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https://hdl.handle.net/2440/133722
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Type: | Journal article |
Title: | Quasi-solid-state self-assembly of 1D-branched ZnSe/ZnS quantum rods into parallel monorail-like continuous films for solar devices |
Author: | Chen, D. Zhang, H. Miyazawa, K. Kojima, R. Zhang, P. Yang, L. Sun, Q. Shao, G. Fukuma, T. Gao, Y. Nguyen, N.T. Raston, C.L. Jia, G. Zhao, D. Prasad, P.N. Wang, S. Li, Q. |
Citation: | Nano Energy, 2021; 89:106348-1-106348-12 |
Publisher: | Elsevier |
Issue Date: | 2021 |
ISSN: | 2211-2855 2211-3282 |
Statement of Responsibility: | Dechao Chen, Huayang Zhang, Keisuke Miyazawa, Ryohei Kojima, Peng Zhang, Lei Yang, Qiang Sun, Guosheng Shao, Takeshi Fukuma, Yongsheng Gao, Nam-Trung Nguyen, Colin L. Raston, Guohua Jia, Dongyuan Zhao, Paras N. Prasad, Shaobin Wang, Qin Li |
Abstract: | Translating the extraordinary optoelectric properties of colloidal quantum rods (QRs) into functional devices requires multiscale structural control to preserve the nanoscale attributes as well as to introduce micro- and macroscale interactions between the building blocks. Self-assembly of anisotropic QRs into ordered nanostructures can tailor the photoelectric properties of the QRs, such as in light absorption, and charge separation and transfer. However, it remains a challenge to assemble anisotropic nanomaterial into centimeter-sized, multilayered continuous films that retain nanoscale properties in the fabricated macroscopic devices. We have developed a quasi-solid-state self-assembly of randomly oriented nanostructures for overcoming this challenge, demonstrated by the re-assembly of randomly packed ZnSe/ZnS QRs into aligned and ordered parallel monorails (PMs). These ZnSe/ZnS PMs show significant enhancement in photo-excited charge transport, boosting photocatalytic oxygen evolution rates and the enhancement of photoelectrochemical activities, with a photocurrent density of 18 μA/cm2 , 5 times higher than the parent random packing of ZnSe/ZnS QRs. The ZnSe/ZnS PMs enrich the p-n heterojunctions, which can modulate charge carrier separation and transport at the interfaces. The new method has applicability for re-assembling randomly packed films of anisotropic nanoparticles into ordered nanostructures. Importantly, the extraordinary photoelectro-energy conversion behavior of the Type-I core/shell quantum materials illuminates the pathways for novel designed materials by tailoring the hierarchical structures at all scales. |
Keywords: | Quantum rods; Self-assembly; P-N heterojunction; Core/shell structure; Water oxidation; Solar energy conversion |
Rights: | © 2021 Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.nanoen.2021.106348 |
Grant ID: | http://purl.org/au-research/grants/arc/180100002 http://purl.org/au-research/grants/arc/DP200101105 http://purl.org/au-research/grants/arc/DE160100589 http://purl.org/au-research/grants/arc/DP190103548 |
Published version: | http://dx.doi.org/10.1016/j.nanoen.2021.106348 |
Appears in Collections: | Chemical Engineering publications |
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