2021年1月19日 · We demonstrate the preservation of a black CsPbI 3 perovskite structure to room temperature by subjecting the δ phase to pressures of 0.1 – 0.6 GPa followed by heating and rapid cooling....

Inorganic cesium lead triiodide (CsPbI3) perovskite materials are becoming increasingly attractive for use in perovskite/silicon tandem solar cells, due to their almost ideal band gap energy...

2017年10月11日 · Here, we report a facile method to stabilize the α-phase CsPbI3 films via a single-step film deposition process. A small amount (∼1.5 wt %) of sulfobetaine zwitterion mixed in CsPbI3 precursor solution could facilitate the formation of black-phase CsPbI3 films that show significantly improved phase stability in air.

2019年8月9日 · To determine the crystal structure of the perovskite films, we used x-ray scattering (XRD) techniques, including synchrotron-based grazing incidence wide-angle x-ray scattering (GIWAXS). We indexed the XRD patterns to β-CsPbI 3 (Fig. 1B and fig. S7), a phase of CsPbI 3 previously observed only above 230°C.

2024年5月15日 · To confirm the formation of Cs 2 PbI 2 Cl 2, we analyzed the X-ray diffraction (XRD) patterns of the peeled-off CsPbI 3, Br-CsPbI 3, Cl-CsPbI 3, and Br/Cl-CsPbI 3 perovskite layers (Figure 2 A). All perovskite layers showed the β phase of CsPbI 3 with two dominant peaks near 14° and 28°, which can be assigned to the β(100) and β(200 ...

LEDs fabricated with our ultrastable lecithin-capped CsPbI3 QDs exhibit an external quantum efficiency (EQE) of 7.1% for electroluminescence centered at 634 nm─a record for all-inorganic ...

2019年7月8日 · We use a solid-state method to synthesize single crystals of perovskite-phase cesium lead iodide (γ-CsPbI 3) that are kinetically stable at room temperature. Single crystal X-ray diffraction characterization shows the compound is orthorhombic with the GdFeO 3 structure at room temperature.

2024年4月15日 · We verified the long-term stability of δ-CsPbI 3 in a humid and oxygen-rich environment by characterizing its X-ray diffraction (XRD) patterns after 0, 3, and 7 days of exposure to air.

2021年3月19日 · Here, we demonstrate a strategy to improve structural and electrical long-term stability in γ-CsPbI 3 by the use of an ultraviolet-curable polyethylene glycol dimethacrylate (PEGDMA) polymer...

CsPbI3 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Cs1+ is bonded in a 9-coordinate geometry to nine I1- atoms. There are a spread of Cs–I bond distances ranging from 3.98–4.36 Å. Pb2+ is bonded to six I1- …