Highly controllable synthesis of MAPbI3 perovskite nanocrystals with long carrier lifetimes and narrow band gap for application in photodetectors

Enhanced photoluminescence stability and internal defect evolution of the all-inorganic lead-free CsEuCl3 perovskite nanocrystals

“…Metal halide perovskite nanocrystals are being considered for application in various types of photoelectronic devices, such as light-emitting diodes, solar cells, phototransistors, and photodetectors. [1][2][3][4][5] Currently, the highly steady perovskite nanocrystals and related high-performance devices have been limited to lead containing APbX 3 (where A = MA, FA or Cs; X = halide) systems. [6][7][8][9][10] Although the photoelectronic performance of Pbbased perovskites is impressive, the toxicity of Pb is still a great hindrance for practical applications.…”

UV-Assisted Conversion of 2D Ruddlesden–Popper Iodide Perovskite Nanoplates into Stable 3D MAPbI3 Nanorods

“…After 10 h, both the absorption and PL peaks totally disappeared with a concomitant appearance of an excitonic peak at 767 nm and a PL peak near 770 nm (see Figure b,c). This absorption and PL signature have been assigned to the bulk ( n =∞) methyl ammonium lead iodide (MAPbI 3 ) structure. − The PLQY and average PL lifetime of the obtained bulk MAPbI 3 structure were measured to be 65 ± 2% and 123 ± 1 ns (27 ± 1 ns (45%) and 203 ± 1 ns (55%)), respectively (see Figure S6a of Supporting Information). The short and long lifetime components are assigned to the band-to-band recombination and surface trap-assisted recombination, respectively.…”

High‐Performance and Stable Plasmonic‐Functionalized Formamidinium‐Based Quasi‐2D Perovskite Photodetector for Potential Application in Optical Communication

“…The improved crystallinity had fewer grain boundaries and a smaller defect density, which increased photo-induced charge carrier transport and separation. [44,45] X-ray diffraction (XRD) patterns of (BA) 2 FAPb 2 I 7 perovskite films fabricated with various FACl concentrations, as shown in Figure S2a of the Supporting Information. Because the (0 2 0) crystal plane corresponding to a 4.2° peak in the XRD pattern was the preferred crystal growth plane of perovskite, that peak intensity was used to estimate the crystallinity.…”