Upside-down mounting LED chip electrode and preparation method thereof

The invention discloses an upside-down mounting LED chip electrode and a preparation method thereof. The upside-down mounting LED chip electrode is composed of a metal doped thin film layer, the main body of the metal doped thin film layer is made of a high-reflectivity metal material, 1-10% of the metal material with a high-work function is doped through a co-sputtering method, a P electrode formed by the metal doped thin film layer has a simple structure, has high reflectivity, can also effectively improve the light extraction rate and can also form good ohmic contact with a P-type semiconductor.