Temperature-dependent Mn emission in codoped CsPb (BrCl) perovskite nanocrystals.

We prepared codoped CsPb(BrCl) nanocrystal (NC) films by varying the Cu/Mn molar ratio using a facile two-step solution method. The Mn emission peak is studied in the temperature range of 80-300 K. Strong electron-optical-phonon coupling causes an anomalous blueshift and linewidth broadening of the Mn emission peak with increasing temperature.

Optical properties and electronic structures of lithium doped double perovskite CsAgBiCl crystals.

Lead-free double perovskite CsAgBiX (X = Cl or Br), as an environmentally friendly alternative to lead-based perovskite, has recently received much attention due to its excellent optoelectronic properties and potential applications. In this study, Li doped CsAgBiCl crystals are synthesized by heat-assisted solution evaporation. The crystal structure characteristics, component analysis and optical performances are investigated experimentally.

Lead-free CsAgNaInBiCl perovskite films with broad warm-yellow emission for lighting applications.

Lead-free halide double perovskite CsAgInCl has been extensively studied in recent years due to the lead toxicity and poor stability of common lead halide perovskites. In this study, sodium (Na) and bismuth (Bi) doped into CsAgInCl double perovskite, then CsAgNaInBiCl films with broadband warm-yellow emissions were achieved by the blade coating method. Herein, Na and Bi content were changed as variables at a series of parameter optimization experiments, respectively.

A Review of Perovskite-Based Photodetectors and Their Applications.

Perovskite photodetectors have attracted much research and attention because of their outstanding photoelectric characteristics, such as good light harvesting capability, excellent carrier migration behavior, tunable band gap, and so on. Recently, the reported studies mainly focus on materials synthesis, device structure design, interface engineering and physical mechanism analysis to improve the device characteristics, including stability, sensitivity, response speed, device noise, etc. This paper systematically summarizes the application fields and device structures of several perovskite photodetectors, including perovskite photoconductors, perovskite photodiodes, and perovskite phototransistors.

Effect of Acupoint Hot Compress on Postpartum Urinary Retention After Vaginal Delivery: A Randomized Clinical Trial.

Importance: Acupoint hot compress during the early postpartum period may benefit patients after a vaginal delivery, but the evidence of this effect is limited.

Objective: To assess whether acupoint hot compress involving the abdominal, lumbosacral, and plantar regions could reduce the incidence of postpartum urinary retention, relieve postpartum uterine contraction pain, prevent emotional disorders, and promote lactation.

Design, Setting, And Participants: This multicenter randomized clinical trial was conducted at 12 hospitals in China.

Direct Fabrication of CsPbMn(Br,Cl) Thin Film by a Facile Solution Spraying Approach.

Nowadays, Mn-doping is considered as a promising dissolution for the heavy usage of toxic lead in CsPbX perovskite material. Interestingly, Mn-doping also introduces an additional photoluminescence band, which is favorable to enrich the emission gamut of this cesium lead halide. Here, a solution spraying strategy was employed for the direct preparation of CsPbMn(Br,Cl) film through MnCl doping in host CsPbBr material.