I replace the battery of my phone, now what?

Post author:Jesús Capistrán
Post published:February 1, 2020

Last week I was talking about "DIY Culture: Repair and Recycle" where I show you the way I found to replace an old iPhone 6 and keep using it for a while in 2020. But now, there is still a problem. What I should do with the used battery? The answer is to trash it, but correctly. Here, I will show you how to do it and what more we can learn from this technology. Li-ion battery is a highly recycle technology, but if you trash it the common way there is a potential risk for fire or burning. Why?…

How a Silicon Heterojunction solar cell is made? MRS SciVid-2017 (winner)

Post author:Jesús Capistrán
Post published:January 23, 2020

Looking for PV-Lab (Photovoltaic Labs ) on the web I found this video which explains the process of the development of silicon (Si) solar cells. It seems interesting so I want to share it with you. The most efficient silicon solar cells in 2020 are developed using Si-heterojunctions (26.7% lab and 24.4% module) [1]. The junction is formed between the crystalline silicon (Eg = 1.12 eV ) and amorphous silicon (Eg = 1.75 eV) deposited on each face of the wafer. This difference in energy gaps gives the name heterojunction to this technology. https://youtu.be/tzQw1e0gP_4 How a silicon solar cell (2017)…