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Temperature-Dependent Intensity Modulated Two-Photon Excited Fluorescence Microscopy for High Resolution Mapping of Charge Carrier Dynamics.
| Content Provider | Europe PMC |
|---|---|
| Author | Shi, Qi Kumar, Pushpendra Pullerits, Tönu |
| Copyright Year | 2023 |
| Description | We present a temperature-dependent intensity modulated two-photon excited fluorescence microscopy technique that enables high-resolution quantitative mapping of charge carrier dynamics in perovskite microcrystal film. By disentangling the emission into harmonics of the excitation modulation frequency, we analyze the first and second order charge carrier recombination processes, including potential accumulation effects. Our approach allows for a quantitative comparison of different emission channels at a micrometer resolution. To demonstrate the effectiveness of the method, we applied it to a methylammonium lead bromide perovskite microcrystal film. We investigated the temperature-dependent modulated imaging, encompassing the exciton dissociation-association and charge carrier trapping-detrapping equilibrium. Additionally, we explored the potential freezing out of traps and the phase transition occurring at low temperatures. |
| Abstract | We present a temperature-dependent intensity modulatedtwo-photonexcited fluorescence microscopy technique that enables high-resolutionquantitative mapping of charge carrier dynamics in perovskite microcrystalfilm. By disentangling the emission into harmonics of the excitationmodulation frequency, we analyze the first and second order chargecarrier recombination processes, including potential accumulationeffects. Our approach allows for a quantitative comparison of differentemission channels at a micrometer resolution. To demonstrate the effectivenessof the method, we applied it to a methylammonium lead bromide perovskitemicrocrystal film. We investigated the temperature-dependent modulatedimaging, encompassing the exciton dissociation-association and chargecarrier trapping-detrapping equilibrium. Additionally, we exploredthe potential freezing out of traps and the phase transition occurringat low temperatures. |
| Related Links | https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC10540292&blobtype=pdf |
| Volume Number | 3 |
| DOI | 10.1021/acsphyschemau.3c00013 |
| PubMed Central reference number | PMC10540292 |
| Issue Number | 5 |
| PubMed reference number | 37780538 |
| Journal | ACS Physical Chemistry Au [ACS Phys Chem Au] |
| e-ISSN | 26942445 |
| Language | English |
| Publisher | American Chemical Society |
| Publisher Date | 2023-07-07 |
| Access Restriction | Open |
| Rights License | Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2023 The Authors. Published by American Chemical Society |
| Subject Keyword | MAPbBr3 perovskite intensity modulation technique first-order recombination second-order recombination phase transition |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Physical and Theoretical Chemistry Computational Theory and Mathematics Computer Science Applications |
