Synthesis of ZnO tetrapods for flexible and transparent UV sensors
Synthesis of ZnO tetrapods for flexible and transparent UV sensors
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DOI：
10.1088/0957-4484/23/9/095502
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发表时间：
2012-03
期刊：
影响因子：
3.5
通讯作者：
S. Račkauskas;K. Mustonen;Terhi Järvinen;M. Mattila;O. Klimova;H. Jiang;O. Tolochko;H. Lipsanen;E. Kauppinen;A. Nasibulin
中科院分区：
文献类型：
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作者：
S. Račkauskas;K. Mustonen;Terhi Järvinen;M. Mattila;O. Klimova;H. Jiang;O. Tolochko;H. Lipsanen;E. Kauppinen;A. Nasibulin
在垂直流反应器中，采用空气气氛下气相氧化法合成了四脚氧化锌（ZnO-Ts）。产物的形貌随Zn分压和反应温度的变化而变化，从近球形纳米颗粒到ZnO-Ts。在合成过程中引入MgO，增加了ZnO的禁带宽度，提高了ZnO在可见光区的光学透过率，同时也改变了ZnO的T结构。所制造的柔性透明UV传感器在波长为365 nm、强度为30 μW cm−2、响应时间为0.9 s的UV照射下显示出45倍的电流增加。
ZnO tetrapods (ZnO-Ts) were synthesized in a vertical flow reactor by gas phase oxidation of Zn vapor in an air atmosphere. The morphology of the product was varied from nearly spherical nanoparticles to ZnO-Ts, together with the partial pressure of Zn and reaction temperature. MgO introduced during synthesis, increased the band gap, the optical transparency in the visible range, and also changed the ZnO-T structure. Fabricated flexible transparent UV sensors showed a 45-fold current increase under UV irradiation with an intensity of 30 μW cm−2 at a wavelength of 365 nm and response time of 0.9 s.