Structure and Properties of Violet Phosphorus and Its Phosphorene Exfoliation
Structure and Properties of Violet Phosphorus and Its Phosphorene Exfoliation
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紫磷的结构与性质及其磷烯剥离
DOI：
10.1002/anie.201912761
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Zhang Jinying
中科院分区：
文献类型：
--
作者：
Zhang Lihui;Huang Hongyang;Zhang Bo;Gu Mengyue;Zhao Dan;Zhao Xuewen;Li Longren;Zhou Jun;Wu Kai;Cheng Yonghong;Zhang Jinying
黑磷烯作为一种半导体二维材料引起了人们的广泛关注。紫磷是另一种层状半导体磷同素异形体，具有独特的电子和光电性质。然而，没有得到确认的紫色晶体或可靠的紫色磷的晶格结构。目前已制备出紫磷单晶，经单晶X射线衍射分析，其晶格结构为单斜晶系，空间群为P2/n（13）（a= 9.210，b = 9.128，c =21.893 <$，β=97.776°）。 得到的晶格结构被证实是可靠和稳定的。紫磷的光学带隙约为1.7 eV，略大于计算值。 热分解温度比黑磷高52 °C，黑磷被认为是最稳定的形式。在室温条件下，通过机械剥离和溶液剥离容易地获得紫色磷烯。
Black phosphorene has attracted much attention as a semiconducting two‐dimensional material. Violet phosphorus is another layered semiconducting phosphorus allotrope with unique electronic and optoelectronic properties. However, no confirmed violet crystals or reliable lattice structure of violet phosphorus had been obtained. Now, violet phosphorus single crystals were produced and the lattice structure has been obtained by single‐crystalx‐ray diffraction to be monoclinic with space group ofP2/n(13) (a=9.210,b=9.128,c=21.893 Å,β=97.776°). The lattice structure obtained was confirmed to be reliable and stable. The optical band gap of violet phosphorus is around 1.7 eV, which is slightly larger than the calculated value. The thermal decomposition temperature was 52 °C higher than its black phosphorus counterpart, which was assumed to be the most stable form. Violet phosphorene was easily obtained by both mechanical and solution exfoliation under ambient conditions.