Answer / Arvind Tripathi

Gold (Au) is often added to the p-n junction in solar cells and photodetectors to form a metal contact. Gold has several advantages: (1) Low resistance: Gold provides low electrical resistance, reducing losses when current flows through the device. (2) High thermal conductivity: Gold helps dissipate heat generated by the device, improving its efficiency and lifespan. (3) Stability: Gold is a stable material that does not react with other components or environmental factors, ensuring long-term performance.

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