Which phenomenon causes decreased efficiency in silicon photovoltaic cells?

💡 Explanation

Efficiency lowers because silicon's indirect band gap necessitates phonon involvement for momentum conservation during photon absorption, reducing electron-hole pair generation using band to band transition rather than direct excitation, therefore limiting obtainable power.

• Which risk increases when operating a multi-strand superconducting cable near its critical current?
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• Which equilibrium shift occurs due to temperature change?
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