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Perovskite Quantum Dot Solar Cells (PQDSC) are very promising in contributing to the renewable energy mix of the future. Perovskite Quantum Dot Layers are used as active layer within solar cells due to the quantum confinement which occurs at crystales size below the Bohr radius.[1] Therefore they provide high power conversion efficiencies, high photoluminescence quantum yield (PLQY), a narrow photoluminescence (PL) peak, and are stable in comparisson to bulk perovskite.[1]
Furthermore, the range of usable X halides (I-, Br-, Cl-) and A cations (FA+, MA+, Cs+) enables fine control of the bandgap over the whole visible spectrum of the ABX3 perovskite structure.[14]
In this work Cesium-Formamidinium Lead Iodide perovskite quantum dot layers have been prepared using different washing processes in between several deposition steps, as well as changing the ratio between Cesium Lead Iodide PQD and Formamidinium Lead Iodide PQD. Therefore different measurement techniques (PL, microscopy, and scanning-electron-microscopy (SEM)) were used to observe the optoelectronic properties of the final film.
[1] L. Liu et al., Adv. Sci. 9.7, 2104577 (2022)
[2] L. Protesescu et al. Phys. Nano. Lett. 15.6, 3692–3696 (2015)
