A kind of polymer solar cell and preparation method thereof

Abstract

Provided are a polymer solar cell and a preparation method thereof. The cell comprises a transparent positive pole, hole transporting layers, an optical active layer and a metal negative pole, wherein the hole transporting layers comprise a first hold transporting layer and a second hold transporting layer, the first hole transporting layer is arranged on the surface of the transparent positive pole, and metal nano materials are doped in the first hole transporting layer; the second hold transporting layer is arranged on the surface of the first hole transporting layer; and metal nano materials are doped in the optical active layer. According to the polymer solar cell and the preparation method, the exposed metal nano materials in the first hole transporting layer are coated, the exposed metal nano materials in the first hole transporting layer and the optical active layer in the cell form good ohmic contact, the electrical property of the cell are prevented from being influenced due to leading-in of the metal nano materials, the fact that open-circuit voltage and filling factors of the cell are not reduced is guaranteed, and meanwhile photoelectric conversion efficiency is improved by more than 10%.

Description

technical field [0001] The invention belongs to the field of organic solar cells, in particular to a polymer solar cell and a preparation method thereof. Background technique [0002] Polymer solar cells are composed of polymer materials as the core part. Based on the photovoltaic effect of polymer semiconductors, polymer materials absorb photons to realize photoelectric conversion solar cells. Due to the low synthesis cost of polymer materials, easy modulation of functions, good flexibility and film-forming properties, polymer solar cells are inexpensive and have diverse uses, which has become a new direction for the development of solar cells. The optimal thickness of the photoactive layer of polymer solar cells is between 80 and 200nm. Such a thin layer leads to low light absorption, which becomes an important factor restricting the photoelectric conversion efficiency. Therefore, how to improve the photoelectric conversion efficiency of the cell without increasing the th...

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Problems solved by technology

For example, the Chinese patent application No. 201210101153.6 discloses a solar cell, which is doped with metal nanoparticles-graphene oxide in the hole transport layer, and utilizes the effect of localized enhancement of the surface plasmon of the metal nanoparticles to increase However, due to the direct contact between the metal nanomaterial and the photoactive layer, the electrical properties such as the resistance, open circuit voltage, and fill factor of the solar cell device are affected, and the photoelectric conversion efficiency of the cell is affected.

"Enhancement of Donor-Acceptor Polymer Bulk Heterojunction SolarCell Power Conversion Efficiencies by Addition of Au Nanoparticles" published by Alan J. Heeger (Angew. Chem. Int. Ed., 2011, 50, 5519-5523) proposes the use of light in polymer solar cells Doping Au nanoparticles in the active layer can improve the photoelectric conversion efficiency, because only Au nanoparticles are doped in the photoactive layer, the photoelectric conversion efficiency is less improved

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