Impact of Li doping on the photophysical properties of perovskite absorber layer FAPbI3

Simultaneous Transport Promotion and Recombination Suppression in Perovskite Solar Cells by Defect Passivation with Li-Doped Graphitic Carbon Nitride

“…Given the strong coordination interaction between the N of CN and the surface undercoordinated Pb ions of perovskite, the trap state density is significantly reduced through the CN or CN-Li treatment, which further gives rise to the suppressed charge trapping and nonradiative recombination. Moreover, as an n-type dopant, the existence of Li can increase the electron density of the CN host, which further enhances the electron-donating ability of CN and promotes the trap state passivation effect. , On the other hand, the CN framework may participate in charge transport; however, its terrible interlayer carrier mobility decreases the charge transport kinetics. In our case, the intrinsic CN is replaced with its Li-doping counterpart, whereupon the interlayer charge transport is remarkably ameliorated as a result of the strengthened interlayer interaction and the increased carrier mobility by the Li + dopant.…”

Numerical investigation of eco-friendly MASnI3 perovskite-based solar cell: effect of defect density and hole transport layer

“…The diffusion length L n,p depended upon the product of diffusion coefficient and carrier lifetime. The relation is given in equation (8).…”

“…Perovskite solar cells (PSCs) have aroused a huge attention in the areas of materials, chemistry, and physics due to their interesting optoelectronic properties such as: a high photo potential production capacity even with significant structural defects [1], a tunable band gap [2], high light absorption coefficient [3], a long diffusion length [4] a low charge recombination rate [5], and a high mobility of the carriers [6], and a high photo-conversion efficiency (PCE) [7,8]. The tin halide perovskite CH 3 NH 3 SnI 3 (MASnI 3 ) was initially published as solar cell absorbers in 2014 by Noel and his team.…”

The influence of compression on the lattice stability of α-FAPbI3 revealed by numerical simulation

“…Even worse, other factors aggravate this problem, such as water moisture [14][15][16] and residue tensile strain in the perovskite films. 12,[17][18][19] Much effort has been devoted to resolving the moisture problem, including doping, 20,21 encapsulation, 22 and interface engineering. 23,24 Among the trials, an important step forward was achieved recently, when a stable hydrate phase of FAPbI 3 was discovered, 14 providing an effective solution to this problem, which leaves residue tensile strain as the only challenge remaining.…”