Effective Laser Sealing Enabled by Glass Thick Films Containing Carbon Black/Carbon Nanotubes

Abstract

An effective way of providing complete sealing of glass using an 810 nm diode laser was investigated for longer lifetime of glass panel‐based devices. Small amounts (<5 wt%) of laser‐absorbing materials such as carbon black (CB) or carbon nanotubes (CNT) were added to a bismuth zinc borate glass paste for instantaneous adhesion between glass substrates without interfacial cracks or severe pores. A higher laser power was required for a lower content of carbon for the laser‐assisted sealing of glass. As optimal compositions, the addition of 1.0 wt% CB or 0.5 wt% CNT led to complete densification of glass with higher optical transmittance. Higher absorption coefficients calculated in the CNT case, e.g., ~536.4 cm−1 for the 0.5 wt% CNT sample compared to ~277.6 cm−1 for the 0.5 wt% CB sample, are believed to be responsible for the effective sealing even with a lower content of CNT.

Multicolor emission based on amorphous-to-crystalline phase transitions in nanostructured Mn-doped glass

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Tailoring the efficient laser‐absorption‐melting behavior of Bi2O3‐B2O3‐ZnO‐Nd2O3 glass for the OLED encapsulation

“…Recently, there are much of research points on the laserabsorbing-melting bonding of the glass system such as Bi 2 O 3 -B 2 O 3 -based glass, 6,11,12 P 2 O 5 -V 2 O 3 -Fe 2 O 3 glass 13 and BaO-SrO-SiO 2 -B 2 O 3 glass-ceramics 14 and so on. However, it is often overlooked that precise spectral absorption controlling for 800∼810 nm Laser is systematically investigated by sealing glass's composition or structure design.…”