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- W2894425567 abstract "We present a cation-exchange approach for tunable A-site alloys of cesium (Cs+) and formamidinium (FA+) lead triiodide perovskite nanocrystals that enables the formation of compositions spanning the complete range of Cs1- xFA xPbI3, unlike thin-film alloys or the direct synthesis of alloyed perovskite nanocrystals. These materials show bright and finely tunable emission in the red and near-infrared range between 650 and 800 nm. The activation energy for the miscibility between Cs+ and FA+ is measured (∼0.65 eV) and is shown to be higher than reported for X-site exchange in lead halide perovskites. We use these alloyed colloidal perovskite quantum dots to fabricate photovoltaic devices. In addition to the expanded compositional range for Cs1- xFA xPbI3 materials, the quantum dot solar cells exhibit high open-circuit voltage ( VOC) with a lower loss than the thin-film perovskite devices of similar compositions." @default.
- W2894425567 created "2018-10-05" @default.
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- W2894425567 date "2018-09-25" @default.
- W2894425567 modified "2023-10-16" @default.
- W2894425567 title "Perovskite Quantum Dot Photovoltaic Materials beyond the Reach of Thin Films: Full-Range Tuning of A-Site Cation Composition" @default.
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