Shape Controlled Plasmonic Sn Doped CdO Colloidal Nanocrystals: A Synthetic Route to Maximize the Figure of Merit of Transparent Conducting Oxide.
Shape Controlled Plasmonic Sn Doped CdO Colloidal Nanocrystals: A Synthetic Route to Maximize the Figure of Merit of Transparent Conducting Oxide.
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DOI：
10.1002/smll.201602469
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发表时间：
2017-02
期刊：
影响因子：
13.3
通讯作者：
Sirshendu Ghosh;M. Saha;Sumana Paul;S. De
中科院分区：
文献类型：
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作者：
Sirshendu Ghosh;M. Saha;Sumana Paul;S. De
报道了通过精确调节前驱体的反应性和选择合适的封端剂合成不同各向异性形状（8种不同形状）的Sn 4+掺杂的CdO（Sn：CdO）胶体纳米晶体（NC）。在所有这些系统中，在反应的非常早期阶段确定了2-3 nm的Sn：CdO量子点（QD）的形成。胶体稳定的QD充当用于形成初级纳米颗粒的连续来源，所述初级纳米颗粒可以选择性地转化成特定类型的纳米颗粒形态。通过配体的选择，预测了面心立方结构CdO的特殊面稳定性.通过改变Sn ~（4+）掺杂浓度，可以实现等离子体吸收带的精细调谐。不同的各向异性Sn：CdO纳米粒子在近红外区域表现出有趣的形状依赖的等离子体吸收特性。在玻璃基片上沉积高质量无裂纹、均匀致密的薄膜，制备高质量的透明导电氧化物（TCO）涂层。TCO的品质因数最高可达0.523 Ω-1，电导率为43600 S cm-1，可见光透过率为1085%，远高于市售的掺锡氧化铟等透明电极。
The synthesis of different anisotropic shaped (eight different shapes) Sn4+ doped CdO (Sn:CdO) colloidal nanocrystals (NCs) by precise tuning of precursor reactivity and proper choice of capping agent is reported. In all these systems, formation of Sn:CdO quantum dots (QDs) of 2-3 nm is identified at very early stage of reaction. The colloidally stable QDs act as a continuous source for the formation of primary nanoparticles that can be transformed selectively into specific type of nanoparticle morphology. The specific facet stabilization of fcc (face centered cubic)CdO is predicted by particular choice of ligand. Fine tuning of plasmonic absorbance band can be achieved by variation of Sn4+ doping concentration. Different anisotropic Sn:CdO NCs exhibit interesting shape dependent plasmonic absorbance features in NIR region. High quality crack free uniform dense thin film has been deposited on glass substrate to make high quality transparent conducting oxide (TCO) coatings. figure of merit of TCO can be maximized as high as 0.523 Ω-1 with conductivity of 43 600 S cm-1 and visible transmittance of ≈85% which is much higher than commercially available tin doped indium oxide and other transparent electrodes.