Hello respected experts. Could you please let me know, What are the vertical lines on small solar panels and what do it do?
And what is the difference between line on the center and line on the side.

 

Hello,

Read the following page:
https://electricalengineering123.com/solar-cell-construction-working-principle/

Bertus

 

What are the vertical lines on small solar panels and what do it do?

Solar cells are made up of multiple cells connected in series and/or parallel. The metal connects the individual cells.

And what is the difference between line on the center and line on the side.

Metal configuration depends on how the individual cells are arranged.

Something I found interesting when I was an R&D technician back in the 1970's, and I was decapping transistors and integrated circuits to learn more about them, is that silicon transistor junctions acted like photovoltaic devices when exposed to light. I worked with a tech who was characterizing some GaAs logic devices we were prototyping and he had to cover them to deal with light affecting measurements while he was probing wafers.

 

Most of my Solar Garden Lights use a 1.8V solar panel with four groups of 0.45V and a metallic line exactly like yours. They feed through a 0.3V Schottky diode to charge the 1.4V Ni-MH battery cell.

 

The small lines are metal strips to collect electrons freed up by the light striking the cell. There are a number of them so electrons don't have to travel far across the cell which reduces electrical resistance.

The thicker vertical lines are heavier conductors to carry the electrons from a number of thinner lines.

The heavy conductor in the middle gives electrons a shorter path than the one over on the side, but the trade-off is that it blocks light from the centre of the cell.

 

Solar cells are made up of multiple cells connected in series and/or parallel. The metal connects the individual cells.
Metal configuration depends on how the individual cells are arranged.

Something I found interesting when I was an R&D technician back in the 1970's, and I was decapping transistors and integrated circuits to learn more about them, is that silicon transistor junctions acted like photovoltaic devices when exposed to light. I worked with a tech who was characterizing some GaAs logic devices we were prototyping and he had to cover them to deal with light affecting measurements while he was probing wafers.

Similarly, PV panels emit long wavelength red light (visible but dim) when a voltage is applied, and LEDs produce a voltage when light exposed to light.

 

Solar cells are made up of multiple cells connected in series and/or parallel. The metal connects the individual cells.
Metal configuration depends on how the individual cells are arranged.

Something I found interesting when I was an R&D technician back in the 1970's, and I was decapping transistors and integrated circuits to learn more about them, is that silicon transistor junctions acted like photovoltaic devices when exposed to light. I worked with a tech who was characterizing some GaAs logic devices we were prototyping and he had to cover them to deal with light affecting measurements while he was probing wafers.

You could decap memory chips and actually use them as an imaging array -- not a particularly good one, but you could get very recognizable images by reading out the memory contents after exposing them to light using a simple lens system.