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All-solid-state sensitized solar cell and preparation method thereof

A solar cell, all-solid-state technology, applied in the field of dye-sensitized solar cells, can solve problems such as reducing electron injection efficiency, and achieve the effects of improving photoelectric conversion efficiency, increasing electron injection efficiency, and easy operation

Inactive Publication Date: 2015-02-11
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Previous studies mostly focus on the preparation of CH 3 NH 3 PB 3 After the layer, the hole transport layer is placed directly behind the sensitizing layer, and leakage current phenomenon will occur, which will reduce the electron injection efficiency.

Method used

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  • All-solid-state sensitized solar cell and preparation method thereof
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  • All-solid-state sensitized solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Example 1, preparation of all solid-state sensitized solar cells

[0056] 1) Preparation of photoanode

[0057] Preparation of dense film layer and porous film layer:

[0058] Prepare according to conventional methods, and can be prepared according to the methods provided in the following documents: Lead Iodide Perovskite Sensitized All-Solid-State Submicron Thin Film Mesoscopic Solar Cell with Efficiency Exceeding9%, H.S.Kim, C.R.Lee, J.H.Im, K.B.Lee, T .Moehl, A.Marchioro, S.J.Moon, R.Humphry-Baker, J.H.Yum, J.E.Moser, M.Gratzel and N.G.Park, Scientific Reports, 2012, 2,591. The specific steps are:

[0059] a. A dense titanium dioxide film was prepared by spin coating, and the precursor solution of the dense film was coated on the surface of the conductive glass, and the film was spinned for 30 seconds at a rotational speed of 2000 rpm. Immediately after the end, place the film on a hot plate preheated to 80°C for 30 minutes; the thickness of the dense film layer is...

Embodiment 2

[0077] Example 2, preparation of all solid-state sensitized solar cells

[0078] Follow exactly the same steps as in Example 1, only the hole transport layer in step 3) is replaced by PTAA, and the composition of the hole transport material is as follows: PTAA, 4-tert-butylpyridine, bistrifluoromethanesulfonimide The ratio of lithium acetonitrile solution to chlorobenzene is 0.18 g: 17.5 μL: 37.5 μL: 1 mL, and the concentration of the acetonitrile solution of lithium bistrifluoromethanesulfonimide is 170 mg / mL.

[0079] In AM1.5, 100mW / cm 2 Test the I-V performance curve of the battery with KEITHLEY4200 under light, such as figure 1 As shown in , the short-circuit current density of the battery is 5.6mA / cm 2 , the open circuit voltage is 0.725V, the fill factor is 0.534, and the photoelectric conversion efficiency is 2.17%.

Embodiment 3

[0080] Example 3, preparation of all solid-state sensitized solar cells

[0081] Follow exactly the same steps as in Example 1, only the preparation method of the sensitizer layer in step 1) is changed, PbI 2 and CH 3 NH 3 At the same time, I is used as a thermal evaporation source and evaporated onto the surface of the titanium dioxide film.

[0082] In AM1.5, 100mW / cm 2 Test the I-V performance curve of the battery with KEITHLEY4200 under light, such as figure 1 As shown in , the short-circuit current density of the battery is 8.6mA / cm 2 , the open circuit voltage is 0.785V, the fill factor is 0.626, and the photoelectric conversion efficiency is 4.23%.

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Abstract

The invention discloses an all-solid-state sensitized solar cell and a preparation method thereof. The all-solid-state sensitized solar cell sequentially comprises a photo anode, an interface modification layer, a hole transport layer and a counter electrode from bottom to top, wherein the photo anode sequentially comprises a conductive glass layer, a dense film layer, a porous film layer and a sensitizer layer form bottom to top, and the dense film layer and the porous film layer are both made from titanium dioxide; the sensitizer layer is made from CH3NH3PbI3; the inference modification layer is made from aluminum oxide or magnesium oxide; the hole transport layer is made from spiro-MeOTAD or PTAA; the counter electrode is an Au electrode. The preparation method comprises the steps of during a process of preparing the solar cell, enabling a thin film to be immersed in polymeric precursor solution of the aluminum oxide after the sensitizer layer is prepared and before the spin-coating of a hole transport material is carried out, and obtaining an aluminum oxide interface modification material after natural drying, wherein the charge recombination can be prevented by the interface modification material, and the electron injection efficiency can be increased. According to the all-solid-state sensitized solar cell and the preparation method, disclosed by the invention, the cost is low, the photoelectric conversion efficiency of an all-solid-state dye-sensitized solar cell can be obviously increased, and a great significance is obtained for practical application of the all-solid-state dye-sensitized solar cell.

Description

technical field [0001] The invention relates to an all-solid-state sensitized solar cell and a preparation method thereof, belonging to the field of dye-sensitized solar cells. Background technique [0002] After the 21st century, energy issues have become an important issue related to human survival. In the process of rapid economic and social development, human needs for energy are increasing. However, traditional fossil fuels (coal, oil, natural gas) are being depleted day by day due to their continuous consumption. The development of renewable new energy helps to alleviate the pressure on the world's energy and environment, and solar energy is the green renewable energy with the most widespread distribution and the largest amount of resources among all new energy sources. [0003] Solar cells can directly convert light energy into electrical energy, and the development of solar cells is one of the most effective ways to utilize solar energy. The solar battery is small...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542
Inventor 牛广达李闻哲王立铎董豪鹏邱勇
Owner TSINGHUA UNIV
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