A novel high reflective glass-ceramic ink with Bi2Ti2O7 nanocrystals used for the photovoltaic glass backplane

Low-Temperature Fast Firing Preparation of Zn2TiO4 Crystalline Photovoltaic Glass Ink and Its Properties

“…The glass slag obtained from water quenching was ball-milled and crushed through a 200mesh sieve to obtain ZnO-B2O3-SiO2 low-melting glass (named as low-melting glass). For photovoltaic glass ink, low-melting glass is an important part, which plays a key role in its bonding with the substrate, chemical stability and reflectivity [7,9,11]. Due to its low melting temperature, good thermal stability and electrical insulation, ZnO-B 2 O 3 -SiO 2 glass systems are often used in glass surface deep processing, glass-metal sealing and other fields [12][13][14][15].…”

“…When ZnO/SiO 2 (i.e., ZnO increases and SiO 2 content decreases) is 30/36, the low reflectivity and whiteness of the sample is due to the large holes on its surface (Figure 7a), the holes could adsorb or make the light directly through the ink layer, which decreases the diffuse reflectance of the sample. With the increase in ZnO/SiO 2 , many Zn 2 TiO 4 crystals can fill the holes and grow on the surface and interstices of TiO 2 (Figure 9), which increases the reflective surface area and thus improves the whiteness and reflectance of the sample [9]. It is well known that the greater the refractive index of the samples in the same medium, the greater the reflectance of the sample [31].…”

“…However, the chemical stability of the coating is poor, which shortens the working life. It is well known that the crystal formation in the glass melt can improve the chemical stability and reflection of the coating [9,10]. To our knowledge, there are few reports about crystal formation in photovoltaic glass ink because its quick firing time and low temperature are only 5 min and 700 • C, which is in conflict with the crystal formation time and temperature.…”

“…To our knowledge, there are few reports about crystal formation in photovoltaic glass ink because its quick firing time and low temperature are only 5 min and 700 • C, which is in conflict with the crystal formation time and temperature. Recently, Jiao [9] synthesized Bi 2 Ti 2 O 7 nanocrystals by a glass crystallisation method in 6 min. However, its cost is expensive and the process is complicated.…”

“…With the increase in ZnO/SiO2 (i.e., ZnO increases and SiO2 content decreases), 40/26 and 45/21 show the diffraction peaks of Zn1.7SiO4 crystals, However, the diffraction patterns of c and d do not show obvious regular changes, which may be the reason for the crystal growth orientation or further research. ZnO as alkaline earth metal oxide can act as the intermediate oxide in the glass network structure; a small amount of ZnO addition results in the formation of [ZnO6]present outside the glass network, and as the ZnO content increases, the [ZnO4] content in the glass increases and enters the glass network structure[9]. Further increasing the ZnO/SiO2 ratio, the sharp diffraction peaks of ZnO appeared in 50/16 due to too much ZnO content.…”