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Quantum dot dye-sensitized solar cell

A technology of solar cells and dye sensitization, applied in the field of dye-sensitized solar cells, can solve the problems of limited improvement of battery conversion efficiency, achieve the effects of improving conversion efficiency, enhancing light absorption effect, and increasing effective utilization rate

Active Publication Date: 2012-11-14
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the absorption spectrum range of the above-mentioned dye-sensitized solar cells still only includes visible light and ultraviolet light, so the improvement of the conversion efficiency of the cells is limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0056] Experimental Example 1: Making TiO 2 / quantum dots / nano metal particles / quantum dot dye-sensitized solar cells of N719 dye, the steps are as follows:

[0057] Step 1. Preparation of working electrode: prepare titanium dioxide slurry, prepare a titanium dioxide electrode layer (thickness 13 microns) on the transparent conductive substrate (FTO / glass) by doctor blade coating, and send it to a high-temperature furnace for sintering at 450°C for 30 minutes.

[0058] Step 2. Soak the working electrode of step 1 in 40mM TiCl 4 After soaking at 70°C for 30 minutes, it is sent to a high-temperature furnace for sintering at 500°C for 60 minutes.

[0059] Step 3. Prepare nano-gold material, and prepare nano-gold on the electrode layer in step 2 by coating.

[0060] Step 4. Prepare quantum dot (CIGS) material, and prepare the quantum dot material on the titanium dioxide electrode layer in step 3 by coating.

[0061] Step 5. Put the working electrode prepared in step 4 into a hi...

experiment example 2

[0067] Experimental Example 2: Making TiO 2 / quantum dots / N719 dye quantum dot dye-sensitized solar cells

[0068] The steps of Experimental Example 1 above were repeated, but the step of adding metal nanoparticles was not included.

experiment example 3

[0069] Experimental Example 3: Making TiO 2 / Nanometal Particles / Dye-sensitized solar cells with N719 dye

[0070] Repeat the steps of the above experimental example 1, but do not include the step of adding quantum dots.

[0071] Measurement

[0072] Figure 5 It is a graph of photocurrent density and voltage (I-V) of the dye-sensitized solar cells of Experimental Examples 1-3 and Comparative Example. Table 1 below records the measured data of Experimental Examples 1-3 and Comparative Example and calculates the cell efficiency of the solar cell.

[0073] Depend on Figure 5 As can be seen from Table 1, the efficiency of the quantum dot dye-sensitized solar cell of Experimental Example 1 is significantly higher than that of Comparative Example and Experimental Examples 2-3.

[0074] Table I

[0075]

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Abstract

A quantum dot dye-sensitized solar cell (QDDSSC) including an anode, a cathode, and an electrolyte between the anode and the cathode is provided. The anode includes a semiconductor electrode layer adsorbed with a dye, a plurality of quantum dots distributed within the semiconductor electrode layer, and a plurality of metal nanoparticles distributed within the semiconductor electrode layer. Because the absorption spectra of the quantum dots, the dye, and the semiconductor electrode layer cover the infrared (IR), visible, and ultraviolet (UV) regions of the solar spectrum, IR to UV light in thesolar spectrum can be effectively absorbed, and accordingly the conversion efficiency of the solar cell can be improved. Moreover, the metal nanoparticles can increase the light utilization efficiency.

Description

technical field [0001] The present invention relates to a dye-sensitized solar cell (dye-sensitized solar cell, DSSC), and in particular to a quantum dot dye-sensitized solar cell (QDDSSC). Background technique [0002] A solar cell is a clean energy source that generates electricity directly from sunlight. In recent years, dye-sensitized solar cells have become one of the most promising solar cells because the cost is much lower than other types of solar cells. [0003] The energy of solar radiation is mainly distributed in the visible light region and the infrared region, the former accounts for 50% of the total solar radiation, and the latter accounts for 43%. The ultraviolet region accounts for only 7% of the energy. However, the absorption spectrum range of traditional dye-sensitized solar cells only includes visible light and ultraviolet light, and the red light and infrared regions, which account for nearly 50% of the total solar radiation, have not been utilized. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/42H01L51/44
CPCY02E10/542Y02E10/50Y02E10/549
Inventor 黄昆平黄智勇陈建志
Owner IND TECH RES INST
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