Abnormal spatial heterogeneity governing the charge-carrier mechanism in efficient Ruddlesden–Popper perovskite solar cells

Abstract

Layered Ruddlesden–Popper perovskite (RPP) photovoltaics have gained substantial attention owing to their excellent air stability. However, their photovoltaic performance is still limited by the unclear real-time charge-carrier mechanism of operating...

Photoinduced Cross Linkable Polymerization of Flexible Perovskite Solar Cells and Modules by Incorporating Benzyl Acrylate

“…Photovoltaic devices based on organic-inorganic halide perovskites have drawn tremendous attention owing to their superb optoelectronic characteristics and low manufacturing cost. [1][2][3][4][5][6] hydrophobic insulating materials (e.g., poly(methyl methacrylate), [45] polystyrene, [46] and poly(ethylene oxide) [47] ) is another approach to inhibit ion migration and prevent moisture invasion. Nonetheless, PSCs with solution processed insulating polymers compromise charge transfer and transport due to the difficulty of control over the accurate thickness.…”

“…Photovoltaic devices based on organic‐inorganic halide perovskites have drawn tremendous attention owing to their superb optoelectronic characteristics and low manufacturing cost. [ 1–6 ] In the past decade, based on the profound understanding of its optoelectronic conversion mechanism and the development of advanced film‐modification/architecture‐design strategies, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has increased from 3.8% to a certified 25.7%. [ 7–13 ] Instead of rigid photovoltaics, flexible perovskite solar cell (F‐PSC) has a unique advantage of the agile architecture and facile integration.…”

Complementary Triple-Ligand Engineering Approach to Methylamine Lead Bromide Nanocrystals for High-Performance Light-Emitting Diodes

“…Colloidal metal halide perovskite nanocrystals (NCs) have drawn attention in the past few years due to their ideal optical properties. − They were considered as promising emitting materials for next-generation solid-state light-emitting and high-resolution displays. − Due to the large surface-area-to-volume ratio, the ligands capped on the small-sized NCs surface are indispensable to control and optimize the performance of NCs and the related optoelectronic devices. − During the synthesis process, surface ligands play a vital control role in determining the size, shape, and defects of NCs. Therefore, it will significantly affect the optical properties, such as photoluminescence quantum yield (PLQY), Stokes shift, etc. − In addition, for light-emitting diode (LED) devices, ligands also govern the characteristics of interfaces between NCs films and carrier transport layers and further control the charge carrier transport properties and even electronic band alignment. − Different ligand engineering strategies have been proposed in the past few years to improve perovskite NCs and accelerate related devices.…”

Highly efficient and stable perovskite solar cells enabled by low-dimensional perovskitoids

“…Another widely used strategy is to use alkylammonium halide salts, which can be used to synthesize photoactive 2D perovskites with PbI 2 . Therefore, they can bound strongly with the 3D perovskite surface, forming an ultrathin (quasi-)2D "sheet" to passivate both cation and anion defects (20)(21)(22)(23)(24)(25). However, the results from using this approach are not completely satisfactory due to the tendency of forming multicomponent structures in the quasi-2D phase and creating lattice strain during the formation of low-dimensional (LD) structures.…”