12.6
12.1
(a)
(b)
(c)
(d)
12.2
(a)
(b)
(c)
(d)
12.3
(a)
(b)
(c)
(d)
12.4
(a)
(b)
(c)
(d)
12.5
(a)
(b)
(c)
(d)
12.6
(a)
(b)
(c)
Exercises
Which of the following statements is true about mono- and multicrystalline silicon?
SRH recombinations are more important in multicrystalline than in monocrystalline silicon.
Higher open circuit voltages are obtained with multicrystalline than with monocrystalline silicon.
The open circuit voltage increases as the grain size of the multicrystalline silicon absorber layer
decreases.
The lifetime of minority-charge carriers is higher in multicrystalline than in monocrystalline silicon.
What is the correct order, from lower purity to higher purity, of the following types of silicon?
Metallurgical silicon / monocrystalline silicon / polysilicon.
Monocrystalline silicon / polysilicon / metallurgical silicon.
Metallurgical silicon / polysilicon / monocrystalline silicon.
Polysilicon / metallurgical silicon / monocrystalline silicon.
Which of the following processes is used in order to fabricate monocrystalline silicon? (More than one correct
answer possible.)
The Czochralski process.
The fluid bed reactor process.
The float zone process.
The Siemens process.
Which process involves dipping a seed crystal into a molten silicon liquid and pulling it upwards at a specific
rotational speed?
Multicrystalline ingot casting.
Float zone pulling.
Czochralski casting.
Silicon wire casting.
Which of the following processes is used in order to fabricate polycrystalline silicon? (More than one correct
answer possible.)
The Czochralski process.
The fluid bed reactor process.
The float zone process.
The Siemens process.
Why should the front n-layer of a c-Si solar cell be thinner than the p-layer?
The solar cell would actually have the same performance if the n-layer were thicker than the p-layer, as
long as a p-n junction is created between these two.
Because the diffusion length of the photogenerated holes is larger in the n-layer than in the p-layer.
Because n-doping is required to absorb the incoming light.
12.1
(a)
(b)
(c)
(d)
12.2
(a)
(b)
(c)
(d)
12.3
(a)
(b)
(c)
(d)
12.4
(a)
(b)
(c)
(d)
12.5
(a)
(b)
(c)
(d)
12.6
(a)
(b)
(c)
Exercises
Which of the following statements is true about mono- and multicrystalline silicon?
SRH recombinations are more important in multicrystalline than in monocrystalline silicon.
Higher open circuit voltages are obtained with multicrystalline than with monocrystalline silicon.
The open circuit voltage increases as the grain size of the multicrystalline silicon absorber layer
decreases.
The lifetime of minority-charge carriers is higher in multicrystalline than in monocrystalline silicon.
What is the correct order, from lower purity to higher purity, of the following types of silicon?
Metallurgical silicon / monocrystalline silicon / polysilicon.
Monocrystalline silicon / polysilicon / metallurgical silicon.
Metallurgical silicon / polysilicon / monocrystalline silicon.
Polysilicon / metallurgical silicon / monocrystalline silicon.
Which of the following processes is used in order to fabricate monocrystalline silicon? (More than one correct
answer possible.)
The Czochralski process.
The fluid bed reactor process.
The float zone process.
The Siemens process.
Which process involves dipping a seed crystal into a molten silicon liquid and pulling it upwards at a specific
rotational speed?
Multicrystalline ingot casting.
Float zone pulling.
Czochralski casting.
Silicon wire casting.
Which of the following processes is used in order to fabricate polycrystalline silicon? (More than one correct
answer possible.)
The Czochralski process.
The fluid bed reactor process.
The float zone process.
The Siemens process.
Why should the front n-layer of a c-Si solar cell be thinner than the p-layer?
The solar cell would actually have the same performance if the n-layer were thicker than the p-layer, as
long as a p-n junction is created between these two.
Because the diffusion length of the photogenerated holes is larger in the n-layer than in the p-layer.
Because n-doping is required to absorb the incoming light.