Lead-free p-type Mn:Cs3Cu2I5 perovskite with tunable dual-color emission through room-temperature grinding method

Recent progress of copper halide perovskites: properties, synthesis and applications

“…PL spectra: (d) RL intensity and PL QYs (e) under intrinsic (310 nm) and direct Mn 2+ (385 nm) excitations as a function of doping concentration of Mn-doped Cs 3 Cu 2 I 5 using a solid-state reaction method; 76 Copyright 2021 Springer Nature. (f) PL spectra of Cs 3 Cu 2 I 5 with different amounts of Mn dopant using a grinding method; 77 Copyright 2021 Springer Nature. (g) PL spectra of Cs 3 Cu 2 I 5 with different amounts of Cd dopant using a grinding method; 40 57 The resulting polarized emission was attributed to the directional transition dipole moment induced by the asymmetric crystal structure of aligned Cs 3 Cu 2 I 5 nanorods and dielectric confinement effect of the PVDF matrix.…”

“…In contrast, Wang et al developed a room-temperature doping strategy by simple grinding, which is less energy intensive for synthesizing Mn-doped Cs 3 Cu 2 I 5 (Fig. 9(f)) 77 and Cd-doped Cs 3 Cu 2 I 5 . 40 The addition of Cd dopants resulted in orange emission at ∼560 nm and can be tuned by the feeding ratio (Fig.…”

Blue Light Hazard Optimization for White Light‐Emitting Diode of Mn2+‐Activated 0D Cs3Cu2Br5 Perovskite Materials

“…For example, Mn 2+ was doped into Cs 3 Cu 2 I 5 halide under room temperature via solid–state reaction, in addition to original self‐trapped emission of Cs 3 Cu 2 I 5 at 445 nm, Mn 2+ dopant introduced characteristic emission at 550 nm and realized dual color emission tuned by feeding ratio, which implied that broadening the spectrum of Cs 3 Cu 2 Br 5 perovskite‐like derivatives could also be tuned via Mn 2+ doping. [ 41,42,43 ] More recently, lead‐doped Cs 3 Cu 2 Br 5 nanocrystals with a zero dimensional structure are prepared to facilitate stable and intrinsic white‐light emission. Most important of all, doping the Pb ions may not change the original 0D structure of Cs 3 Cu 2 Br 5 but may result in a broadband red‐light emission at 636 nm.…”

Room‐Temperature Synthesized Cd‐Doped Cs3Cu2I5: Stable and Excitation‐Wavelength Dependent Dual‐Color Emission for Advanced Anti‐Counterfeiting

“…Therefore, current reports on doped Cu‐based perovskite focus on direct calcination under high temperatures up to over 400 °C, [14] which involves only kinetic progress. Previously, our group reported Mn‐doped Cs 3 Cu 2 I 5 using the grinding method, which is kinetic, and the cation doping can occur at room temperature [15] . Cation doping successfully introduced dopant emission and proved that Cu‐based perovskite can be applied in light‐emitting applications.…”

“…Previously, our group reported Mn-doped Cs 3 Cu 2 I 5 using the grinding method, which is kinetic, and the cation doping can occur at room temperature. [15] Cation doping successfully introduced dopant emission and proved that Cu-based perovskite can be applied in light-emitting applications. However, excitons on Mn dopant energy level come completely from conduction band of Cu-based perovskite, leading to Mn photoluminescence dependent on Cu-based perovskite without exciting-wavelength dependence.…”