Patent ID: 8809673

Claim:
A stacked photovoltaic cell module, comprising: a substrate; a first electrode layer, located on the substrate; a first light absorption layer, located on the first electrode layer; a connecting layer, located on the first light absorption layer, wherein the connecting layer has a reflectivity of 10-60%; a carrier transport layer, located on the connecting layer; a second light absorption layer, located on the carrier transport layer; and a second electrode layer, located on the second light absorption layer to form an optical resonance cavity between the second electrode layer and the connecting layer, thereby the second light absorption layer and the carrier transport layer are located within the optical resonance cavity, and wherein the carrier transport layer has a first refraction index n 1 and a first thickness D 1 , the second light absorption layer has a second refraction index n 2 and a second thickness D 2 , and the carrier transport layer and the second light absorption layer satisfy: Φ1+Φ2−2π( n 1 D 1+ n 2 D 2)/λ=2mπ Φ 1 represents a reflective phase difference between the second electrode layer the second light absorption layer, Φ 2 represents a reflective phase difference between the connecting layer and the carrier transport layer, λ represents an absorption wavelength of the first light absorption layer, and m represents 0 or an integer, such that incident light entering the optical resonance cavity is reflected between the second electrode layer and the connecting layer for multiple times and is absorbed by the second light absorption layer in the optical resonance cavity for multiple times.