Extremely emissive Sb3+-doped 0D cesium indium chloride nanocrystals with switchable photoluminescence

Graphical summary. Credit score: Nano Right now (2022). DOI: 10.1016/j.nantod.2022.101460

All-inorganic lead-free luminescent steel halide nanocrystals (NCs) are essential in optoelectronics, however their functions are restricted by the low photoluminescence (PL) effectivity. It’s an efficient method by way of ns2-metal ions doping for tailoring the optical properties of steel halide NCs and increasing their functions.

Nevertheless, the PL origin of ns2-metal ion doped steel halides stays controversial and never effectively understood. Furthermore, the managed synthesis of Sb3+-doped 0D In-based halide NCs and the scale impact on the optical properties and excited-state dynamics stay unexplored.

In a research revealed in Nano Right now, the analysis group led by Prof. CHEN Xueyuan from Fujian Institute of Analysis on the Construction of Matter (FJIRSM) of the Chinese language Academy of Sciences (CAS) reported the managed synthesis of Sb3+-doped 0D Cs3InCl6 NCs with tunable sizes and investigated the impact of NC dimension on the optical properties and excited-state dynamics of Sb3+.

The researchers obtained 0D Cs3InCl6: Sb3+ NCs with tunable sizes by the managed synthesis based mostly on a HCl hot-injection methodology. The as-synthesized NCs exhibit vibrant inexperienced PL with a broad emission band.

They comprehensively surveyed the results of NC dimension and Sb3+ focus on the digital buildings and PL properties of the NCs and the excited-state dynamics of Sb3+ by way of temperature-dependent steady-state and transient PL and ultrafast femtosecond transient absorption (fs-TA) spectroscopies.

Owing to the robust electron-phonon coupling of Sb3+ within the spatially confined 0D construction of Cs3InCl6, Sb3+ ions skilled a dynamic Jahn-Teller distortion within the 3P1 excited state and an off-center place within the 1S floor state, which resulted in intense broadband emission of Sb3+ from the inter-configurational 3P11S transition with a big Stokes shift and a excessive PL quantum yield (QY) of 52.3%.

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Moreover, benefiting from the hydroscopicity of the NCs, the researchers demonstrated the water-triggered chemical transformation of the NCs from green-emitting Cs3InCl6: Sb3+ to orange-emitting Cs2InCl5·H2O: Sb3+ with a PLQY as much as 75.3%, thus revealing the prevalence of the Sb3+ luminescence in steel halide NCs.

These findings present basic insights into the excited-state dynamics of Sb3+ in 0D In-based halide NCs, thereby laying a basis for future design of novel lead-free steel halide NCs with tunable construction and switchable PL via ns2-metal ion doping or alloying in direction of versatile functions corresponding to luminescent chemosensors.


Cu+ doping enhances self-trapped exciton emission in alloyed Cs2(Ag/Na)InCl6 double perovskite


Extra data:
Zhongliang Gong et al, Extremely environment friendly Sb3+ emitters in 0D cesium indium chloride nanocrystals with switchable photoluminescence via water-triggered structural transformation, Nano Right now (2022). DOI: 10.1016/j.nantod.2022.101460

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Chinese language Academy of Sciences

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Extremely emissive Sb3+-doped 0D cesium indium chloride nanocrystals with switchable photoluminescence (2022, Might 19)
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