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An in situ fabricated carbon quantum dot sensitized solar cell

A technology of solar cells and carbon quantum dots, applied in circuits, capacitors, photosensitive devices, etc., to achieve the effects of improving application prospects, simple methods, and low cost

Active Publication Date: 2019-01-11
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no literature or patent report using carbon quantum dots sensitized solar cells obtained by in-situ deposition

Method used

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  • An in situ fabricated carbon quantum dot sensitized solar cell
  • An in situ fabricated carbon quantum dot sensitized solar cell
  • An in situ fabricated carbon quantum dot sensitized solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare 10 mL of 1M citric acid, add 0.3 mL of ethylenediamine, transfer to a hydrothermal kettle, and place TiO 2 The porous membrane is vertically immersed in the solution, and reacted with water at 150 degrees for 48 hours. After the hydrothermal reaction, the Na 2 S 2 Electrolyte solution, in situ prepared carbon quantum dots sensitized TiO 2 The porous film serves as a photoanode and a carbon counter electrode, and is assembled into a carbon quantum dot-sensitized solar cell. The photoelectrochemical performance test results of the battery are shown in figure 1 ; The change of photoanode morphology before and after depositing carbon quantum dots is shown in figure 2 ; The XRD spectrum of powdered carbon quantum dots is shown in image 3 .

Embodiment 2

[0030] On the basis of Example 1, the in-situ deposited carbon quantum dot sensitized photoanode is subjected to ZnS passivation treatment by alternately immersing the photoanode into 1M Zn(CH 3 COO) 2 and Na 2 S solution for 1 min, washed with pure water and dried. The photoelectrochemical performance test results of this ZnS passivated carbon quantum dot sensitized battery are shown in Figure 4 .

Embodiment 3

[0032] On the basis of Example 1, the in-situ deposited carbon quantum dot sensitized photoanode is subjected to post-sintering treatment, and the method is to place the photoanode in N 2 Under protection, sinter in a muffle furnace at 400°C for 10 minutes, and take it out after cooling down naturally. The photoelectrochemical performance test results of this post-sintered carbon quantum dot sensitized cell are shown in Figure 5 .

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Abstract

The invention discloses a carbon quantum dot sensitized solar cell prepared in situ. The solar cell is composed of a photoanode, a counter electrode and an electrolyte; wherein the photoanode uses carbon quantum dots as a sensitizer; the counter electrode is a catalytically active material; the electrolyte is a polysulfide redox pair electrolyte; the invention has low cost, The method is simple, suitable for making large-area quantum dot sensitized solar cells, clean and pollution-free, and improves the application prospect of quantum dot sensitized solar cells.

Description

technical field [0001] The invention belongs to the field of solar cell manufacturing, and in particular relates to an in-situ prepared carbon quantum dot sensitized solar cell. Background technique [0002] Facing the depletion of global fossil energy, inexhaustible solar energy can replace fossil energy to solve the increasingly serious energy crisis. Among all kinds of new solar cells, dye-sensitized solar cells (DSCs) have become a research hotspot due to their low cost, simple manufacturing process, and relatively high photoelectric conversion efficiency (O’Regan, B., Grätzel, M., Nature , 1991, 353, 737). However, their disadvantages cannot be ignored: on the one hand, the stability of dyes needs to be further improved; on the other hand, the price is relatively high, which limits the further reduction of the cost of dye-sensitized solar cells. The use of inexpensive narrow-bandgap inorganic semiconductor nanocrystals, namely quantum dots, as a sensitizer can further...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20
CPCH01G9/20H01G9/2018H01G9/2045Y02E10/542Y02P70/50
Inventor 李洪光张全新孙晓峰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI