Electron-Conducting PbS Nanocrystal Superlattices with Long-Range Order Enabled by Terthiophene Molecular Linkers,ACS Applied Materials & Interfaces

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Electron-Conducting PbS Nanocrystal Superlattices with Long-Range Order Enabled by Terthiophene Molecular Linkers
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-07-03 00:00:00 , DOI: 10.1021/acsami.8b06044
Alexander André ₁ , Michelle Weber ₁ , Kai M. Wurst ₁ , Santanu Maiti ₂ , Frank Schreiber _{2,

3} , Marcus Scheele _{1,

3}

Affiliation

PbS nanocrystals are surface-functionalized with the organic semiconductor 5,5″-dithiol-[2,2′:5,2″-terthiophene] and assembled to afford hybrid nanostructured thin films with a large structural coherence and an electron mobility of 0.2 cm²/(V s). Electrochemistry, optical spectroscopy, and quantum mechanical calculations are applied to elucidate the electronic structure at the inorganic/organic interface, and it is established that electron injection into the molecule alters its (electronic) structure, which greatly facilitates coupling of the neighboring PbS 1S_e states. This is verified by field-effect and electrochemically gated transport measurements, and evidence is provided that carrier transport occurs predominantly via the 1S_e states. The presented material allows studying structure–transport correlations and exploring transport anisotropies in semiconductor nanocrystal superlattices.

中文翻译：

噻吩分子连接体实现的长程电子导电PbS纳米晶超晶格

将PbS纳米晶体用有机半导体5,5“-二硫醇-[2,2'：5,2”-对噻吩]表面官能化，并组装以提供具有大结构相干性和0.2 cm电子迁移率的杂化纳米结构薄膜² /（V s）。应用电化学，光谱学和量子力学计算来阐明无机/有机界面处的电子结构，并且确定电子注入分子会改变其（电子）结构，这极大地促进了相邻PbS 1S _e的耦合状态。这已通过场效应和电化学门控传输测量得到了验证，并提供了证据表明载流子传输主要通过1S _e进行。状态。提出的材料可以研究结构-传输相关性，并探索半导体纳米晶体超晶格中的传输各向异性。

更新日期：2018-07-03

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