Abstract: The present invention provides a curable organopolysiloxane composition comprising one or more from a group including magnesium oxide, magnesium hydroxide, magnesium carbonate, hydrotalcite, hydrotalcite-like compounds, and magnesium silicate. The application of said organopolysiloxane composition in semiconductor devices of light emitting components may effectively block the permeation of hydrogen sulfide or sulfide and prevent silver-plated laminates from being oxidated without affecting the original light output efficiency, so that silver-plated laminates may be effectively protected and anti-sulfidation effect may be enhanced.