Shining Bright: Using Luminescence to Unveil Photophysical Behaviour in Halide Perovskite Devices
Sam Stranks a
a University of Cambridge, JJ Thomson Avenue, Cambridge, United Kingdom
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, Sam Stranks, presentation 099
DOI: https://doi.org/10.29363/nanoge.matsus.2023.099
Publication date: 22nd December 2022

Halide perovskites are exciting materials ushering in a new wave of photovoltaic and light-emitting technologies, with efficiencies already comparable to or beating more traditional semiconducting systems. However, a full understanding of carrier recombination and how it relates to performance losses and device operation in various device structures remains elusive. Here I will present results where we exploit luminescence from these materials to understand carrier recombination. I will give examples of different dimentionality systems and where carrier/exciton funnelling is critical for device operation. The luminescence approaches also allow tracking of device operation over time, and a decoupling of the impact of the active layer and contacts in understanding performance losses. These results allow us to draw generalised conclusions about carrier recombination and device performance and instability pathways driven by carrier trapping. Finally, I will show how we are exploiting this understanding to develop new solar cell and lighting devices, further pushing performances up.

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