Question

Hello.
Based on the textbook below I solved a true or false problem.
textbook:
1. Light absorption: Sunlight absorbs in the battery
2. Charge generation: Free electrons and holes are generated inside the cell by the absorbed light.
3 Charge Separation: Free electrons and holes are separated by an electric field created at the p-n junction.
4. Charge collection: free electrons move toward n-type semiconductor and holes move toward p-type semiconductor

Problem: In solar cells made of organic semiconductors, electron-hole pairs that absorb light energy are immediately separated by an electric field and collected at the electrode to form a current.

(1+2)Electron-hole pairs are created that absorb light energy.
(3)It is separated by an electric field and collected at an electrode to form a current.
The number on the front of the question is given randomly by thinking that it is the range corresponding to the textbook, but I do not know whether the answer is true or false.

Answer 1

Here ,there is the problem with the option 1 and 2 in the text book section that photon or sun light does not get absorbed in the battery and then electron and hole pair generation in the battery. This is the case of photovoltaic cell or diode. In the case of the solar cell the light is incident on the junction of the p-n junction of a junction diode, that generates the electron hole pair there, and the applied electric field prohibit them to recombine and as this diode is used in reverse bias so electron will go to p- side semiconductor and hole to n-side semiconductor.

In the case of organic photovoltaic cell the generation of electron-hole pair is same bit there some difference in the mechanism that generates it. Now the given options in the problem are correct if we are considering the photovoltaic cell. But according to give book if textbook considers the photovoltaic cell then options are correct and if book considers battery then options are wrong.