Semitransparent photoconversion device

摘要

The main object of the present invention is to provide a semitransparent photo conversion device that enhances harvesting of visible sunlight. For this purpose, a semitransparent photovoltaic cell is provided with a multilayer structure (7) that can be used to change the color hue appearance of the cell while guaranteeing a minimum change in the light absorption capability. The photo conversion device has a direct or inverted architecture that comprises a first light transmissive electrical contact (2) overlaying a transparent substrate (1), a charge blocking layer (3) overlying the first light transmissive electrical contact (2) and underlying the active organic photosensitive material (4), a second charge blocking layer (5) overlying the active organic photosensitive material (4), a second light transmissive electrical contact (6) overlying the second charge blocking layer (5), and a multilayer structure (7) overlying the second light transmissive electrical contact (6). The multilayer structure (7) is composed of two or more layers of light non-absorbing dielectric materials and two adjacent layers in the multilayer structure always have different refractive indexes.