Cesium lead halide perovskites emitting blue light in the 460-470 nm range of wavelengths have so far been plagued with rather poor luminescent performance, placing inevitable limitations on the development of perovskite nanocrystal-based blue light-emitting devices. Herein, a selective surface defect elimination process with the help of hydrated nitrates was introduced into the perovskite/toluene solution to strip the undesired surface defects and vacancies and to boost the photoluminescence quantum yield of true-blue-light-emitting (at 466 nm) CsPb(Cl/Br)3 perovskite nanocrystals to the impressive value of 85%. Unlike the conventional passivation strategy, the anionic nitrate ions are able to desorb the undesired surface metallic lead and combine with excess surface metal ions, leaving perovskite quantum dots with better crystallinity and fewer surface defects.

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Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process

Abstract

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GRF: Development of Robust Stable Perovskite Quantum Dots with Optimal Optical Performance for Light Emitting Device Applications

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Cesium Lead Chloride/Bromide Perovskite Quantum Dots with Strong Blue Emission Realized via a Nitrate-Induced Selective Surface Defect Elimination Process

Abstract

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RGC Funding Information

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GRF: Development of Robust Stable Perovskite Quantum Dots with Optimal Optical Performance for Light Emitting Device Applications

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