Mn-Doped Cesium Lead Chloride Perovskite Nanocrystals: Demonstration of Oxygen Sensing Capability Based on Luminescent Dopants and Host-Dopant Energy Transfer.

Author(s) Lin, F.; Li, F.; Lai, Z.; Cai, Z.; Wang, Y.; Wolfbeis, O.S.; Chen, X.
Journal ACS Appl Mater Interfaces
Date Published 2018 Jul 11
Abstract

The design of photoluminescence-quenching probes for molecular oxygen (O) is always a large space to explore. Luminescent semiconductor nanocrystals (NCs) have been proposed as emerging oxygen-responsive probes, but the inherent O sensing of phosphorescent semiconductor NCs has not been reported so far. Here, we demonstrate the O sensing capability of Mn-doped CsPbCl nanocrystals (Mn:CsPbCl NCs) and reveal the role of O on the optical de-excitation process of such perovskite nanocrystals (PNCs). By adjusting the amount and distribution of Mn dopants, as well as the host-dopant energy transfer process in PNCs, we highlight that O can reversibly quench the Mn emission due to the temporary disturbance to the ligand field of near-surface Mn dopants in PNCs. In phosphorescence mode, the photoluminescence intensity of the Mn:CsPbCl NCs is quenched by 53% on increasing O concentration from 0 to 100%. The Stern-Volmer plot shows a good linear in the 0-12% O concentration range. High sensing reversibility and rapid signal response are also achieved. In our perception, the mechanism study makes our PNCs candidates for the optical probes of O, and it is enlightening to explore more possibilities of the inherent O sensing based on the semiconductor-doped NCs (not restricted to Mn-doped PNCs) with phosphorescence emission.

DOI 10.1021/acsami.8b06329
ISSN 1944-8252
Citation Lin F, Li F, Lai Z, Cai Z, Wang Y, Wolfbeis OS, et al. Mn-Doped Cesium Lead Chloride Perovskite Nanocrystals: Demonstration of Oxygen Sensing Capability Based on Luminescent Dopants and Host-Dopant Energy Transfer. ACS Appl Mater Interfaces. 2018;10(27):23335-23343.

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