ZnO-Paper Based Photoconductive UV Sensor
ZnO-Paper Based Photoconductive UV Sensor
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DOI：
10.1021/jp107812w
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发表时间：
2011-01-13
影响因子：
3.7
通讯作者：
Seminario, Jorge M.
中科院分区：
文献类型：
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作者：
Gimenez, Alejandro J.;Yanez-Limon, J. M.;Seminario, Jorge M.
我们建立传感器，能够检测和测量紫外线（UV）光，通过沉积氧化锌（ZnO）粉末从溶剂悬浮在普通的白色纸。虽然这些传感器易于制造并且需要廉价的材料，但它们的特性与使用复杂且昂贵的程序制造的UV传感器相似。我们的简单器件在电导率变化方面的良好性能可以归因于纸的电导率和孔隙率特性，其有效地结合了ZnO晶体。我们使用量子化学方法进行分析，以描述可能的机制，解释观察到的ZnO表面上的导电性变化，由于掺杂与间隙氢和掺杂耗尽引起的氧吸附的相互作用。
We build sensors, capable of detecting and measuring ultraviolet (UV) light, by depositing zinc oxide (ZnO) powder from a solvent suspension over common white paper. Although these sensors are easy to fabricate and require inexpensive materials, they feature characteristics similar to those of UV sensors made with complex and expensive procedures. The good performance in terms of conductivity change of our simple devices can be attributed to the conductivity and porosity properties of paper, which effectively binds the ZnO crystals. We perform analyses using quantum chemistry methods to describe possible mechanisms that explain the conductivity changes observed on the ZnO surface due to doping interactions with interstitial hydrogen and doping depletion caused by oxygen adsorption.