This is great but, I couldn't grab one thing: How the minority carriers in the n side (holes) are prevented from recombining with the defect states near the anode connector by the energy barrier introduced from the ETL layer, the Schottky junction between ETL and N side CdS frankly facilitates the hole transportation through the Schottky junction Please describe it for me; I might be misunderstanding a crucial fact.
Hi Chandula, Christopher here. While the ETL forms a Schottky junction with the n side, recombination between the minority carrier hole only happens when the hole reaches the anode layer. As you can see even if the hole moves up the Schottky junction, the entry to the anode is hindered by a big piece of energy barrier in the ETL (just on the left side of the Schottky junction). A great and intuitive way to look at it is if you were to rotate your entire screen upside down and imagine these barriers as hills and valleys, and the hole as a ball, which is affected by gravity. It is usually easier to see for electrons because analogically the energy levels work in the same direction as gravity. But for holes, you need to rotate your screen to "change the direction of gravity".
Amazing video !!!
Hi Juan, Christopher here. Thank you so much for liking my content. Do share it with your friends!😃 It would help me out alot
This is great but, I couldn't grab one thing: How the minority carriers in the n side (holes) are prevented from recombining with the defect states near the anode connector by the energy barrier introduced from the ETL layer, the Schottky junction between ETL and N side CdS frankly facilitates the hole transportation through the Schottky junction
Please describe it for me; I might be misunderstanding a crucial fact.
Hi Chandula,
Christopher here. While the ETL forms a Schottky junction with the n side, recombination between the minority carrier hole only happens when the hole reaches the anode layer. As you can see even if the hole moves up the Schottky junction, the entry to the anode is hindered by a big piece of energy barrier in the ETL (just on the left side of the Schottky junction).
A great and intuitive way to look at it is if you were to rotate your entire screen upside down and imagine these barriers as hills and valleys, and the hole as a ball, which is affected by gravity. It is usually easier to see for electrons because analogically the energy levels work in the same direction as gravity. But for holes, you need to rotate your screen to "change the direction of gravity".