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Solution-Processed Inorganic Perovskite Flexible Photodetectors with High Performance
摘要： All inorganic CsPbI3-xBrx perovskites have been widely used in photodetectors due to their excellent optoelectronic properties and simple preparation processes. Here, high-performance flexible photodetectors based on inorganic CsPbI3-xBrx perovskites are demonstrated, which are achieved by a modified solution-processed method. When biased at a low voltage of 10 mV, the device yielded fast response speeds (90 μs /110 μs for CsPbI2Br PDs and 100 μs/140 μs for CsPbIBr2 PDs), a high on/off ratio of 104, and a high detectivity about 1012 Jones. Meanwhile, the devices showed outstanding environmental stability and mechanical flexibility. The periodic I-t curves had negligible fluctuation (< 5%) after storing in air atmosphere for 30 days or bending for 100 times. The results indicate that CsPbI3-xBrx perovskites have great potential in photodetection areas and pave the way to achieve high-performance flexible PDs.
关键词： Mechanical flexibility,Environmental stability,Low bias voltage,CsPbI3-xBrx-based flexible PDs
更新于2025-09-11 14:15:04
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[Lecture Notes in Electrical Engineering] Microelectronics, Electromagnetics and Telecommunications Volume 521 (Proceedings of the Fourth ICMEET 2018) || Design and Simulation of a MIM Capacitor Type RF MEMS Switch for Surface Radar Application
摘要： A Dielectric on Metal (DOM) capacitor in RF MEMS capacitive parallel switches which are generally used for microwave and radar applications in media transmission field, encounter the evil impacts of genuine drawbacks. By the surface repulsiveness of the dielectric layer, there will diminish in the downstate capacitance, in this manner a basic move is found in the deafening repeat. This impediment can be proficient by changing DOM change to a MIM switch that is putting away a thin layer of skimming metal on the dielectric layer. In MIM switch the major factor achieved that is the flexibility in working repeat. The equipotential thought of the coasting metal is suitably utilized and a framework is proposed in this paper. Without a change in the assistant model, the deafening repeat can be varied by changing the length of the skimming metal in case of this MIM change when stood out from a DOM switch. By this blueprint, we can finish the switch working at different frequencies on a comparative wafer. The uneasiness bars are used as a piece of the arrangement remembering the ultimate objective to sidestep the fastening factor. As demonstrated by the arrangement in the paper the switch is worked, duplicated, made and depicted in the K-band extent of a repeat. The most stress is found in this layout. The sketched out switch portrays a diminishment in the full repeat with respect to increase in the floating metal by researching the arrangement versatility in this paper.
关键词： RF MEMS capacitive switch,Stress,MIM switch,Design flexibility,Floating metal
更新于2025-09-10 09:29:36
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A Fully Transparent, Flexible, Sensitive, and Visible-Blind Ultraviolet Sensor Based on Carbon Nanotube-Graphene Hybrid
摘要： Transparent and flexible UV sensors have attracted considerable attention for use in portable/wearable optoelectronic systems. Although UV sensors based on photoactive nanomaterials have been reported for such applications, achieving full transparency and flexibility remains a challenge because they still rely on opaque or brittle electrodes. Here, a fully transparent, flexible, and highly sensitive UV sensor based on 1D carbon nanotubes (CNTs)–2D graphene hybrid is demonstrated. Under UV illumination, oxygen molecules on the CNT surfaces are desorbed by photoinduced plasmon energy, leading to a significant decrease in hole concentration, and correspondingly an increase in the electrical resistance of CNT. The combination of CNT and graphene minimizes the effect of contact resistance and facilitates effective charge transfer between them without potential barrier, resulting in a high photoresponse, which is 30 times as high as that of Au-electrode-based CNT sensor. Simultaneously, CNT–graphene UV sensor shows remarkable transparency (over 80% at 550 nm) and outstanding mechanical flexibility without any significant change in electrical resistance for 500 cycles at a bending radius of 5.5 mm. The integration of CNT–graphene hybrid onto flexible substrates through scalable microfabrication is expected to provide exciting opportunities for the development of high performance, optically and mechanically invisible optoelectronic devices.
关键词： contact resistance,transparency,flexibility,carbon nanomaterials,ultraviolet monitoring
更新于2025-09-10 09:29:36
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Flexibility in Multi-beam satellite antennas: Requirements, challenges and solutions
摘要： Multi-beam antennas come in a number of forms, systems and configurations. As telecommunication satellite operators look to provide service to a variety of applications, minimise risk, maximize fill rate and efficiency, flexibility has become an increasing requirement. However, with flexibility comes additional complexities and challenges. This paper looks at the requirements that are now being asked of multi-beam antennas in terms of flexibility of resources, challenges in terms of design, analysis and testing and looks into example solutions that have been found in answering such challenges. As industry looks to advanced systems that include digital processors and digital beamforming such considerations will play an increasingly important role.
关键词： VHTS,Multi-beam,antennas,flexibility,HTS
更新于2025-09-04 15:30:14