Surface passivation of semiconducting oxides by self-assembled nanoparticles.
Surface passivation of semiconducting oxides by self-assembled nanoparticles.
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DOI：
10.1038/srep18449
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发表时间：
2016-01-13
影响因子：
4.6
通讯作者：
McConville CF
中科院分区：
文献类型：
--
作者：
Park DS;Wang H;Vasheghani Farahani SK;Walker M;Bhatnagar A;Seghier D;Choi CJ;Kang JH;McConville CF
在许多器件应用中，氧化物材料表面发生的物理化学相互作用会严重影响其性能。因此，人们试图通过几种沉积方法和许多不同的惰性材料对氧化物材料进行表面钝化。在这里，我们展示了一种新的方法来钝化多功能半导体氧化物，氧化锌(氧化锌)的表面，唤起自组装方法。这是通过热力学相变来实现的，用BeO纳米颗粒钝化氧化锌薄膜的表面。我们独特的方法包括使用BexZn1-xO(BZO)合金作为起始材料，最终获得所需的第二相BeO纳米颗粒的覆盖率，并防止热致晶格解离和缺陷介导的化学吸附，这是在未掺杂的氧化锌表面观察到的不良特征。这种表面钝化方法将允许半导体氧化物在各种不同的电子应用中使用，同时保持材料的固有性质。
Physiochemical interactions which occur at the surfaces of oxide materials can significantly impair their performance in many device applications. As a result, surface passivation of oxide materials has been attempted via several deposition methods and with a number of different inert materials. Here, we demonstrate a novel approach to passivate the surface of a versatile semiconducting oxide, zinc oxide (ZnO), evoking a self-assembly methodology. This is achieved via thermodynamic phase transformation, to passivate the surface of ZnO thin films with BeO nanoparticles. Our unique approach involves the use of BexZn1-xO (BZO) alloy as a starting material that ultimately yields the required coverage of secondary phase BeO nanoparticles, and prevents thermally-induced lattice dissociation and defect-mediated chemisorption, which are undesirable features observed at the surface of undoped ZnO. This approach to surface passivation will allow the use of semiconducting oxides in a variety of different electronic applications, while maintaining the inherent properties of the materials.