2results about How to "Extended transfer time" patented technology

The invention relates to a perovskite solar cell. The perovskite solar cell comprises a perovskite light absorption layer and a light-emitting passivation layer arranged on the surface of the perovskite light absorption layer, and the light-emitting passivation layer has a zero-dimensional perovskite structure. The light-emitting passivation layer with the zero-dimensional perovskite structure has excellent environmental stability and is beneficial to protecting the perovskite light absorption layer, so that the environmental stability of the solar cell is improved, the high photoluminescence quantum yield of the light-emitting passivation layer is beneficial to reducing non-radiative recombination of current carriers, the efficiency of the solar cell is improved, and the service life of the solar cell is prolonged. Moreover, the introduction of the light-emitting passivation layer can prolong the service life of carriers of the solar cell, prolongs the transmission time of the carriers, and improves the photoelectric conversion efficiency of the solar cell.

An optical element and imaging intervention device for light field modulation are disclosed. The optical element includes a lens substrate having a radial direction and a thickness direction perpendicular to the radial direction. A central visual region and a slow-light modulation region are formed on the lens substrate. The central visual region is formed in the middle of the lens substrate, and the slow-light modulation region is arranged around the central visual region. The slow-light modulation region includes multiple photonic crystals arranged in an array on the lens substrate to reduce the group velocity of light passing through the slow-light modulation region. This optical element can effectively control myopia.