1. A thin-film white LED chip, comprising a transparent substrate, a first transparent electrode, an emissive structure, a second transparent electrode, and a first phosphorescent/fluorescent layer respectively arranged in sequence, wherein the emissive structure comprises an emissive layer, an electron injection layer and a hole injection layer respectively formed at both sides of the emissive layer, and a total thickness of the electron injection layer and the second transparent electrode or a total thickness of the hole injection layer and the second transparent electrode is smaller than a length of one emission wavelength of the emissive layer;