Moisture-induced phase transition and emission color change for lead-free manganese (II)-Based halide perovskite crystals with greatly improved photoluminescence quantum yield

Strong Magnetically‐Responsive Circularly Polarized Phosphorescence and X‐Ray Scintillation in Ultrarobust Mn(II)–Organic Helical Chains

“…This contrasts to 4-coordinated Mn(II) emitters, which are sensitive to water. [38][39][40][41] According to TGA/DTG and DSC data (Figure 2b; Figure S9, Supporting Information), polymers SS/RR-1 reveal impressively high stability, remaining unchanged up to 392 °C. The data from temperature-dependent powder X-ray diffractometry and emission spectroscopy (Figure S8, Supporting Information) also confirm the enchanted thermal stability of polymers SS/RR-1 (for more details, see Section S10, Supporting Information).…”

Temperature-Induced Reversible Photoluminescence Switching and Ultraviolet-Pumped Light-Emitting Diode Applications of a Perovskite (C6H10N2)2MnCl6·2H2O Crystal

“…Therefore, Mn 2+ with 3d 5 configuration has drawn great interest because of its low toxicity, low cost, and abundant storage. Subsequently, a series of organic–inorganic hybrid Mn 2+ -based perovskites with excellent photophysical properties have been discovered recently, − which demonstrate considerable application prospects in lighting and display fields. − More interestingly, temperature can induce some meaningful photophysical behaviors in Mn-based halides; for example, perovskites CsPb x Mn 1– x Cl 3 and DMAMnBr 3 (DMA + = dimethylamine) and nonperovskites C 4 H 14 N 2 MnBr 4 , (TMS) 2 MnBr 4 (TMS = trimethylsulfonium), TMAMnCl 3 (TMA = tetramethylammonium chloride), and (C 5 H 8 N 2 ) 2 MnCl 4 present a reversible PL change before and after the phase transition temperature. ,− Meanwhile, reversible PL transformations were also observed in organic–inorganic hybrid nonmanganese photoluminescent materials, − such as Cs 2 InBr 5 ·H 2 O, ( t -BA) 2 Cu 2 I 4 ·H 2 O, Rb 2 ScCl 5 ·H 2 O, and (MTP) 6 SbBr 6 Sb 2 Br 9 ·H 2 O, which were usually accompanied by the absorption/loss of crystalline water in the process of thermal treatment. − Nevertheless, temperature-induced reversible PL transformation in Mn-based perovskites that contain crystalline water in their structure is rare. Excitingly, in this work, we discovered that 0D (C 6 H 10 N 2 ) 2 MnCl 6 ·2H 2 O perovskite crystals present a temperature-induced reversible PL switching behavior without dehydration.…”

Thermal/Water-Induced Phase Transformation and Photoluminescence of Hybrid Manganese(II)-Based Chloride Single Crystals

“…Duan et al reported a humidityinduced luminescent conversion between the orange emission of octahedral coordinated DMAMnBr 3 (DMA = dimethylaminium) and green emission of tetrahedral coordinated DMA 2 MnBr 4 . 45 of highly efficient green emissive zero-dimensional (0D) manganese(II) halides. 46 These luminescent color conversions of Mn(II)-based metal halides can be directly observed by the naked eye, making Mn(II)-based hybrid halides show a bright future in detection and anticounterfeiting.…”

“…In addition, because of the moisture sensitiveness of Mn­(II)-based hybrid halides, many humidity-induced luminescent conversions were reported. Duan et al reported a humidity-induced luminescent conversion between the orange emission of octahedral coordinated DMAMnBr 3 (DMA = dimethylaminium) and green emission of tetrahedral coordinated DMA 2 MnBr 4 . Sun et al designed a new type of rewritable paper based on the humidity-induced luminescent conversion of highly efficient green emissive zero-dimensional (0D) manganese­(II) halides .…”