Simulation and analysis of high-performance hole transport material SrZrS3-based perovskite solar cells with a theoretical efficiency approaching 26%

Improved Efficiency and Stability in 1,5-Diaminonaphthalene Iodide-Passivated 2D/3D Perovskite Solar Cells

“…Over the past decade, organic–inorganic hybrid perovskites (OIHPs) have been at the forefront of the research activity in the field of new-age semiconductors for low-cost optoelectronics, skyrocketing the photovoltaics field with a constantly increasing power conversion efficiency (PCE) of beyond 25.7%. − The exceptional optoelectronic properties of three-dimensional (3D) OIHPs, such as low-temperature cost-effective facile solution processability, relatively lower exciton binding energies, higher charge carrier diffusion ability, and superior defect tolerance, have made them highly desirable as light harvesters. − Although the PCE of 3D-OIHPs is almost comparable to that of existing inorganic silicon solar cells (PCE ∼ 26.7%), the ambient device stability is still a critical bottleneck for their prospective market uptake. − On the contrary, low-dimensional (2D) perovskites, obtained by inserting the long-chain hydrophobic amine molecule in between the inorganic corner-sharing lead halide octahedral sheets, exhibit much better moisture and thermal resistance in comparison to their 3D counterpart. − However, in contrast to 3D perovskites, the insulating bulky organic spacer in 2D perovskites leads to strong quantum confinement, and increased band gap and exciton binding energies, further resulting in poor charge carrier transport and therefore a lower PCE in 2D PSCs. − Interestingly, engineering multidimensional perovskite interfaces or 2D/3D heterostructures has been revealed as an effective approach to integrate the high efficiency of the 3D perovskite devices with the improved humidity resistance of the 2D perovskite layer. , Here, the spare bulky organic ammonium halide reacts with the remaining lead iodide (PbI 2 ) to fabricate the formation of a layered 2D perovskite, which exhibits improved ambient stability against moisture and heat due to the hydrophobic and nonvolatile characteristics of the bulky organic cation. In majority, 2D perovskites simultaneously function as a surface defect passivant layer and an interfacial barrier that reduces charge recombination, which has a favorable impact on the open-circuit voltage ( V oc ) of the device. , …”