Bright Colloidal PbS Nanoribbons
Bright Colloidal PbS Nanoribbons
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DOI：
10.1021/acs.chemmater.8b00467
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发表时间：
2018-06-12
影响因子：
8.6
通讯作者：
Sun, Liangfeng
中科院分区：
文献类型：
--
作者：
Antu, Antara Debnath;Jiang, Zhoufeng;Sun, Liangfeng
使用有机金属前体和氯代烷共溶剂合成胶体硫化铅（PbS）纳米带。几个原子厚的纳米带具有典型的宽度20 nm和长度大于50 nm。与量子限制能主要由厚度决定的纳米片不同，纳米片的窄宽度对能隙的增加有额外的贡献。与纳米片相比，纳米带要亮得多。在室温下，良好钝化的纳米带在红外光谱中实现了超过30%的光致发光量子产率，与具有类似能隙的良好开发的胶体铅硫属化物量子点竞争。
Colloidal lead sulfide (PbS) nanoribbons are synthesized using organometallic precursors with chloroalkane cosolvents. The few-atom-thick nanoribbons have a typical width 20 nm and a length more than 50 nm. Different from a nanosheet where the quantum confinement energy is mainly determined by the thickness, the narrow width of the nanoribbon has an additional contribution to the increase of energy gap. In contrast to nanosheets, the nanoribbons are much brighter. At room temperatures, well-passivated nanoribbons have achieved more than 30% photoluminescence quantum yield in the infrared spectrum, competing with the well-developed colloidal lead chalcogenide quantum dots of the similar energy gap.