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Heterojunction exciton solar cell and preparation method

A solar cell and heterojunction technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of high cost, low efficiency, and environmental pollution of silicon-based solar cells, and achieve improved application, easy lattice matching, and improved The effect of conversion efficiency

Active Publication Date: 2018-05-25
SOUTHEAST UNIV
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Problems solved by technology

[0003] Traditional silicon-based solar cells based on homogeneous PN junction technology have disadvantages such as high cost, low efficiency, and environmental pollution. The introduction of heterojunction technology has become a key way to solve this problem

Method used

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  • Heterojunction exciton solar cell and preparation method
  • Heterojunction exciton solar cell and preparation method
  • Heterojunction exciton solar cell and preparation method

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Embodiment Construction

[0026] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1 Shown is the heterojunction excitonic solar cell according to the present invention, including the lower electrode 1, the metal substrate 2, the p-type strained layer of black phosphorene 3, the n-type free layer of black phosphorene 4, the upper electrode 5 and the anti-reflection Layer 6. The first layer is the bottom electrode, the second layer is the metal substrate, the third layer is the p-type strained layer of black phosphorene, the fourth layer is the n-type free layer of black phosphorene, and the uppermost layer is the upper electrode and anti-reflection Floor. The upper electrode is a metal contact grid. The metal substrate can be a copper substrate.

[0028] Such as figure 2 Shown is a heterojunction composed of a strained layer of black phosphorene and a free layer of black phosphore...

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Abstract

The invention discloses a heterojunction exciton solar cell and a preparation method thereof. The heterojunction exciton solar cell comprises a five-layer structure, wherein a lower electrode is arranged on a lowest layer, a metal substrate is arranged on a second layer, a strain layer black phosphorene is arranged on a third layer, a free layer black phosphorene is arranged on a fourth layer, and an upper electrode and an anti-reflecting layer are arranged on an uppermost layer. Single-layer black phosphorus is obtained through a mechanical stripping method; and strain is applied to the single-layer black phosphorus through mechanical compression. A semiconductor heterojunction is formed by the single-layer black phosphorus to which the strain is applied, and the single-layer black phosphorus to which no strain is applied along the black phosphorus armchair direction, the absorption spectrum range is wide, and the photoelectric conversion efficiency is high. Compared with a heterojunction formed by different materials, the lattice matching is easier to achieve by the heterojunction formed by the same material, and the preparation technology is simpler. Under solar radiation, the open-circuit voltage of the solar cell theoretically reaches 0.55V, and the energy conversion efficiency of the solar cell can reach 20%.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a heterojunction exciton solar cell and a preparation method thereof. Background technique [0002] Among the many new energy sources, solar energy, as a renewable energy source, is highly regarded by scientific researchers for its unique advantages such as abundant reserves, no geographical restrictions, clean and pollution-free, fastest growing, most environmentally friendly, and inexhaustible. their favor. Moreover, the current global energy crisis and ecological crisis are driving people to focus on the research of solar cells. A solar cell refers to a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect. [0003] Traditional silicon-based solar cells based on homogeneous PN junction technology have disadvantages such as high cost, low efficiency, and environmental pollution. The introducti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/072H01L31/0264H01L31/18
CPCH01L31/0264H01L31/072H01L31/18Y02E10/50Y02P70/50
Inventor 雷双瑛沈海云
Owner SOUTHEAST UNIV