Eco‐friendly Mn‐doped CsPbCl₃ perovskite nanocrystal glass with blue‐red emission for indoor plant lighting

Abstract

Mn‐doped CsPbCl3 perovskite nanocrystal (PeNC) glass was prepared by melt quenching and in situ crystallization. Under the protection of robust glass, PeNCs exhibit excellent moisture resistance and thermal stability. The combination effect of thermal quenching and energy transfer of exciton to Mn2+ enables its promising applications in the field of temperature sensor. Interestingly, by matching with ultraviolet chips, all‐inorganic blue‐red emitting conversion device consisting of PeNC glass was prepared for light‐emitting diodes (LEDs), which can meet the light requirements of plant growth. The cultivation results indicated that the growth of cabbages using PeNC plant cultivation LEDs was greater than those cultivated using commercial w‐LEDs (white light‐emitting diodes). Therefore, Mn‐doped CsPbCl3 PeNCs can be used as a new generation of solid fluorescent materials in the field of indoor plant cultivation LEDs.

Polar-Solvent-Free Sonochemical Synthesis of Mn(II)-Doped CsPbCl3 Perovskite Nanocrystals for Dual-Color Emission

“…Therefore, these results further confirmed that the Mn 2+ ions, which partially replaced Pb 2+ sites, had stronger chemical interactions with Cl – than Pb 2+ , partially reducing the interactions between extranuclear and core electrons in these neighboring ions (Pb 2+ and Cl – ) because Mn has lower electronegativity than Pb . The present results corroborated the previous reports on Mn 2+ ion-substituted CsPbCl 3 PNCs. ,,− The chemical composition of the Mn-doped CsPbCl 3 was further investigated from the energy-dispersive X-ray spectroscopy (EDS) measurements (Figure f) and atomic composition (pie chart) shown in the inset of Figure f and elemental composition (Figure S2) for a Mn/Pb feed ratio of 2:1. The molar ratio of Cs, Pb, Cl, and Mn in Mn-doped PNCs was 1.0:1.62:5.34:1.02.…”

“…The survey-scan XPS spectra of pristine and Mn 2+ -doped CsPbCl 3 PNCs (Figure 3a) showed the characteristic peaks of cesium (Cs: 3d), lead (Pb: 4f), chlorine (Cl: 2p), and manganese (Mn: 2p) in the synthesized samples. 19,42,48,49 The carbon (C) peak at approximately 284.8 eV was attributed to the organic ligands oleic acid (OA) and oleylamine (OLM). The narrow-scan high-resolution XPS (HR-XPS) spectra of the Cs 3d core level in Figure 3b exhibited a doublet pair (Cs 3d: 3d 3/2 and 3d 5/2 ) structure due to the spin-orbit splitting for pristine and Mn-doped CsPbCl 3 PNCs.…”

“…X-ray photoelectron spectroscopy (XPS) was performed to identify the chemical states of the elements in the pristine and Mn-doped CsPbCl 3 PNCs (Figure a–e). The survey-scan XPS spectra of pristine and Mn 2+ -doped CsPbCl 3 PNCs (Figure a) showed the characteristic peaks of cesium (Cs: 3d), lead (Pb: 4f), chlorine (Cl: 2p), and manganese (Mn: 2p) in the synthesized samples. ,,, …”

“…Chen et al demonstrated efficient blue and white LEDs using Mn-doped CsPb­(Cl/Br) 3 perovskite quantum dots . Xiang et al utilized Mn-doped CsPbCl 3 PNC glass as a red-LED for the indoor growing plants . In this study, we introduce a polar-solvent and TOP free sonochemical method to synthesize Mn-doped CsPbCl 3 PNCs using a noncoordinating and hydrophobic solvent, such as LP.…”

Self‐reduction and enhanced luminescence in transparent Mn2+‐doped mullite glass‐ceramics derived from EMT‐type zeolite

“…In addition, the emission color of Mn 2+ ions are sensitive to the surrounding crystal‐field environment as reported 12–15 : the octahedrally coordinated Mn 2+ ions emit orange to red light, while the tetrahedrally coordinated Mn 2+ ions act as green luminescent centers. With the crystallization of GC samples, the crystal field of Mn 2+ sites would be easily changed, leading to the varied emission from red to green, which makes it more difficult to controllably prepare Mn 2+ ‐doped GCs with stable red emission.…”