Down and up conversion luminescence of the lead-free organic metal halide material: (C₉H₈NO)₂SnCl₆·2H₂O

Abstract

Optical properties of hybrid organic metal halide material (C9H8NO)2SnCl6·2H2O.

Zero‐dimensional Hybrid Antimony Halide with Intrinsic Cyan Light Emission

“…To study the photoluminescent property of [HMHQ] 2 SbCl 5 • 2H 2 O, we firstly performed the solid state UV-vis absorption spectrum at 300 K. As shown in Figure S3, [HMHQ] 2 SbCl 5 • 2H 2 O shows two strong absorption peaks at 280 nm and 370 nm with cut-off wavelength of about 476 nm corresponding to a direct bandgap of 2.6 eV, which is slightly smaller than those of hydroxyquinoline derivatives based halides, such as (C 9 H 8 NO) 2 SnCl 6 • 2H 2 O (2.88 eV), (HQ) 2 ZnCl 4 (2.63 eV). [29][30] S4). [31][32][33][34] To confirm the PL nature of the cyan emission, varied wavelength dependent PLE and PL spectroscopy were preliminarily performed and no spectral difference was observed for [HMHQ] 2 SbCl 5 • 2H 2 O, corresponding to one dominant emission center in the 3D consecutive PL/PLE correlation map (Figure 3a and S5).…”

“…where I PL and I 0 represent the emission intensity at various temperatures (T) and 80 K, respectively, E a is the thermal activation energy, and k B represents the Boltzmann constant. The calculated activation energy (E a ) of 30 3e). [30,[35][36]38] To further explain the intrinsic origin of narrow cyan light emission of [HMHQ] 2 SbCl 5 • 2H 2 O, we compare the UV-vis absorption optical property of corresponding organic salt of [HMHQ]Cl, which delivers similar absorption characteristics to [HMHQ] 2 SbCl 5 • 2H 2 O indicating the same electron transition mechanism (Figure S7).…”

“…The calculated activation energy (E a ) of 30 3e). [30,[35][36]38] To further explain the intrinsic origin of narrow cyan light emission of [HMHQ] 2 SbCl 5 • 2H 2 O, we compare the UV-vis absorption optical property of corresponding organic salt of [HMHQ]Cl, which delivers similar absorption characteristics to [HMHQ] 2 SbCl 5 • 2H 2 O indicating the same electron transition mechanism (Figure S7). Subsequently, we further investigate the PL emission spectrum of precursor [HMHQ]Cl salt.…”

“…As we known, 8-hydroxyquinoline (HQ) has been reported as one kind of organic light-emitting material since 1987. [30] Especially, the metal complex based on 8-hydroxyquinoline has attracted intensive interest as luminescent material in optoelectronic application due to excellent electron transport, high fluorescence efficiency, facile assembly process and higher thermal stability, etc. [31] Inspired by the outstanding luminescent property of HQ, we herein select a HQ derivantof 2-methyl-8hydroxyquinoline (MHQ) as cationic chromophore and prepare one new 0D hybrid Sb-based halide of [HMHQ] O exhibit intense cyan emission with a relatively high PLQY of 18.92% arising from the electron transition in organic cations.…”

“…To understand how the organic cations would affect the photophysical properties of metal hybrid halides, we herein choose 8‐hydroxyquinoline (HQ) derivant as optically active molecule to design luminescent 0D hybrid metal halide. As we known, 8‐hydroxyquinoline (HQ) has been reported as one kind of organic light‐emitting material since 1987 [30] . Especially, the metal complex based on 8‐hydroxyquinoline has attracted intensive interest as luminescent material in optoelectronic application due to excellent electron transport, high fluorescence efficiency, facile assembly process and higher thermal stability, etc [31] .…”