A simple electroless plating process was employed to prepare silver-coated glass frits for solar cells. The surface of the glass frits was modified with polyvinyl-pyrrolidone（PVP） before the electroless plating proc...A simple electroless plating process was employed to prepare silver-coated glass frits for solar cells. The surface of the glass frits was modified with polyvinyl-pyrrolidone（PVP） before the electroless plating process. Infrared（IR） spectroscopy,field emission scanning electron microscopy（FESEM）, and x-ray diffraction（XRD） were used to characterize the PVP modified glass frits and investigate the mechanism of the modification process. It was found that the PVP molecules adsorbed on the glass frit surface and reduced the silver ions to the silver nanoparticles. Through epitaxial growth, these nanoparticles were uniformly deposited onto the surface of the glass frit. Silicon solar cells with this novel silver coating exhibited a photoelectric conversion efficiency increase of 0.33%. Compared with the electroless plating processes, this method provides a simple route to prepare silver-coated glass frits without introducing impurity ions.展开更多
The proliferation of electromagnetic spectrum applications and increasing integration density of electronic devices have intensified electromagnetic pollution,driving demand for advanced electromagnetic interference(E...The proliferation of electromagnetic spectrum applications and increasing integration density of electronic devices have intensified electromagnetic pollution,driving demand for advanced electromagnetic interference(EMI)shielding materials.While conductive polymer composites present promising alternatives to traditional metals,attaining both exceptional EMI shielding performance and environmental sustainability remains challenging.Here,we adopt controlled mild alkaline hydrolysis to precisely engineer the surface roughness and hydrophilicity of polylactic acid(PLA)fibers,generating optimal substrates for subsequent electroless silver(Ag)deposition.The resulting Ag/PLA conductive fibers are structured into flexible films through vacuum filtration and hot-pressing.These films demonstrate remarkable electrical conductivity of 102,270 S/m,attributed to the continuous Ag coating and three-dimensional fibrous conductive network.Despite a thickness of merely 66μm,the Ag/PLA films exhibit an ultra-high EMI shielding effectiveness(EMI SE)of 101.0 dB and a specific shielding effectiveness of 9749.4 dB·cm^(2)/g.Notably,the films maintain military-grade EMI shielding performance(>90 dB)after thermal cycling across a~300 oC temperature range and 5000 bending cycles,confirming superior durability and mechanical flexibility.By synergistically coupling biodegradable PLA with recoverable Ag,this work simultaneously achieves outstanding EMI shielding performance and environmental sustainability,providing valuable insights for developing next-generation green EMI protection materials.展开更多
文摘A simple electroless plating process was employed to prepare silver-coated glass frits for solar cells. The surface of the glass frits was modified with polyvinyl-pyrrolidone（PVP） before the electroless plating process. Infrared（IR） spectroscopy,field emission scanning electron microscopy（FESEM）, and x-ray diffraction（XRD） were used to characterize the PVP modified glass frits and investigate the mechanism of the modification process. It was found that the PVP molecules adsorbed on the glass frit surface and reduced the silver ions to the silver nanoparticles. Through epitaxial growth, these nanoparticles were uniformly deposited onto the surface of the glass frit. Silicon solar cells with this novel silver coating exhibited a photoelectric conversion efficiency increase of 0.33%. Compared with the electroless plating processes, this method provides a simple route to prepare silver-coated glass frits without introducing impurity ions.
基金support from the National Natural Science Foundation of China(Nos.U24A2074,52403045,52473044,and 52273270)the Postdoctoral Fellowship Program of CPSF(No.GZC20241106)+1 种基金the Opening Project of Robotic Satellite Key Laboratory of Sichuan Provincethe Sichuan University Postdoctoral Interdisciplinary Innovation Fund.
文摘The proliferation of electromagnetic spectrum applications and increasing integration density of electronic devices have intensified electromagnetic pollution,driving demand for advanced electromagnetic interference(EMI)shielding materials.While conductive polymer composites present promising alternatives to traditional metals,attaining both exceptional EMI shielding performance and environmental sustainability remains challenging.Here,we adopt controlled mild alkaline hydrolysis to precisely engineer the surface roughness and hydrophilicity of polylactic acid(PLA)fibers,generating optimal substrates for subsequent electroless silver(Ag)deposition.The resulting Ag/PLA conductive fibers are structured into flexible films through vacuum filtration and hot-pressing.These films demonstrate remarkable electrical conductivity of 102,270 S/m,attributed to the continuous Ag coating and three-dimensional fibrous conductive network.Despite a thickness of merely 66μm,the Ag/PLA films exhibit an ultra-high EMI shielding effectiveness(EMI SE)of 101.0 dB and a specific shielding effectiveness of 9749.4 dB·cm^(2)/g.Notably,the films maintain military-grade EMI shielding performance(>90 dB)after thermal cycling across a~300 oC temperature range and 5000 bending cycles,confirming superior durability and mechanical flexibility.By synergistically coupling biodegradable PLA with recoverable Ag,this work simultaneously achieves outstanding EMI shielding performance and environmental sustainability,providing valuable insights for developing next-generation green EMI protection materials.
