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Carbon quantum dot sensitized solar cell prepared in situ

A technology of solar cells and carbon quantum dots, applied in circuits, capacitors, photovoltaic power generation, etc., to achieve low cost, improved application prospects, and simple methods

Active Publication Date: 2016-08-10
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Carbon quantum dot sensitized solar cell prepared in situ
  • Carbon quantum dot sensitized solar cell prepared in situ
  • Carbon quantum dot sensitized solar cell prepared in situ

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 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

[0031] 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

[0033] 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 consists of a photo-anode, a counter electrode and an electrolyte, wherein carbon quantum dots are a sensitizing agent for the photo-anode, the counter electrode is a catalytic activity material, and the electrolyte is a polysulfide redox couple electrolyte. The solar cell is low in cost and can be prepared in via simple method, large-area quantum dot sensitized solar cells can be produced, the solar cell has clean and pollution-free properties, and application prospects of the quantum dot sensitized solar cell are improved.

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 Applications(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
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