Multi-Pulse Time-Resolved Photoluminescence of Metal Halide Perovskites

Alexandr Marunchenko^a, Jitendra Kumar^a, Dmitry Tatarinov^b, Anatoly Pushkarev^b, Yana Vaynzoff^c^,^d, Ivan Scheblykin^a

^aChemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden

^bSchool of Physics and Engineering, ITMO University, 49 Kronverksky, St. Petersburg 197101, Russian Federation

^cChair for Emerging Electronic Technologies, Technical University of Dresden, Nöthnitzer Str. 61, 01187 Dresden, Germany

^dLeibniz-Institute for Solid State and Materials Research Dresden, Helmholtzstraße 20, 01069 Dresden, Germany

Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)

#PeroLIGHT - Perovskites for Light Emission: From Materials to Devices

Lausanne, Switzerland, 2024 November 12th - 15th

Organizers: Krishanu Dey, Sascha Feldmann and Xinyu Shen

Oral, Alexandr Marunchenko, presentation 049
Publication date: 28th August 2024

In this talk, I will demonstrate that the conventional time-resolved photoluminescence (TRPL) spectroscopy method does not work well for metal halide perovskites. This is because measurements of charge carrier lifetime and photoluminescence quantum yield can be misleading in the presence of hidden photoexcitations, such as charge carrier trapping. To address this, I will introduce a multi-pulse TRPL spectroscopy method and demonstrate it on cesium lead tribromide (CsPbBr₃) metal halide perovskite microplates. The multi-pulse TRPL allows scanning of the material luminescence state from nanoseconds to milliseconds. As a result, it allows direct extraction of the concentration of trapped charge carriers (over 10¹⁶ cm^-3) and the rate constant of trap depopulation (1.5×10^-10 cm³s^-1). At the end of my talk, I will show how the multi-pulse TRPL method can be used in photonic neuromorphic computing applications. This will be demonstrated with metal halide perovskite Memlumors - luminophores with memory. The multi-pulse TRPL method is already provided by setup producers, thus making it available for the researchers in advanced luminescent studies and applications.

References:

[1] Marunchenko, A., Kumar, J., Kiligaridis, A., Tatarinov, D., Pushkarev, A., Vaynzof, Y., & Scheblykin, I. G. (2024). Memlumor: A Luminescent Memory Device for Energy-Efficient Photonic Neuromorphic Computing. ACS Energy Letters, 9(5), 2075-2082.

[2] Marunchenko, A., Kumar, J., Kiligaridis, A., Rao, S. M., Tatarinov, D., Matchenya, I., Sapozhnikova, L., Ran, J., Telshow, O., Yulin, A., Pushkarev A., Vaynzof, Y., & Scheblykin, I. G. (2024). Charge Trapping and Defect Dynamics as Origin of Memory Effects in Metal Halide Perovskite Memlumors. The Journal of Physical Chemistry Letters, 15, 6256-6265.

Acknowledgements:

The work was supported Swedish Research Council (Grant2020-03530), Crafoord Foundation (Grant 20230552), and NanoLund (Grant 12-2023) and Wenner-GrenFoundation for the postdoctoral scholarship (GrantUPD2022-0132). This project has also received funding from the European Research Council (ERC) under the European Union’s Horizon 2020research and Innovation program (ERC Grant Agreement714067, ENERGYMAPS) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the Special PriorityProgram (SPP 2196) Project PERFECT PVs (Grant424216076) and the DFG for the generous support within the framework of the GRK 2767 (Project A7).

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