Dual-acceptor-contained three-element solar cell

Abstract

The invention, which belongs to the field of the organic polymer photovoltaic device or organic semiconductor film solar energy cell, discloses a dual-acceptor-contained three-element solar cell based on an inverse structure comprises a substrate, a transparent conductive cathode ITO, a cathode buffer layer, an optical active layer, an anode buffer layer, and a metal anode from bottom to top. The optical active layer includes the following components, by weight: 40% of electron donor, 10 to 50% of electron acceptor I, and 10% to 50% of electron acceptor II. According to the invention, with the dual electron acceptors, the light absorption waveband can be covered effectively; and on the basis of the stacking effect of acceptors, the crystallization of the thin film surface is optimized, the carrier transport is improved, the short-circuit current density of the device is enhanced, and the photoelectric conversion performance of the device is improved.

Description

technical field [0001] The invention belongs to the field of organic polymer photovoltaic devices or organic semiconductor thin-film solar cells, and in particular relates to an organic thin-film solar cell. Background technique [0002] With the explosive growth of the global energy demand, the energy problem has become the primary problem faced by the economic development of all countries. Because solar energy is clean, widely distributed, and inexhaustible, research on photovoltaic power generation to solve energy problems has become the focus and focus of research in the field of renewable energy. Currently, active layer materials can be classified into inorganic semiconductor materials and organic semiconductor materials according to the different properties of materials that make up the photoactive layer of a solar cell. Compared with inorganic semiconductor materials, organic semiconductor materials not only have relatively mild synthesis conditions and device proces...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional bulk heterojunction solar cells have the following two major problems: 1, the single acceptor bulk heterojunction light absorption range is limited, which, thereby limiting the short-circuit current density of the device; 2, based on fullerene derivatives Due to its molecular structure, the acceptor cannot effectively combine with the donor polymer to a certain extent, resulting in the inability to effectively form a donor-acceptor phase separation in the photoactive layer, thereby limiting the carrier transport efficiency.

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