Review of defect engineering in perovskites for photovoltaic application

Abstract

Perovskite-based devices have achieved high efficiencies in respective fields of photovoltaics and energy storage. However, intrinsic defects in the deep level of perovskite structure are both morphological and structural. But...

Enhancing the photocatalytic efficiency and stability of CsPbBr3 nanocrystals for visible-light driven aerobic diaryl thio/seleno etherification

“…The orthorhombic CsPbBr 3 perovskite, known for its heightened stability and enhanced optoelectronic performance due to minimized crystal defects, 37 has garnered significant interest. 11 f ,38 Notably, our study unveils that under aerobic conditions and in the polar solvent acetonitrile, orthorhombic DBIA–CsPbBr 3 displays superior stability compared to cubic counterparts (NBS–CsPbBr 3 , DBHT–CsPbBr 3 , and NBA–CsPbBr 3 ).…”

Temperature and pressure induced structural transitions of lead iodide perovskites

“…The tilting often leads to symmetry lowering from cubic to tetragonal to orthorhombic systems. 56 With the tolerance factor below 0.80, structures, such as ilmenite-type (FeTiO 3 ), 57 are expected to be stable, while structures with face-sharing octahedra are expected to form with a tolerance factor above 1.0. 62 In the case of hybrid perovskites, the hydrogen bonding and the order-disorder dynamics of the A-cation also play an important role in addition to the tolerance factor.…”

Exciton Dynamics and Optically Pumped Lasing in 1‐Naphthylmethylamine‐Based Quasi‐2D Perovskite Films

“…Many kinds of defects, such as atomic vacancies, interstitials, antisite substitutions, and higher dimensional defects, exist in polycrystalline perovskite films. [34][35][36][37][38][39][40] Undercoordinated Pb 2+ and Pb clusters behave as defects with deeper energy levels, while halogen and organic vacancies are shallower-energylevel defects. [36][37][38] In quasi-2D perovskite films containing many nanocrystals with different structural orders, the defects are easier to form because of the presence of a large number of nanocrystal boundaries.…”