Which of the following statements about solar photovoltaic systems is NOT correc

Question

Which of the following statements about solar photovoltaic systems is NOT correct? a. Electrical current is produced when incoming photons of light have enough energy to excite electrons from valance to conduction band. b. The most common solar photovoltaic cells are built from silicon. c. A complete solar PV system includes solar module, batteries, charge controllers, inverters, wiring, and other electrical supplies. d. The junction between p and n-type silicon materials is critical for separating the charge once it's formed when a photon strikes the cell. e. Charge is carried between the fingers of the top contact of the cell when the channel (i.e., well) is made conductive by the application of voltage. f. None of these.

Explanation / Answer

d. the junction b/w p and n type silicon materials in not critical for separating the charge once its formed when a photon strikes the cell.The device is constructed in such a way that the junction can be exposed to visible light, IR, or UV. When such radiation strikes the P-N junction, a voltage difference is produced between the P type and N type materials. Electrodes connected to the semiconductor layers allow current to be drawn from the device.

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