Advances in electrically driven light-emitting diodes based on lead-free metal halides

Abstract

Electrically driven light-emitting diodes (LED) display promising applications in the fields of full-color flat panel displays and high-efficiency lighting. And the core of the device is luminous materials. Currently, the...

Colloidal semiconductor nanocrystals: from bottom-up nanoarchitectonics to energy harvesting applications

“…of perovskite NCs exhibited PLQYs comparable with lead halide perovskites. 65,349 However, the maximum EQE of 5% was realized for PEA 2 SnI 4 -based PeLEDs prepared with valeric acid. 350 Recent reports demonstrated the advancement of heavy metalfree PeLEDs; however, the design rules need to be further improved to achieve performances comparable to halide perovskite PeLEDs.…”

“…350 Recent reports demonstrated the advancement of heavy metalfree PeLEDs; however, the design rules need to be further improved to achieve performances comparable to halide perovskite PeLEDs. 349 Photocatalytic/photoelectrocatalytic energy harvesting using QDs…”

Surface Ligand Engineering to Modulate the Synthesis of DJ-Type 2D Sn-Based Perovskites for Light-Emitting Diodes

“…Metal halide perovskites (MHPs) are widely embraced for their outstanding optoelectronic properties, finding applications in photovoltaics, , light-emitting diodes (LEDs), , photodetectors, fluorescence imaging, and photocatalysis data memories et al , However, the environmental concerns associated with Pb-based halide perovskites have underscored the need for research on Pb-free alternatives. − Among these, Sn-based halide perovskites have gained interest by reason for their similarities with Pb in various aspects. − Despite their promising features, MHPs face challenges in stability due to their inherent ionic structural properties, rendering them vulnerable to external factors like solvents, ultraviolet (UV) rays, temperature, humidity, and electric fields. This limitation significantly impacts the practical utilization of MHPs. , …”

Centimeter‐Sized Single Crystals of Tetrahedral Manganese (II) Halide Hybrids for Wide‐Color Gamut Backlighting Displays

“…Additionally, the toxicity and poor stability of Pb-based OHMHs also restrict their further practical development. [28,29] In response to the above problems, Mn-based OHMHs are discovered and expected to solve these difficulties. Mn 2+ has been used as an effective luminous center due to its inherent d-d transition, especially tetrahedrally coordinated Mn(II) exhibits green narrow-band emission with high PLQY, not only in the UV region but also in the blue region, which makes Mn-based OHMHs generally have outstanding green narrow-band emission suitable for backlighting displays.…”