A totally phosphine-free synthesis of metal telluride nanocrystals by employing alkylamides to replace alkylphosphines for preparing highly reactive tellurium precursors
A totally phosphine-free synthesis of metal telluride nanocrystals by employing alkylamides to replace alkylphosphines for preparing highly reactive tellurium precursors
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DOI：
10.1039/c3nr03553k
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发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Yang, Bai
中科院分区：
文献类型：
--
作者：
Yao, Dong;Liu, Yi;Yang, Bai
尽管湿化学合成具有不同元素组成的高质量半导体纳米晶体（NC）的发展，但碲化物NC由于其优异的光伏和热电性能仍然是不可替代的材料。在本文中，我们证明了元素碲（Te）在一系列的烷基酰胺中的溶解，通过硼氢化钠（NaBH 4）还原在相对较低的温度下产生高反应性的前体热注入合成碲化物NC。通过选择注射温度来调节Te前体的反应性的能力允许在宽范围内控制NC尺寸。目前制备碲化物前驱体的方法简单、经济、完全不含膦，这将促进碲化物纳米材料的商业化合成和应用。
Despite the developments in the wet chemical synthesis of high-quality semiconductor nanocrystals (NCs) with diverse elemental compositions, telluride NCs are still irreplaceable materials owing to their excellent photovoltaic and thermoelectric performances. Herein we demonstrate the dissolution of elemental tellurium(Te) in a series of alkylamides by sodiumborohydride (NaBH4) reduction at relatively low temperature to produce highly reactive precursors for hot-injection synthesis of telluride NCs. The capability to tune the reactivity of Te precursors by selecting injection temperature permits control of NC size over a broad range. The current preparation of Te precursors is simple, economical, and totally phosphine-free, which will promote the commercial synthesis and applications of telluride NCs.