# Exercise 8.2-1

## Quick Questions to

### 8.2 Making Bulk Si Solar Cells

| Here are some quick questions
|  | Discuss the basic requirements for mass production of solar cells including technical constraints resulting from economical boundary conditions
|  | Describe the essential production steps of a mc-Si solar cell. Start with suitable poly-Si and discuss essential problems encountered with the solutions. Use schematic drawings.
|  | Describe "anti reflection" technologies.
|  | Compare screen-printing for the deposition of the metallic grid on a Si solar cell to other layer deposition methods. Hint: Consider that a good solar cell may deliver 5 A at 0.5 V and consider how that converts into thickness requirements of the metal grid layer. The specific resistivity rof a decent metal is about 2 µWcm, the resistance R for a cross sectional area of A cm2 and a length l is R = r · l / A.

With frame

8.2.3 Summary to: 8.2 Making Bulk Si Solar Cells

© H. Föll (Semiconductor Technology - Script)