RSUSSH 2020
IN20-038 Nanosecond pulsed laser scribing of fluorine-doped tin oxide coated on glass substrate
Presenter: Nattawut Poowongsaroj
King Mongkut’s University of Technology Thonburi, Thailand
Abstract
Laser is a promising tool for scribing fluorine-doped tin oxide (FTO) film coated on a substrate, in which the individual unit cells have to be completely isolated for the manufacturing of perovskite solar cells. A clean cut channel without remarkable damage on and underneath the laser-scribed surface is highly desired in order to enhance the efficiency of energy conversion of the produced solar cells. This study aims at investigating the influences of laser fluence, scan speed and side of ablation on the width and depth of cut channel as well as electrical resistance between the scribed unit cells. A nanosecond pulse laser was employed to scribe a 700-nm FTO film coated on a glass substrate. According to the experimental results, the FTO film was completely isolated by the laser without causing remarkable damage when the ablation was performed through the backside of substrate. The suggested machining condition was the laser fluence of 5 J/cm2 and scan speed of 160 mm/s.
Citation format:
Poowongsaroj, N., Tangwarodomnukun, V., & Rujisamphan, N.. (2020). Nanosecond pulsed laser scribing of fluorine-doped tin oxide coated on glass substrate. Proceeding in RSU International Research Conference, May 1, 2020. Pathum Thani, Thailand.QUESTIONS & ANSWERS
1. What is the further application of your research?
2. How about the mechanism or chemical bonding of tin oxide coated on the glass substrate?
1. Does fluorine concentration effect the FTO-film property?
2.What is the proper concentration of fluorine for this experimnet?
Did you invertigate the homogenous of FTO film developed on the substrate? How?
Could you show the results and explain involving the difference between your proposed method and the conventional method?
Dear Sir or madam
1. What is the further application of your research?
Ans In this study present process completely isolated FTO film is a transparent conductive oxide used as an electrically conductive layer for the elemental in manufacturing of perovskite solar cells, touch screens, light-emitting diodes (LEDs) etc.
2. How about the mechanism or chemical bonding of tin oxide coated on the glass substrate?
Ans FTO film prepared by a spray pyrolysis method on a glass substrate, exhibited tetragonal structure (2 0 0) as the preferred orientation and polycrystalline structure.
3. Does fluorine concentration effect the FTO-film property?
Ans Fluorine concentration effect to transmission and reflection spectra of FTO films, when increase fluoride doping the transmission of FTO film in the near infrared region is decrease and reflection is increase.
4.What is the proper concentration of fluorine for this experiment?
Ans Fluorine concentration can light transmission more than 80%, may have to study this topic again in further research.
5. Did you investigate the homogenous of FTO film developed on the substrate? How?
Ans After scribing process the cut samples were annealed to promote the grain size crystallinity, can be check the homogeneity by SEM+EDS.
6. Could you show the results and explain involving the difference between your proposed method and the conventional method?
Ans At present, the FTO film has been separated by other methods. In this study present process completely isolated FTO film by nanosecond pulse laser less energy low cost, and is prevalent in industrial applications