Why should the front n-layer of a c-Si solar cell be thinner than the p-layer?
A. 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.
C. Because n-doping is required to absorb the incoming light.
D. Because most of the photons are absorbed close to the front surface of the solar cell and the thickness should be smaller than the hole diffusion length in the emitter.
查看答案
Which process involves dipping a seed crystal into a molten silicon liquid and pulling it upwards at a specific rotational speed?
A. Multicrystalline ingot casting
B. Float-zone pulling
Czochralski casting
D. Silicon wire casting
Which of the following processes is used in order to fabricate monocrystalline silicon?Note that more than one correct answer is possible.
A. The Czochralski process
B. Fluid bed reactor process
C. The float-zone process
D. The Siemens process
What is the proper order, from lower purity to higher purity, of the following types of silicon?
A. Metallurgical silicon / monocrystalline silicon / polysilicon
B. Monocrystalline silicon / polysilicon / metallurgical silicon
C. Metallurgical silicon / polysilicon / monocrystalline silicon
D. Polysilicon / metallurgical silicon / monocrystalline silicon
Which of the following statements is true about monocrystalline and multicrystalline silicon?
A. SRH recombinations are more important in multicrystalline than in monocrystalline silicon.
B. Higher open-circuit voltages are obtained with multicrystalline than with monocrystalline silicon.
C. The open-circuit voltage increases as the grain size of the multicrystalline silicon absorber layer decreases.
D. The lifetime of minority charge carriers is higher in multicrystalline than in monocrystalline silicon.
微信支付 
支付宝支付