Large-Area Schottky Junctions between ZnO and Carbon Nanotube Fibres.,ChemPlusChem

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Large-Area Schottky Junctions between ZnO and Carbon Nanotube Fibres.
ChemPlusChem ( IF 3.0 ) Pub Date : 2018-02-09 , DOI: 10.1002/cplu.201700522
Alfonso Monreal-Bernal _{1,

2} , Juan J Vilatela ₁

Affiliation

In this study, large-area (10 cm2 ) samples of heterojunctions between zinc oxide and carbon nanotube (CNT) fibre arrays were synthesised. A two-step hydrothermal treatment was used to grow Zn nanowires (NWs) in situ directly onto the CNT array. This resulted in a bulk heterojunction that consisted of a five-micron layer of ZnO crystals in contact with the built-in CNT fabric current collector, with preferential orientation of the ZnO c axis perpendicular to the CNT sheet. The electrical properties of the heterojunction corresponded to a Schottky junction with a barrier height of 0.26 eV and an ideality factor of 2.9. Photoconductivity measurements indicated charge transfer through the ZnO/CNT interface, thus leading to a gain factor of approximately 100 and a responsivity as high as 5000 mA w-1 under UV irradiation. The resulting ZnO/CNT fibre hybrid was both piezoresistive and piezoelectric under transverse compression with an attractive format for energy-harvesting applications.

中文翻译：

ZnO和碳纳米管纤维之间的大面积肖特基结。

在这项研究中，氧化锌和碳纳米管（CNT）纤维阵列之间的异质结的大面积（10 cm2）样品被合成。使用两步水热处理将Zn纳米线（NWs）直接原位生长到CNT阵列上。这导致了体异质结，该体异质结由与内置CNT织物集电器接触的五微米ZnO晶体层组成，ZnO c轴的优先方向垂直于CNT片。异质结的电学性质对应于势垒高度为0.26 eV，理想因子为2.9的肖特基结。光电导率测量表明电荷通过ZnO / CNT界面转移，因此导致增益因子约为100，在紫外线照射下的响应度高达5000 mA w-1。

更新日期：2018-02-09

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