Realization of blue-white light emission in Zn2+-doped CsCdCl3 metal halides

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 46, P. 102725 - 102725

Published: April 29, 2025

Language: Английский

Enhanced afterglow blue emissions from atomically confined excitons in Pb(II)-doped cadmium-based metal halides

Applied Physics Letters, Journal Year: 2024, Volume and Issue: 125(25)

Published: Dec. 16, 2024

All-inorganic metal halide perovskites possess significant potentiality in lighting, bioimaging, and optical anti-counterfeiting due to their exceptional unique properties. However, the exploration of efficient, robustly stable, long-persistent luminescent blue light-emitting materials poses huge challenges, especially understanding electronic structure photophysical processes. In this work, high-purity Pb2+-doped CsCdCl3 crystals were synthesized using a straightforward hydrothermal method. Parts Pb2+ ions replaced partial Cd2+ sites face-sharing octahedra formed atomically confined excitons around Pb(II) octahedra. This exciton could emit light (423 nm) at room temperature with an enhanced radiation transition probability nearly 90% quantum yield. The incorporation formation not only shifted emission color region from weak orange strong but also exhibited intrinsic afterglow behavior as perovskite. Raman spectra TL indicated polaronic states corresponding A1g 244 cm−1 phonon mode coupling electron, which dominated processes undoped doped CsCdCl3. These findings facilitate dopant dominant centers tune semiconductors, unveiling nature phenomena material, find applications devices.

Language: Английский

Recent Advances in Lead-Free All-Inorganic Perovskite CsCdCl3 Crystals for Anti-Counterfeiting Applications

Crystals, Journal Year: 2024, Volume and Issue: 14(12), P. 1077 - 1077

Published: Dec. 13, 2024

This study reviews the advanced anti-counterfeiting applications of CsCdCl3, a lead-free all-inorganic perovskite crystal exhibiting dynamic luminescent properties responsive to temperature and UV light. Using synthesis methods such as Bridgman hydrothermal techniques incorporating dopants like bromine tellurium, this research achieves improved stability, spectral diversity, afterglow characteristics in CsCdCl3. The demonstrates extended afterglow, photochromic shifts, temperature-sensitive luminescence, enabling 4D encoding for secure data encryption cold-chain monitoring pharmaceuticals. Despite these promising attributes, challenges related photostability, batch consistency, environmental resilience persist, necessitating further exploration into optimized doping strategies enhance material stability. These findings underscore potential CsCdCl3 high-security information storage, pharmaceutical anti-counterfeiting, real-time sensing, positioning it valuable next generation secure, intelligent packaging solutions.

Language: Английский