Wissam A. Saidi

TL;DR: The atomic level picture of the phonon-assisted ultrafast mechanism revealed in this study is valuable both for the fundamental understanding of ultrafast charge carrier dynamics at vdW heterointerfaces as well as for the design of novel quasi-2D devices for optoelectronic and photovoltaic applications.

TL;DR: In this article, temperature dependent energy levels of methylammonium lead iodide were investigated using a combination of ultraviolet photoemission spectroscopy and optical spectrography, and it was shown that the valence band maximum and conduction band minimum shift down in energy by 110 and 77

TL;DR: In this article, the authors investigate the nonradiative recombination processes due to native point defects in methylammonium lead halide (MAPbI3) perovskites using ab initio nonadiabatic molecular dynamics within surface-hopping framework.

TL;DR: In this paper, the authors investigated the electrocatalytic activity toward the four-electron oxygen reduction-reaction in N-doped graphene quantum dots and found that pyridinic and graphitic nitrogen are the most active sites with overpotentials of 0.55 and 0.79-0.90 V, respectively.

TL;DR: This work uses ab initio non-adiabatic molecular dynamics to show that native point defects in β-CsPbI 3 are generally benign for non-radiative charge recombination, regardless of whether they introduce shallow or deep trap states, and proposes that strong defect tolerance is general to metal halide perovskites because they exhibit much lower bulk moduli compared to the conventional semiconductors.