The impact of chemical treatment on optical and electrical characteristics of multipod PbSe nanocrystal films

The impact of chemical treatment on optical and electrical characteristics of multipod PbSe nanocrystal films
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化学处理对多足 PbSe 纳米晶薄膜光电特性的影响

DOI:
10.1039/c2jm34362b
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发表时间:
2012-09
影响因子:
--
通讯作者:
Bai, Jintao
Bai, Jintao
中科院分区:
--
文献类型:
--
作者:
Song, Xiaohui;Lin, Zhonghai;Ren, Zhaoyu;Bai, Jintao

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基于不同的机理,人们成功地合成了棒状、星形和多脚状的PbSe纳米晶。通过旋涂、浸涂和平衡自组装等常用方法,纳米晶体可以用作光电子器件。其中,由于其不良的电性能,化学处理是必不可少的。在此基础上,我们研究了化学处理对旋涂多脚PbSe纳米晶薄膜的影响。讨论了不同的配体交换机制以及相邻两个PbSe纳米晶在配体交换前后的不同耦合状态。结果表明,TGA处理的薄膜具有最好的电性能。这种合适的化学处理被证明是有用的,在改善各向异性的PbSe纳米晶光电器件的性能。
PbSe nanocrystals with different shapes like rods, stars and multipods have recently been synthesized successfully based on different mechanisms. By common methods like spin-coating, dip-coating and equilibrium self-assembly, nanocrystals can be used as optoelectronic devices. Among these, it's essential to chemically treat original nanocrystal solids due to their poor electrical properties. Based on this, we investigate the impact of chemical treatment on spin-cast multipod PbSe nanocrystals films. The different ligand exchange mechanisms and different coupled states between two neighboring PbSe nanocrystals before and after ligand exchange are discussed here. The results show that TGA-treated films have the best electrical properties. This suitable chemical treatment is proved to be useful in improving the performance of anisotropic PbSe nanocrystals optoelectronic devices.
DOI: 10.1021/nn7003348
发表时间: 2008-02-01
期刊: ACS NANO
影响因子: 17.1
作者:
Luther, Joseph M.;Law, Matt;Nozik, Arthur J.
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