Development of anti-soiling coating for PV cover glass using hollow silica nanoparticles |
Shivam Vishwanath, Anil Kottantharayil, Sudhanshu Mallick Centre for Research in Nanotechnology & Science, Indian Institute of Technology Bombay, Mumbai, --, India |
Hollow silica nanoparticles (HSNs) represent a compelling and versatile class of nanomaterials with a broad range of applications owing to their unique attributes. These nanoparticles, characterized by hollow silica shells, exhibit exceptional qualities that make them highly attractive in various scientific and technological fields. The synthesis of HSNs involves a multi-step procedure, with the soft template method playing a crucial role in producing monodisperse hollow silica nanoparticles. The subsequent coating is achieved through the dip coating method. The efficacy of the coating is demonstrated by a 115° contact angle and 92% average transmittance achieved within the 350-900 nm range. This combination of properties is particularly noteworthy, indicating the suitability of HSNs for applications requiring superior surface characteristics. Scanning electron microscope (SEM) analysis unveils the morphology of these nanoparticles, revealing particle sizes around 120 nm. Transmission electron microscope (TEM) further confirms the formation of hollow silica nanoparticles, with the shell thickness varying between 25 and 35 nm. Optical properties are assessed via UV−visible spectrophotometry, while surface wettability is studied through contact angle/interface system analysis. A key application of the coated material is demonstrated through its superior cleaning efficiency and transmittance compared to uncoated glass. This finding suggests potential applications in coating the cover glass of solar photovoltaic modules, where enhanced transmittance can positively impact energy conversion efficiency. Combining unique properties, efficient synthesis methods, and promising applications makes hollow silica nanoparticles a captivating area of research and development with far-reaching implications across various industries. |