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Title
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Correlating structure and detection properties in HgTe nanocrystal films
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Author
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Abstract
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| HgTe nanocrystals (NCs) enable broadly tunable infrared absorption, now commonly used to design light sensors. This material tends to grow under multipodic shapes and does not present well-defined size distributions. Such point generates traps and reduces the particle packing, leading to a reduced mobility. It is thus highly desirable to comprehensively explore the effect of the shape on their performance. Here, we show, using a combination of electron tomography and tight binding simulations, that the charge dissociation is strong within HgTe NCs, but poorly shape dependent. Then, we design a dual-gate field-effect-transistor made of tripod HgTe NCs and use it to generate a planar p-n junction, offering more tunability than its vertical geometry counterpart. Interestingly, the performance of the tripods is higher than sphere ones, and this can be correlated with a stronger Te excess in the case of sphere shapes which is responsible for a higher hole trap density. |
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Language
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English
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Source (journal)
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Nano letters / American Chemical Society. - Washington
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Publication
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Washington
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2021
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ISSN
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1530-6984
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DOI
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10.1021/ACS.NANOLETT.0C04346
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Volume/pages
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21
:10
(2021)
, p. 4145-4151
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ISI
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000657242300002
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Pubmed ID
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33956449
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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