Morphology of perovskite film is a key important for achieving high performance perovskite solar cells. Perovskite films are commonly prepared by two-step spin-coating method. However, pin-holes...

In this work, we use a combination of dispersion-corrected density functional theory (DFT-D3) and the TiberCAD framework for the first time to investigate a newly designed and synthesized class of...

2016年9月1日 · XRD and NMR patterns indicate the superoxide generation through electron transfer from MAPbI 3 * to O 2 which attacks the perovskite absorber leading to the formation of methylamine (MeNH 2), lead iodide, iodine, and water as degradation products.

The examination of phase, crystallinity, morphology, and opto-electronic properties of the well-structured nanocone arrays is characterized by X-ray diffraction (XRD), scanning electron...

2022年11月13日 · The PbI 2-DMSO-assisted MAPbI 3 wafer shows higher XRD intensity for the (110) and (220) peaks than the conventional wafer suggesting better crystallinity in line with the SEM images. The steady-state photoluminescence (PL) and time-resolved photoluminescence (TRPL) properties of the conventional and PbI 2 -DMSO assisted MAPbI 3 perovskite ...

2025年1月1日 · X-ray diffraction (XRD) was utilized to investigate the effects of RbCl and VB4 on the structural properties of PbI 2. As depicted in Fig. 1 e, the addition of RbCl alone does not significantly alter the structure of PbI 2. Conversely, the introduction of VB4 alone results in an XRD pattern of PbI 2 that exhibits a prominent characteristic peak ...

2022年7月28日 · We propose stabilization of the perovskite by converting excess PbI 2 into an inactive, new, secondary-phase (PbI 2) 2 RbCl that can improve the stability of the perovskite FAPbI 3 layer (for simplicity, the perovskite film with (PbI 2) 2 RbCl is henceforth referred to as PIRC), in addition to improving its optoelectronic properties, the reducti...

Introducing a stoichiometric excess of lead iodide (PbI 2) in perovskite films has been demonstrated as an effective passivation strategy that can improve the power conversion efficiency (PCE) of perovskite solar cells (PSCs). However, excess PbI 2 is also known to accelerate the degradation of the perovskite layer.

Both UV-vis absorption spectrum and XRD spectrum proved the existence of PbI 2 (DMSO) domains, which decreased the devices EQE over 300–450 nm. Finally, by increasing the ratio of MAI in...

The single crystal PbI2 is characterized using: XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker) EDX: Energy-dispersive X-ray spectroscopy for stoichiometric analysis