Which risk increases when gallium arsenide LEDs operate at high temperatures?

💡 Explanation

Increased temperature boosts electron-hole recombination rate, because thermal energy overcomes the band gap resulting in non-radiative transitions. Therefore, LED efficiency plummets faster, rather than shifting wavelength or quantum confinement, which exhibit minor changes due to thermal stresses.

• Which outcome regarding electronic behavior occurs when impurities narrow energy gaps?
• Which outcome results when isotopic exchange decreases tritium concentration?
• Which material property causes hysteresis losses in each magnetic cycle of a transformer core?
• Which outcome occurs when a pharmaceutical protein drug undergoes molecular aggregation during storage?
• Which outcome occurs when contaminants alter thin-film optical coatings?
• Which mechanism limits usable energy output in a continuously running combustion engine exhausting to atmosphere?