Fluorescence Blinking Beyond Nanoconfinement: Spatially Synchronous Intermittency of Entire Perovskite Microcrystals
| Autor: | Nithin Pathoor, Amitrajit Mukherjee, Jaladhar Mahato, Shaibal K. Sarkar, Arindam Chowdhury, Ansuman Halder |
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| Rok vydání: | 2018 |
| Předmět: |
MAPBI(3) PEROVSKITES
Photoluminescence Population RECOMBINATION 02 engineering and technology QUANTUM DOTS NANOWIRES 010402 general chemistry 01 natural sciences Catalysis law.invention PHOTOLUMINESCENCE BLINKING NANORODS law Intermittency transient traps education Perovskite (structure) hybrid perovskites Physics education.field_of_study Mesoscopic physics long-range communication SPECTROSCOPY business.industry Fluorescence intermittency General Chemistry General Medicine concerted blinking 021001 nanoscience & nanotechnology correlated carrier migration 0104 chemical sciences Semiconductor NANOCRYSTALS SINGLE Quantum dot Chemical physics LUMINESCENCE business 0210 nano-technology |
| Zdroj: | Angewandte Chemie (International ed. in English). 57(36) |
| ISSN: | 1521-3773 |
| Popis: | Abrupt fluorescence intermittency or blinking is long recognized to be characteristic of single nano-emitters. Extended quantum-confined nanostructures also undergo spatially heterogeneous blinking, however, there is no such precedence in dimensionally unconfined (bulk) materials. Here, we report multi-level blinking of entire individual organo-lead bromide perovskite micro-crystals (volume 0.1-3 micron-cuble) under ambient conditions. Extremely high spatiotemporal correlation (>0.9) in intra-crystal emission intensity fluctuations signifies effective communication amongst photogenerated carriers at distal locations (up to ~4 microns) within each crystal. Fused polycrystalline grains also exhibit this intriguing phenomenon, which is rationalized by correlated and efficient migration of carriers to a few transient non-radiative traps, the nature and population of which determine blinking propensity. Observation of spatiotemporally correlated emission intermittency in bulk semiconductor crystals opens up the possibility to design novel devices involving long range (mesoscopic) electronic communication. |
| Databáze: | OpenAIRE |
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