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Novel photoanode assisted by Er-doped carbon quantum dots, a preparation method thereof and application thereof

A carbon quantum dot and photoanode technology, applied in the field of quantum dot sensitized solar cells, can solve the problem of low charge separation and collection efficiency, small CdS light absorption capacity and range, and low energy conversion efficiency of CdS quantum dot sensitized solar cells. Theoretical energy Conversion efficiency and other issues, to achieve the effect of reducing compound interest rate, broadening light absorption range, and improving light utilization rate

Active Publication Date: 2018-02-23
爱瑞克(大连)安全技术集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, currently TiO-based 2 The energy conversion efficiency of photoanode CdS quantum dot-sensitized solar cells is still far below its theoretical energy conversion efficiency
Two factors contributed to this result, one being the light-absorbing capacity and small range of CdS, and the other being the low charge separation and collection efficiency.

Method used

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  • Novel photoanode assisted by Er-doped carbon quantum dots, a preparation method thereof and application thereof
  • Novel photoanode assisted by Er-doped carbon quantum dots, a preparation method thereof and application thereof
  • Novel photoanode assisted by Er-doped carbon quantum dots, a preparation method thereof and application thereof

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Embodiment 1

[0030] Example 1 Er-doped carbon quantum dot assisted novel photoanode CdS / Er-CQDs / TiO 2

[0031] (1) Preparation method

[0032] 1. Preparation of Er-CQDs

[0033] Er-CQDs were prepared by reflux method and hydrothermal method. 2.47g triethylenetetraminehexaacetic acid and 0.96g erbium oxide were dissolved in 100mL deionized water, transferred to a three-necked flask and heated to reflux until the solution was transparent. Adjust the pH of the above solution to 5 with ammonia water, then concentrate the solution to 50mL, and finally transfer the concentrated solution to a 100mL polytetrafluoroethylene reactor, and heat it to 180°C for 10h.

[0034] 2. Coated with TiO 2 Preparation of Thin Film FTO Glass

[0035] Prepared by sol-gel precursor and spin coating method, first, mix 8.5mL tetrabutyl titanate and 15.8mL absolute ethanol (marked as solution A), and stir for 30min. Then, 0.45 mL of deionized water and 3 drops of concentrated nitric acid were added to 20 mL of ab...

Embodiment 2

[0062] Example 2 CdS / Er-CQDs / TiO 2 Application of Photoanode in Cadmium Sulfide Quantum Dots Sensitized Solar Cells

[0063] (1) Preparation of cadmium sulfide quantum dot-sensitized solar cells

[0064] 1. Preparation of Er-CQDs

[0065] Er-CQDs were prepared by reflux method and hydrothermal method. 2.47g triethylenetetraminehexaacetic acid and 0.96g erbium oxide were dissolved in 100mL deionized water, transferred to a three-necked flask and heated to reflux until the solution was transparent. Adjust the pH of the above solution to 5 with ammonia water, then concentrate the solution to 50mL, and finally transfer the concentrated solution to a 100mL polytetrafluoroethylene reactor and heat to 180°C for 10h.

[0066] 2. Coated with TiO 2 Preparation of Thin Film FTO Glass

[0067] Prepared by sol-gel precursor and spin coating method, first, mix 8.5mL tetrabutyl titanate and 15.8mL absolute ethanol (marked as solution A), and stir for 30min. Then, 0.45 mL of deionized w...

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Abstract

The invention relates to a novel photoanode assisted by Er-doped carbon quantum dots, a preparation method thereof and application thereof. The Er-doped carbon quantum dots (Er-CQDS) are prepared by ahydrothermal method. CdS quantum dots (CdS QDs) are deposited on an Er-CQDs / TiO2 thin film by a sequential ion-layer adsorption and reaction (SILAR) method. The presence of the Er-CQDs in the photoanode is confirmed by X-ray energy analysis spectroscopy and a transmission electron microscopy. An electrochemical method is used to study the influence of the introduction of Er-CQDs on the photoelectric performance of a cadmium sulfide quantum dot sensitized solar cell. A result shows that the Er-CQDs have the functions of broadening the optical absorption range and electron transport of the CdSQDs, and thus the photovoltaic performance of the CdS QDSSCs can be improved. The novel photoanode of the present invention can be widely used in solar cells, especially in the field of quantum dot sensitized solar cells, and the novel photoanode has a broad prospect.

Description

technical field [0001] The invention belongs to the field of quantum dot sensitized solar cells, in particular the application on cadmium sulfide quantum dot sensitized solar cells. Background technique [0002] With the development of human society, human's demand for energy is increasing, and the use of traditional energy has caused serious energy crisis and environmental pollution. Human beings urgently need to find a sustainable clean energy source. Because solar energy is an inexhaustible and inexhaustible clean energy, therefore, converting solar energy into other forms of energy can solve the huge demand of human beings for energy, thereby solving the problem of environmental pollution. A solar cell is a device that converts solar energy into electricity. Among all kinds of solar cells, quantum dot-sensitized solar cells have attracted much attention because of their unique advantages, and are considered to be the next generation of solar cells. [0003] Quantum do...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20
CPCH01G9/20H01G9/2022H01G9/2031Y02E10/542
Inventor 王君舒晓青张朝红赵成张旭房大维刘逸伦
Owner 爱瑞克(大连)安全技术集团有限公司
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