In material processing, a laser system with optimal laser parameters has been considered to be significant. Especially, the laser scribing technology is thought to be very important for fabricating DSSC(Dye sensitized solar cell) modules with good quality. Moreover, the TEM00 mode laser beam is the most dominant factor to decide the IPCE(Incident photon to current conversion efficiency) characteristics. In order to get the TEM00 mode, a pin-hole is inserted within a simple pulsed Nd:YAG laser resonator. And the spatial field distribution is measured by using three size pin-hole diameters of 2.0, 6.0 mm respectively. At that moment, each case has the same laser beam energy by adjusting the discharge voltage and pps(pulse per second). From those results, it is known that the pin-hole size of 2.0 mm has the perfect TEM 00 mode. In addition, at the charging voltage of 1000 V, 10 pps and the feeding speed of 1.11 mm/sec, the SEM photo of FTO(Fluorine-doped tin oxide) thin film layers shows the best scribing trace.
|Number of pages
|Transactions of the Korean Institute of Electrical Engineers
|Published - Aug 2008
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering