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- W4386410902 abstract "Perovskites have gained popularity both as the active material in photovoltaics and as bulk triplet sensitizers for solid-state triplet-triplet annihilation upconversion (TTA-UC). Prior to widespread implementation into commercial photovoltaics an in-depth understanding of the environmental influences on device performance is required. To this point, the temperature dependent structure-function properties of TTA-UC within methylammonium formamidinium lead triiodide (MAFA)/rubrene UC devices are explored. A strong temperature dependence of the underlying UC dynamics is observed, where the maximum UC efficiency is achieved at 170 K reflecting the competition between triplet diffusion length, diffusion rate, and triplet-triplet encounter events. A combination of spectroscopic and structural methods and theoretical modelling illustrates that despite the significantly increased carrier lifetime of the perovskite at low temperatures, the TTA-UC dynamics are not governed by the underlying sensitizer properties but rather limited by the underlying triplet diffusion." @default.
- W4386410902 created "2023-09-05" @default.
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- W4386410902 date "2023-09-04" @default.
- W4386410902 modified "2023-10-01" @default.
- W4386410902 title "Cool Carriers: Triplet Diffusion Dominates Upconversion Yield" @default.
- W4386410902 doi "https://doi.org/10.26434/chemrxiv-2023-kj4ts" @default.
- W4386410902 hasPublicationYear "2023" @default.
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