Role of PC60BM in defect passivation and improving degradation behaviour in planar perovskite solar cells

In Situ Formation of NiOx Interlayer for Efficient n–i–p Inorganic Perovskite Solar Cells

“…Another interesting finding from Figure 5a is that CsPbI 2 Br perovskite emission peak appearing at 649 nm blue shifts to 645 nm for the NiO x -only sample, which could be ascribed to the reduced surface traps of the perovskite layers, as has been observed by many other researchers. 36,37 A further blue shift to 640 nm was observed when the NiO x interlayer is introduced between perovskite and Spiro. As the perovskite composition does not change, the blue shift suggests that the traps of perovskite is reduced, which can also be ascribed to the enhanced PV performance by the NiO x interlayer.…”

Defects and stability of perovskite solar cells: a critical analysis

“…Moreover, some studies have demonstrated that external additives such as PCBM and NH 4 Cl in the perovskite structure can also have an effect on reducing defects and improving the stability of perovskites. [75][76][77] Herein, a summary of the stability…”

Stable Hole-Transporting Material-Free Perovskite Solar Cells with Efficiency Exceeding 14% via the Introduction of a Malonic Acid Additive for a Perovskite Precursor

“…The HTM-free structure was initially used in lead-based devices to prevent the inclusion of standard Spiro-OMeTAD with moisture-sensitive lithium salt, which can increase PSC deterioration in the atmosphere . For instance, scientists described a conventional HF-PSC with a configuration of FTO/TiO 2 /ZrO 2 + perovskite/carbon that reached an approved performance of 12.8% as well as a significant increase in environmental stability. , Perovskites’ demonstrated ambipolar charge carrier properties make them ideal for use in PSCs with either a regular or inverted structure. − Solution-prepared perovskite layers frequently contain several grain boundaries (GBs) and trap states that can serve as nonradiative recombination sites, lowering the efficiency of photovoltaic devices. − Furthermore, in conditions of high temperature and/or moisture, organic substances can rapidly migrate, thereby accelerating the degradation of the perovskite film. − So, the photovoltaic performance of PSCs could be improved by using a high-quality perovskite layer with good surface morphology, low trap state density, and high crystallinity.…”