In Situ Compositing CsPbBr with Exfoliated Layered-Perovskite CsCaTaO: Interfacial Interaction and Enhanced Stability.

Cesium lead halide (CsPbX, X = Cl, Br, I) perovskite quantum dots (QDs) have been intriguing optoelectronic materials for applications in various devices owing to their superior electronic and optical properties. However, poor resistance to humidity and light irradiation impedes their promotion. Herein, bulk perovskite-type layered CsCaTaO is exfoliated into two-dimensional (2D) negatively charged CaTaO (CTO) nanosheets as seeds to in situ synthesize and composite CsPbBr.

Confining Mn-Doped Lead Halide Perovskite in Zeolite-Y as Ultrastable Orange-Red Phosphor Composites for White Light-Emitting Diodes.

CsPbX (X = Cl, Br, I) perovskite quantum dots (QDs) have emerged as competitive candidate luminescent materials in the photoelectric fields due to their superior luminescence properties. However, the major drawback such as poor resistance to temperature, moisture, and irradiation of light, especially for the red QDs with I, hinders their practical applications. Herein, we synthesized Mn-doped CsPbCl embedded in the cage of zeolite-Y as a new orange-red phosphor for the white light-emitting diode (WLED).

Waterproof Narrow-Band Fluoride Red Phosphor KTiF:Mn via Facile Superhydrophobic Surface Modification.

With unique and efficient narrow-band red emission and broadband blue light absorption characteristics, Mn-activated fluoride red phosphors have gained increasing attention in warm white LEDs (WLEDs) and liquid crystal display (LCD) backlighting applications, whereas the intrinsic hygroscopic nature of these phosphors have inevitably limited their practical applications. Herein, a waterproof narrow-band fluoride phosphor KTiF:Mn (KTF) has been demonstrated via a facile superhydrophobic surface-modification strategy. With the use of superhydrophobic surface modification with octadecyltrimethoxysilane (ODTMS) on KTF surfaces, the moisture-resistance performance and thermal stability of the phosphor KTF can be significantly improved.