Heterovalent Doping in Colloidal Semiconductor Nanocrystals: Cation-Exchange-Enabled New Accesses to Tuning Dopant Luminescence and Electronic Impurities
Heterovalent Doping in Colloidal Semiconductor Nanocrystals: Cation-Exchange-Enabled New Accesses to Tuning Dopant Luminescence and Electronic Impurities
复制标题
胶体半导体纳米晶体中的异价掺杂：阳离子交换调节掺杂剂发光和电子杂质的新途径
DOI：
10.1021/acs.jpclett.7b00351
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发表时间：
2017
影响因子：
5.7
通讯作者：
Liu Jiajia
中科院分区：
文献类型：
--
作者：
Zhang Jiatao;Di Qumei;Liu Jia;Bai Bing;Liu Jian;Xu Meng;Liu Jiajia
在胶体半导体纳米晶体（CSNCs）中进行异价掺杂，通过提供额外的电子（n型掺杂）或额外的空穴（p型掺杂），可以提高其光学和电学性能。鉴于CSNCs的内在自净化、自猝灭和自补偿效应所带来的挑战，我们概述了CSNCs中异价掺杂的进展，特别关注掺杂剂发光和电子杂质的阳离子交换调谐。因此，在隔离的双金属的深位置中的良好定义的取代或间隙杂价掺杂已经被实现。我们还设想，新的配位体引发的阳离子交换将带来更多的杂价掺杂剂的选择。借助高分辨率的表征方法，可以清楚地确定原子特定的掺杂剂位置和分布。最后，新的应用，一些剩余的未回答的问题，以及未来的发展方向，这一领域。
Heterovalent doping in colloidal semiconductor nanocrystals (CSNCs), with provisions of extra electrons (n-type doping) or extra holes (p-type doping), could enhance their performance of optical and electronical properties. In view of the challenges imposed by the intrinsic self-purification, self-quenching, and self-compensation effects of CSNCs, we outline the progress on heterovalent doping in CSNCs, with particular focus on the cation-exchange-enabled tuning of dopant luminescence and electronic impurities. Thus, the well-defined substitutional or interstitial heterovalent doping in a deep position of an isolated nanocrystal has been fulfilled. We also envision that new coordination ligand-initiated cation exchange would bring about more choices of heterovalent dopants. With the aid of high-resolution characterization methods, the accurate atom-specific dopant location and distribution could be confirmed clearly. Finally, new applications, some of the remaining unanswered questions, and future directions of this field are presented.