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Organic/inorganic gradient diffusion interface layer-based organic photovoltaic cell and preparation method thereof

A technology of organic photovoltaic cells and gradient diffusion, applied in photovoltaic power generation, semiconductor/solid-state device manufacturing, circuits, etc., can solve the problems of conflict, pollution and sustainable development of energy consumption, and achieve the promotion of improving and reducing the probability of charge capture , Improve the effect of photoelectric conversion efficiency

Active Publication Date: 2019-06-11
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although silicon-based inorganic solar cells have been industrialized at present, the pollution and energy consumption generated during the manufacturing process are contrary to the goal of sustainable development of mankind.

Method used

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  • Organic/inorganic gradient diffusion interface layer-based organic photovoltaic cell and preparation method thereof
  • Organic/inorganic gradient diffusion interface layer-based organic photovoltaic cell and preparation method thereof
  • Organic/inorganic gradient diffusion interface layer-based organic photovoltaic cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]The organic photovoltaic cell based on the organic / inorganic gradient diffusion interface layer in this embodiment includes: from bottom to top, it includes a transparent substrate layer, a metal cathode layer, a gradient diffusion composite interface layer, an organic active layer, a hole transport layer and a metal anode layer. Among them, the material of the transparent substrate layer is transparent glass; the material of the metal cathode layer is Al; the material of the gradient diffusion composite interface layer includes zinc oxide and non-fullerene derivative ITIC; the material of the organic active layer is thiophene with a mass ratio of 2:3 Similar materials PTB7-Th and fullerene derivatives PC 71 BM; the material of the hole transport layer is MoO 3 ; The material of the metal anode layer is indium tin oxide.

[0037] The thickness of the transparent substrate layer of the organic photovoltaic cell is 1-1.5 cm, the thickness of the metal cathode layer is 80-...

Embodiment 2

[0065] Single dimensional test of embodiment 2 organic semiconductor material

[0066] The basic steps are the same as in Example 1, except that the organic semiconductor materials are respectively selected from small molecules of fullerene derivatives (PC 71 BM), non-fullerene derivative small molecule (ITIC) and organic bipolar molecule (DNcZPS), the organic photovoltaic cell prepared by this embodiment is tested for performance, and the obtained results are as follows Figure 7 shown. It can be seen from the figure that the opening voltage of organic photovoltaic cells is 0.81V, the fill factors are 0.60, 0.66, 0.61 and 0.61, and the efficiencies are 7.88%, 8.73%, 7.93% and 8.00%, respectively. layer, it is beneficial to improve the interfacial contact between the inorganic interface and the organic active layer.

Embodiment 3

[0067] The single-dimensional experiment of embodiment 3 organic semiconductor material concentration

[0068] The basic steps are the same as in Example 1, except that the solubility of the organic semiconductor molecular solution is 0.5mg / mL, 1.0mg / mL and 2.0mg / mL respectively, and the performance of the organic photovoltaic cell prepared in this example is tested , the obtained results are as follows Figure 8 shown. It can be seen from the figure that the opening voltage of the devices is 0.81V, the fill factors are 0.60, 0.63, 0.66 and 0.63, and the efficiencies are 7.88%, 8.11%, 8.73% and 8.23%. When the concentration of the doped organic semiconductor molecule solution is 1mg / ml, the organic photovoltaic device exhibits a relatively good fill factor and photoelectric conversion efficiency. The XPS test data of the organic / inorganic gradient diffusion interface prepared by zinc oxide and the optimal concentration of 1.0mg / ml and its etching for 10s are as follows: Fi...

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Abstract

The invention discloses an organic / inorganic gradient diffusion interface layer-based organic photovoltaic cell and a preparation method thereof. The organic photovoltaic cell sequentially comprises atransparent substrate layer, a metal negative electrode layer, a gradient diffusion composite interface layer, an organic active layer, a hole transmission layer and a metal positive electrode layerfrom bottom to top, wherein the material in the gradient diffusion composite interface comprises an inorganic metal oxide and an organic semiconductor molecule, and the corresponding layer is sequentially fabricated on each layer during fabrication. Compared with a traditionally metal oxide and organic / inorganic dual interface layers, the organic photovoltaic cell has the advantages that photoelectric conversion efficiency is remarkably improved; on one hand, the surface defect of an inorganic interface material can be passivated, and the charge recombination probability caused by physical defect is reduced; and on the other hand, the problem of charge interface transmission caused by energy level difference between an active layer and the interface layer can be reduced by building the organic-inorganic composite interface layer with a gradient diffusion structure.

Description

technical field [0001] The invention belongs to the field of organic photovoltaic cells, in particular to an organic photovoltaic cell based on an organic / inorganic gradient diffusion interface layer and a preparation method thereof. Background technique [0002] With the continuous increase of human demand for energy, traditional non-renewable fossil energy can no longer fully meet people's demand for sustainable development. In order to solve the increasingly serious energy problems and environmental problems, clean and renewable energy represented by solar energy has attracted more and more attention. Although silicon-based inorganic solar cells have been industrialized at present, the pollution and energy consumption problems generated during the manufacturing process are contrary to the goal of sustainable development of mankind. Therefore, the research and development of efficient, stable and low-cost new solar cells is of great significance to promote the development...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48H01L51/00
CPCY02B10/10
Inventor 李明光陈润锋李静黄维
Owner NANJING UNIV OF POSTS & TELECOMM
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