Artificial Synapse Based on a δ-FAPbI/Atomic-Layer-Deposited SnO Bilayer Memristor.

Halide perovskite-based resistive switching memory (memristor) has potential in an artificial synapse. However, an abrupt switch behavior observed for a formamidinium lead triiodide (FAPbI)-based memristor is undesirable for an artificial synapse. Here, we report on the δ-FAPbI/atomic-layer-deposited (ALD)-SnO bilayer memristor for gradual analogue resistive switching.

Atmospheric Humidity Underlies Irreproducibility of Formamidinium Lead Iodide Perovskites.

Metal halide perovskite solar cells (PSCs) are infamous for their batch-to-batch and lab-to-lab irreproducibility in terms of stability and performance. Reproducible fabrication of PSCs is a critical requirement for market viability and practical commercialization. PSC irreproducibility plagues all levels of the community; from institutional research laboratories, start-up companies, to large established corporations.

Effects of MgFanti-reflection coating on optical losses in metal halide perovskite solar cells.

The importance of light management for perovskite solar cells (PSCs) has recently been emphasized because their power conversion efficiency approaches their theoretical thermodynamic limits. Among optical strategies, anti-reflection (AR) coating is the most widely used method to reduce reflectance loss and thus increase light-harvesting efficiency. Monolayer MgFis a well-known AR material because of its optimal refractive index, simple fabrication process, and physical and chemical durabilities.

Enhancing Efficiency and Stability of Tin Halide Perovskite Light-Emitting Diodes via Engineered Alkali/Multivalent Metal Salts.

Sn-based perovskite light-emitting diodes (PeLEDs) have emerged as promising alternatives to Pb-based PeLEDs with their rapid increase in performance owing to the various research studies on inhibiting Sn oxidation. However, the absence of defect passivation strategies for Sn-based perovskite LEDs necessitates further research in this field. We performed systematic studies to investigate the design rules for defect passivation agents for Sn-based perovskites by incorporating alkali/multivalent metal salts with various cations and anions.

Rational Design of a Chemical Bath Deposition Based Tin Oxide Electron-Transport Layer for Perovskite Photovoltaics.

Chemical bath deposition (CBD) is widely used to deposit tin oxide (SnO ) as an electron-transport layer in perovskite solar cells (PSCs). The conventional recipe uses thioglycolic acid (TGA) to facilitate attachments of SnO particles onto the substrate. However, nonvolatile TGA is reported to harm the operational stability of PSCs.

Suppressing ion migration in metal halide perovskite via interstitial doping with a trace amount of multivalent cations.

Cations with suitable sizes to occupy an interstitial site of perovskite crystals have been widely used to inhibit ion migration and promote the performance and stability of perovskite optoelectronics. However, such interstitial doping inevitably leads to lattice microstrain that impairs the long-range ordering and stability of the crystals, causing a sacrificial trade-off. Here, we unravel the evident influence of the valence states of the interstitial cations on their efficacy to suppress the ion migration.

Multiplane Facelift Following Facial Bone Contouring for Enhanced Mobilization and Rejuvenation.

Introduction: The aging process is inevitable in life, and the social demand for rejuvenation increases by year. The face acquires both soft tissue and skeletal changes through aging, and correcting only one side has limits in natural rejuvenation. Thus, the authors combined multiplane facelift with whole-facial bone contouring for maximal results.

Long-term stable, low-temperature remote silicate phosphor thick films printed on a glass substrate.

A critical step in providing better phosphor solution for white light emitting diode (LED) is to utilize inexpensive silicate phosphors with strong thermal stability. Here, we demonstrate yellow silicate phosphor-embedded glass thick films with a high luminous efficacy of ∼32 lm/W at 200 mA as a nonconventional remote-phosphor approach. The simple screen-printing process of a paste consisting of (Ba,Sr,Ca)₂SiO₄:Eu²⁺ phosphor and a low softening point glass creates a planar remote structure on a regular soda lime silicate glass with controllable film thickness and location (top vs bottom) of the phosphor layer.

Perineal reconstruction using a bilobed pudendal artery perforator flap.

Background: To reconstruct the perineal region, including the urogenital and anal triangle that differ from each other in tissue characteristics and function, we applied pudendal artery perforator flaps with a bilobed flap design. This bilobed flap design could improve the arc of flap rotation and the mobility of the flap so it could cover wide and deep defects. Moreover, it could preserve the characteristics of each triangle.

Vomopalatoplasty: a novel procedure to reduce velopharyngeal distance in cleft palate repair.

Despite numerous improvements in the palatoplasty procedure, speech dysfunction tends to develop in many patients, requiring another surgery. In addition, vomer flaps have been used in palatoplasty in various shapes and on purposes. Nonetheless, they have been used mostly to cover the defect in wide and complete type of cleft palate.