Sun Xinyu, Azad Fahad, Wang Shuangpeng, Zhao Lingzhi, Su Shichen
Institute of Optoelectronic Material and Technology, South China Normal University, Guangzhou, 510631, People's Republic of China.
School of Natural Sciences (SNS), National University of Science and Technology (NUST), H-12, Islamabad, Pakistan.
Nanoscale Res Lett. 2018 Sep 10;13(1):277. doi: 10.1186/s11671-018-2701-4.
With the advent of wearable device technology, fabrication of inorganic semiconductor devices on flexible organic substrates is of great interest. In this paper, a fascinating method and a low-cost flexible substrate material polyvinyl alcohol (PVAL) have been utilized to embed ZnO microwire (MW) array to produce ultraviolet (UV) photodetector (PD) with decent photoresponsivity. The flexible PVAL substrate is relatively cheap and has better bendability as compared to polyethylene terephthalate (PET) and other traditional flexible substrate materials, which makes it unique in comparison to traditional devices. The device shows a current photoresponsivity of 29.6 A/W in the UV spectral range (350 to 380 nm) and maintains an excellent detection performance with even a bending angle of 180°. In dark, a low current of 1.4 μA at 5 V bias and response time of 4.27 ms was observed. In addition to the excellent device performance at wide bending angles, the fabricated device also performs well with the bending radii close to 0. Therefore, ZnO MW array PD has a great potential for the real-time monitoring of harmful UV exposure to warn the users for the appropriate arrangement avoidance.
随着可穿戴设备技术的出现，在柔性有机基板上制造无机半导体器件引起了人们的极大兴趣。在本文中，一种引人入胜的方法和一种低成本的柔性基板材料聚乙烯醇（PVAL）被用于嵌入ZnO微线（MW）阵列，以生产具有良好光响应性的紫外（UV）光电探测器（PD）。与聚对苯二甲酸乙二酯（PET）和其他传统柔性基板材料相比，柔性PVAL基板相对便宜且具有更好的可弯曲性，这使其与传统器件相比具有独特性。该器件在紫外光谱范围（350至380nm）内的电流光响应率为29.6A/W，即使在180°的弯曲角度下也能保持出色的检测性能。在黑暗中，在5V偏压下观察到低电流为1.4μA，响应时间为4.27ms。除了在宽弯曲角度下具有出色的器件性能外，所制造的器件在弯曲半径接近0时也表现良好。因此，ZnO MW阵列PD在实时监测有害紫外线暴露以警告用户进行适当的防护安排方面具有巨大潜力。
