Organic laminated solar cell unit and preparation method thereof

Abstract

The invention discloses an organic laminated solar cell unit, which is of a laminated structure, and sequentially comprises an electrode layer, a first electron transport layer, a first active layer,a first hole transport layer, a second electron transport layer, a second active layer, a second hole transport layer and a metal back electrode from bottom to top, wherein two active layers are arranged in the cell unit and are separated by an intermediate transmission layer consisting of the first hole transport layer and the second electron transport layer to improve the light absorption efficiency so as to improve the photoelectric conversion efficiency, when the materials of the first active layer and the second active layer are different, absorption and utilization of sunlight in different wave bands can be realized so as to expand the spectral response and reduce the energy loss, and a flexible organic solar cell may be obtained when the organic laminated solar cell unit is locatedon a flexible substrate.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an organic stacked solar cell unit and a preparation method thereof. Background technique [0002] Solar energy is an inexhaustible green energy source. Converting solar energy into electrical energy has become a research hotspot and a focus of industrial development in various countries. Organic solar cells have the outstanding advantages of low cost, light weight, simple manufacturing process, and flexibility, among which thinness, lightness, and flexibility are irreplaceable advantages of inorganic semiconductor materials. [0003] The low dielectric constant of organic semiconductor materials easily forms a large binding energy when photons are absorbed, and exciton dissociation requires a large driving force, thus resulting in a loss of open circuit voltage. At the same time, the low carrier mobility of organic semiconductor materials limits the thickness of the active ...

AI Technical Summary

Problems solved by technology

[0003] The low dielectric constant of organic semiconductor materials can easily form a large binding energy when photons are absorbed, and the dissociation of excitons requires a large driving force, thus causing the loss of open circuit voltage

At the same time, the low carrier mobility of organic semiconductor materials limits the thickness of the active layer of organic solar cells, thereby limiting the light absorption efficiency of the cell, resulting in low photoelectric conversion efficiency.

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