Different synthesis methods of PbI 2 precursor and relative performance of perovskite solar cells. a) Schematic diagram of water solution-based PbI 2 synthesis (labeled "Type I") for which potassium iodide and lead(II) nitrate are dissolved in water separately, and these two transport solvents are mixed in the vessel with a heating process.
About Photovoltaic Energy StorageWe herein determine the important figure of merit of radiative efficiency for Methylammonium Lead Iodide perovskite solar cells and, to put in context, relate it to an organic photovoltaic (OPV) ...
About Photovoltaic Energy StorageThe presence of unreacted lead iodide in organic–inorganic lead halide perovskite solar cells is widely correlated with an increase in power conversion efficiency. We investigate the mechanism for this increase by identifying the role of surfaces and interfaces present between methylammonium lead iodide perovskite films and excess …
About Photovoltaic Energy StoragePerovskite materials have been particularly eye-catching by virtue of their excellent properties such as high light absorption coefficient, long carrier lifetime, low exciton binding energy and ambipolar transmission (perovskites have the characteristics of transporting both electrons and holes). Limited by
About Photovoltaic Energy StorageWe report on solid-state mesoscopic heterojunction solar cells employing nanoparticles (NPs) of methyl ammonium lead iodide (CH3NH3)PbI3 as light harvesters.
About Photovoltaic Energy StorageAn understanding of the interaction of water with perovskite is crucial in improving the structural stability of the perovskite. Hence, in this study, the structural and electronic properties of the γ-CsPbI 3 (220) perovskite surface upon the adsorption of water molecules have been investigated based on density functional theory calculations.
About Photovoltaic Energy StorageThe resulting perovskite thin layers facilitated the fabrication of perovskite solar cells with a power-conversion efficiency of 26.08% (certified 25.73%) under standard illumination.
About Photovoltaic Energy StorageIt is widely believed that excess/residual lead iodide (PbI 2) can affect the performance of perovskite solar cells . Moderate PbI 2 can enhance efficiency by …
About Photovoltaic Energy StorageUsing electron backscattered diffraction (EBSD), the crystal orientation in methylammonium lead iodide thin films with submicrometer resolution is reported. For the vast majority of (110) oriented grains, the c‐axis of the perovskite unit cell is …
About Photovoltaic Energy StoragePerovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr3-xI x, where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step ...
About Photovoltaic Energy StorageOrganic–inorganic lead halide based perovskites solar cells are by far the highest efficiency solution-processed solar cells, threatening to challenge thin film and polycrystalline silicon ones. Despite …
About Photovoltaic Energy StorageAn understanding of the interaction of water with perovskite is crucial in improving the structural stability of the perovskite. Hence, in this study, the structural and electronic properties of the γ-CsPbI3(220) perovskite surface upon the adsorption of water molecules have been investigated based on densit
About Photovoltaic Energy StorageThe presence of excess lead iodide in halide perovskites has been key for surpassing 20% photon-to-power conversion efficiency. To achieve even higher power …
About Photovoltaic Energy StorageBlack phase cesium lead iodide perovskite is regarded as a promising candidate for solar cells, but it easily transits to undesired yellow phase. Herein, Wang et al. stabilized the black phase ...
About Photovoltaic Energy StorageAt present, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has reached 26.1%. Polycrystalline perovskite films prepared by sequential deposition are often accompanied by excess PbI2. Although excess PbI2 can reduce the internal defects of the perovskites and promote charge transfer, excess PbI2 is unevenly …
About Photovoltaic Energy StorageSolar Cells Hot Paper Managing Excess Lead Iodide with Functionalized Oxo-Graphene Nanosheets for Stable Perovskite Solar Cells Guixiang Li+, Yalei Hu+, Meng Li,* Ying Tang, Zuhong Zhang, Artem Musiienko, Qing Cao, Fatima Akhundova, Jinzhao Li
About Photovoltaic Energy StorageExcess lead iodide (PbI 2) causes perovskite degradation, although it aids in crystal growth and defect passivation. Herein, we synthesized functionalized oxo …
About Photovoltaic Energy StorageHere, the activation energies for ionic migration in methylammonium lead iodide (CH3NH3PbI3) are derived from first principles, and are compared with kinetic …
About Photovoltaic Energy StorageOrganic-inorganic lead halide based perovskites solar cells are by far the highest efficiency solution-processed solar cells, threatening to challenge thin film and polycrystalline silicon ones. Despite the intense research in this area, concerns surrounding the long-term stability as well as the to …
About Photovoltaic Energy StorageLead-halide perovskites have emerged as high-performance photovoltaic materials. We mapped the propagation of photogenerated luminescence and …
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