SOLAR CELL

[Anonymous No.1115291]

Hey, /diy/, quick question about this solar cell schematic:

1) What is the function of each layer?
In particularly PEDOT:PSS I'm confused by.

2) You're never actually adding a voltage source to a solar cell, right? (apart from other solar cells ofcourse) So is this just a weird way of saying the hypothetical (-) side will be negative in an open circuit and the (+) side will be positive?

[Anonymous No.1115364]

sad bump

[Anonymous No.1115386]

>>1115291
Hey anon.
I have some familiarity with solar cells...
The active layer absorbs light, generating electrons and holes (holes are positive charge carriers defined as the absence of an electron where it used to be)
The PCBM in the act. Layer is used as an electron transport material. It separates the electron from the hole in the active layer and delivers it to the neg. Contact.
Pedot:pss is a polymer that is good at transporting holes. It picks up the holes from the active layer and delivers them to the ITO, which is a transparent conductor.

Hope that helped.

[Anonymous No.1115388]

>>1115291
Also in that figure the pcbm diagram isnt quite right. In a good (organic) solar cell, the pcbm forms more or less continuous strings that lead all the way up to the top contact. In other kinds of solar cells, pcbm may be deposited as a separate layer (like the pedot pss) between the active layer and the back contact.

[Anonymous No.1115456]

>>1115386
>>1115388
That makes sense.. Thanks man