Photophysics of Low-Dimensional Halide Perovskites
Tze Chien Sum a
a Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
#PhotoPero23 - Photophysics of halide perovskites and related materials – from bulk to nano
VALÈNCIA, Spain, 2023 March 6th - 10th
Organizers: Sascha Feldmann, Maksym Kovalenko and Jovana Milic
Invited Speaker, Tze Chien Sum, presentation 066
DOI: https://doi.org/10.29363/nanoge.matsus.2023.066
Publication date: 22nd December 2022

Halide perovskites possess outstanding optoelectronic properties favorable for applications as highly efficient absorbers in perovskite photovoltaics and as bright emitters in perovskite light emitting devices, lasers as well as quantum emitters. Underpinning this spectacular rise are their exceptional properties such as large absorption cross-sections, defect tolerance, large spin-orbit coupling, long balanced charge diffusion lengths, slow hot carrier cooling, ion migration, radiation tolerance etc. Hence, there has been a rapid proliferation of their applications beyond solar cells and light-emitting devices to fields such as spintronics, radiation detectors, memristors, bioimaging etc. Their versatile structures and diverse dimensionalities afford new levers for tunning their photophysical properties. For instance, the vast library of large organic cations allows one to tune the energy landscape in layered perovskites. In this talk, I will distill some of the underpinning photophysical mechanisms in low-dimensional emitters such as layered Ruddlesden Popper perovskites and colloidal perovskite nanocrystals. I will also take the opportunity to highlight some of our latest works on this topic.

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