Ambient Surface Stability of Thin Film Nanocrystalline Cu3SbSe4 and Structure-Property Relationships
Ambient Surface Stability of Thin Film Nanocrystalline Cu3SbSe4 and Structure-Property Relationships
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DOI：
10.1021/acsaem.8b02019
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发表时间：
2019-03-01
影响因子：
6.4
通讯作者：
Prieto, Amy L.
中科院分区：
文献类型：
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作者：
Agocs, Daniel B.;Danna, Trenton;Prieto, Amy L.
纳米晶体材料具有高表面积，因此在环境条件下可能比它们的本体对应物显著更具反应性。这可能会以非预期的方式影响器械功能。在这里，高品质的结晶Cu 3SbSe 4纳米晶体通过热注入路线合成，并通过配体交换程序沉积薄膜。暴露在空气中时，薄膜的电子传导率显著增加，高达80 Ω（-1）cm（-1）。这种电导率的增加与XPS观察到的表面氧化相关。在暴露于环境条件下的膜中观察到的变化被认为是至关重要的理解这些材料的性能，因为它们被纳入设备。
Nanocrystalline materials have a high surface area and hence may be significantly more reactive than their bulk counterparts under ambient conditions. This may affect device function in unexpected ways. Here, high-quality crystalline Cu3SbSe4 nanocrystals are synthesized through a hot injection route, and thin films are deposited through a ligand exchange procedure. The electronic conductivity of the films increases significantly upon exposure to air, up to 80 Omega(-1) cm(-1). This increase in conductivity is correlated to a surface oxidation as observed by XPS. The observed changes in the film upon exposure to ambient conditions are suggested to be critical for understanding the properties of these materials as they are incorporated into devices.