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N-Bromosuccinimide as Bromide Precursor for Direct Synthesis of Stable and Highly Luminescent Green-Emitting Perovskite Nanocrystals
ACS Energy Letters ( IF 19.3 ) Pub Date : 2019-12-06 , DOI: 10.1021/acsenergylett.9b02363
Sumanta Paul 1 , Anunay Samanta 1
Affiliation  

Stable green-emitting perovskite nanocrystals (NCs) with general formula APbBr3, exhibiting a high photoluminescence quantum yield (PLQY), narrow bandwidth, and adjustable PL in the 510–535 nm region are coveted materials for optoelectronic applications. A generic method of obtaining both hybrid and all-inorganic perovskite NCs with the desired characteristics is, however, lacking. Herein, we report a methodology for the synthesis of CsPbBr3, FAPbBr3, and MAPbBr3 NCs employing N-bromosuccinimide as the bromide precursor. The NCs show uniform size distribution, PL maxima between 512 and 531 nm, near-unity PLQY with a fwhm of 18–22 nm, and remarkable stability in ambient conditions, in the presence of water and under UV irradiation. Not only do these exceptional characteristics of the NCs indicate their high potential in real applications, but this new methodology may also open new vistas for direct synthesis of other perovskites with high PLQY and stability without resorting to any additional postsynthesis treatment.

中文翻译:

N-溴代琥珀酰亚胺作为溴化物的前体,用于直接合成稳定且高度发光的绿色发光钙钛矿纳米晶体

通式A PbBr 3的稳定发绿钙钛矿纳米晶体(NCs),在510-535 nm区域具有高光致发光量子产率(PLQY),窄带宽和可调节PL,是光电子应用领域中令人垂涎的材料。但是,缺乏获得具有所需特性的杂化钙钛矿和全无机钙钛矿NC的通用方法。在这里,我们报告了使用N合成CsPbBr 3FA PbBr 3MA PbBr 3 NC的方法学-溴代琥珀酰亚胺作为溴化物的前体。NC显示出均匀的尺寸分布,PL最大值在512和531 nm之间,接近统一的PLQY,fwhm为18–22 nm,并且在环境条件下,有水和紫外线照射下均具有显着的稳定性。NC的这些优异特性不仅表明它们在实际应用中的巨大潜力,而且这种新方法还可能为直接合成具有高PLQY和稳定性的其他钙钛矿提供新的前景,而无需诉诸任何额外的后合成处理。
更新日期:2019-12-06
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