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[IEEE 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) - Berlin, Germany (2019.6.23-2019.6.27)] 2019 20th International Conference on Solid-State Sensors, Actuators and Microsystems & Eurosensors XXXIII (TRANSDUCERS & EUROSENSORS XXXIII) - A High-Performance Self-Powered UV Photodetector Based on Self-Doping TIO <sub/>2</sub> Nanotube Arrays
摘要： In this paper, we present a high-performance self-powered ultraviolet (UV) photodetector using electrochemical micro-porous-channel arrays based on a cost-effective and environment-friendly black TiO2 nanotube arrays (BTNAs) and polysulfide (S2-/Sx2-) electrolyte. By self-doping TiO2 the concentration and lifetime of UV photo-generated carriers are increased due to increasing oxygen vacancies and Ti3+ defects in BTNAs, effectively enhancing the carrier transport and multiple exciton effect of carriers, and thus the self-powered UV photodetector based on electrochemical micro-porous-channel arrays demonstrates a high photoresponsivity of ~22 mA/W and high-speed photoresponse of ~4 ms in rise and decay time.
关键词： TiO2 nanotube arrays,self-powered sensors,electrochemical sensors,ultraviolet photodetector
更新于2025-09-16 10:30:52
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[Nanostructure Science and Technology] Nanowire Electronics || Nanowires for Triboelectric Nanogenerators
摘要： Currently, the personal portable electronics are powered by traditional batteries. However, as the electronic elements and power consumption increase, the power source has become an issue because it is impractical to frequently recharge or replace the batteries. Especially, for implanted and biomedical electronic systems, to replace the power sources is unrealistic. Moreover, list of the shortcomings of the conventional power sources includes not only the limited capacity but also environmental pollution and possible explosion and health hazards. Besides, the heavy and rigid boxy batteries hinder the further development of ?exible and wearable electronics and biomedical electronics. On the other way, most of the existing sensing technologies need to be pre-supported and pre-offered electrical or optical signals to sense environmental information, which inevitably requires foreign power sources. With the increased number and density of sensing networks, the sensors that can be of low-power consumption or even self-powered will be desired for future electronic modules [1–7]. TENG was ?rst invented by Zhong Lin Wang’s group in 2012 [8]. A more and deep study and discussion about TENGs can be found in another reference book [1]. Such devices utilize the conjunction of the triboelectri?cation and electrostatic induction to convert ubiquitous mechanical energy into electricity. The devices can act as ef?cient and sustainable energy converters and providers from harvesting environment low-frequency mechanical energy, such as wind, wave, river ?ow, rain drop, human body motions, and so forth [2–6, 9]. The collected energy can be converted to electric energy sources for continuously powering electronic devices and even systems [10]. Triboelectric effect is a contact-induced electri?cation in which a material turns into electrically charged after it is physically contacted with another different kind of materials. It is a natural phenomenon, and, probably, most of the people have been experiencing the triboelectric phenomena in our daily life. However, the mechanisms and availability of triboelectri?cation were seldom to be explored [11, 12].
关键词： Flexible Electronics,Nanowires,Triboelectric Nanogenerators,Energy Harvesting,Self-powered Sensors
更新于2025-09-10 09:29:36