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Tunable blue-green emission from ZnS(Ag) nanostructures grown by hydrothermal synthesis

机译:水热合成生长的ZnS(Ag)纳米结构的可调谐蓝绿色发射

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We report the synthesis and optical properties of pure ZnS and Ag doped ZnS nanostructures. ZnS(Ag) was synthesized by using the hydrothermal technique and later annealed at different temperatures under vacuum conditions. It was observed that the photoluminescence (PL) emission from the ZnS(Ag) nanostructures can be easily tuned from the blue (445 nm) to green (530 nm) region of visible light by varying the annealing temperature. This tunability has been attributed to the introduction of excess sulfur vacancy states, which is evident from the PL excitation spectra. This observed change in the PL emission wavelength can be highly beneficial in the imaging screens where ZnS is regularly used and can be easily interfaced with the silicon photodiodes showing maximum sensitivity at 550 nm.
机译:我们报告了纯ZnS和Ag掺杂的ZnS纳米结构的合成和光学性质。 ZnS(Ag)通过水热技术合成,然后在真空条件下于不同温度退火。可以观察到,通过改变退火温度,可以轻松地将ZnS(Ag)纳米结构的光致发光(PL)发射光从可见光的蓝色(445 nm)调整为绿色(530 nm)。这种可调谐性归因于过量硫空位态的引入,这从PL激发光谱中可以明显看出。在定期使用ZnS的成像屏幕中,这种观察到的PL发射波长变化可能非常有益,并且可以轻松地与在550 nm处显示最大灵敏度的硅光电二极管连接。

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