Day 4 - 5/21

 This morning, got in at 10:30 to have a meeting with Likai and John about scribing.

Key points were:

• 10 Micron width scribe 
• Could use a hot air gun after deposition, and then anneal to crystalize (double check this)
• Two potential methods:
• Deposit -  Vacuum - Scribe - Crystalize
• Deposit - Scribe - Vacuum - Crystalize
• Could try also mask-resist but it would be difficult to get something 10 microns wide
• Plastic and metal would be good for scribing (likely no diamond as it might puncture the FTO)
• Need to likely do most of the processes in a dry air box due to humid air

Things I need to do:

• Ask Tiziano to make some perovskites, to store them and use them when needed (make sure no bigger than what Felix can PL characterize - Asked Chaofan
• Have Felix demonstrate how to use the PL - Done
• Figure out how to do wet scribes (likely wait till John is back)
• Learn how to use the e-microscope from Sandy
• Get razor blades, scribers (metal with point essentially), pointed glass?
• Get more feedback on what the slot die coater needs (wooden box, air conditions, etc...)

In the afternoon, I learned how the PL mapping characterization works from Felix. There's some calibrations that happen and it takes quite a bit of time. The standard cell size is 25 x 15 mm.