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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - High-Energy Ultrafast Yb-Fiber Laser System Based on a Mamyshev Regenerator
摘要： A ?exible orthogonal frequency division multiplex (OFDM)-based modulation scheme is proposed under the name of Flexible Con?gured OFDM (FC-OFDM). It enables a ?exible subband con?guration and targets a multi-service scenario, which is envisioned for future 5G networks. The proposed FC-OFDM scheme provides a good compromise between the ?lter bank multi-carrier with offset quadrature amplitude modulation and the classical cyclic pre?x-based OFDM system. The detailed system structure is illustrated in this paper, together with ef?ciency evaluations.
关键词： 5G,FBMC,?exibility,waveform,OFDM,multicarrier modulation,OQAM,multi-service
更新于2025-09-19 17:13:59
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Fully Solution Processed, Stable, and Flexible Bifacial Polymer Solar Cells
摘要： Photon capturing is an essential step for the operation of a solar cell. In this article, we develop a bifacial solar cell with characteristics of double-side photon collection, transparent appearance, mechanical ?exibility, and facile processing. The whole device was fully fabricated by a spin-coating technique. A power conversion ef?ciency (PCE) as high as 2.46% has been achieved using the most prominent photoactive material, poly(3-hexylthiophene):(6, 6)-phenyl C61 butyric acid methyl ester (P3HT:PCBM). The bifacial solar cell can retain 92% of its original PCE after 350 cyclic bending cycles at bending radii of 7.4 mm. In addition to the mechanical instability of the device, photochemical degradation is partially involved in the device operation. We believe that our device with its promising mechanical, physical, and processing features can serve as an essential power element to be integrated with other technologies for the next-generation self-powered technology.
关键词： polymer solar cell (PSCs),Bifacial solar cell,?exibility,mechanical stability,transparent device
更新于2025-09-16 10:30:52