Projects per year
Abstract
Owing to their large absorption cross-sections and high photoluminescence quantum yields, lead halide perovskite quantum dots (PQDs) are regarded as a promising candidate for various optoelectronics applications. However, easy degradation of PQDs in water and in a humid environment is a critical hindrance for applications. Here we develop a Pb-S bonding approach to synthesize water-resistant perovskite@silica nanodots keeping their emission in water for over six weeks. A two-photon whispering-gallery mode laser device made of these ultra-stable nanodots retain 80% of its initial emission quantum yield when immersed in water for 13 h, and a two-photon random laser based on the perovskite@silica nanodots powder could still operate after the nanodots were dispersed in water for up to 15 days. Our synthetic approach opens up an entirely new avenue for utilizing PQDs in aqueous environment, which will significantly broaden their applications not only in optoelectronics but also in bioimaging and biosensing.
| Original language | English |
|---|---|
| Article number | 1192 |
| Journal | Nature Communications |
| Volume | 11 |
| Online published | 4 Mar 2020 |
| DOIs | |
| Publication status | Published - 2020 |
Publisher's Copyright Statement
- This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/
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ResCtrs: Centre for Functional Photonics (CFP)
ROGACH, A. (Principal Investigator / Project Coordinator), LEI, D. (Co-Principal Investigator), CHAN, K. S. (Co-Investigator), CHAN, M. C. W. (Co-Investigator), HO, J. C. Y. (Co-Investigator), HSU, P. S.H.-Y. (Co-Investigator), KO, C. C. V. (Co-Investigator), LAM, H. W. M. (Co-Investigator), LI, Y. (Co-Investigator), LO, K. W. K. (Co-Investigator), TSO, C. Y. (Co-Investigator), YIP, H. L. (Co-Investigator), ZAPIEN, J. A. (Co-Investigator), ZHANG, R. (Co-Investigator), ZHANG, K. (Co-Investigator) & ZHI, C. (Co-Investigator)
26/10/10 → …
Project: Research
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NSFC: Synthesis of Anisotropic Perovskite Nanocrystals with Polarized Emission for Light Emitting Diodes
ROGACH, A. (Principal Investigator / Project Coordinator), HUANG, H. (Co-Investigator), KERSHAW, S. V. (Co-Investigator), SCHNEIDER, J. (Co-Investigator), XIONG, Y. (Co-Investigator) & Zhong, H. (Co-Investigator)
1/01/18 → 18/02/22
Project: Research
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GRF: Design and fabrication of Au@CaF2:Yb/Er hybrid nanostructures with enhanced upconversion emission for fluorescence bioimaging
LEI, D. (Principal Investigator / Project Coordinator)
1/01/15 → 30/06/18
Project: Research