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← ScienceWhich risk increases when an LED's band gap narrows?
A)Increased device thermal runaway✓
B)Stimulated emission rate decrease
C)Increased reverse leakage current
D)Minority carrier lifetime increase
💡 Explanation
Increased heat generation induces further band gap narrowing, causing increased current. Therefore, increased thermal runaway risk occurs rather than reduced current, because positive feedback escalates due to the increased electron-hole recombination and phonon generation initiating thermal runaway.
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