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Preparation method of inorganic trans-perovskite solar cell based on quantum dot modification

A technology of solar cells and quantum dots, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of unstable structure of inorganic perovskite materials and poor charge extraction ability, so as to improve charge extraction ability, improve utilization rate, The effect of stability improvement

Inactive Publication Date: 2019-08-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, especially to overcome the problems of unstable structure and poor charge extraction ability of inorganic perovskite materials in the prior art, and to provide a stable quantum dot-based modification Preparation method of inorganic trans perovskite solar cells

Method used

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Effect test

Embodiment 1

[0034] The method for preparing an inorganic trans-perovskite solar cell based on quantum dot modification in this embodiment includes the following steps:

[0035] (1) Preparation of transparent conductive substrate: Clean the FTO conductive glass with deionized water, absolute ethanol, and isopropanol by ultrasonic vibration. After the vibration, use ozone to oxidize the surface organic groups to obtain a transparent conductive substrate;

[0036] (2) Prepare CuO on the transparent conductive substrate obtained in step (1) x Inorganic hole transport layer: Spin-coat 100 μL, 3 mg / ml copper acetylacetonate in chloroform solution on the transparent conductive substrate by spin-coating method at 2000 rpm for 30 s to make it evenly form a film, and place it in a muffle In the furnace, it was annealed at 100°C for 15 minutes to form a hole transport layer. After removing the impurities on the surface washed with absolute ethanol, it was treated with an ultraviolet ozone lamp for 1...

Embodiment 2

[0046] The method for preparing an inorganic trans-perovskite solar cell based on quantum dot modification in this embodiment includes the following steps:

[0047] (1) Preparation of transparent conductive substrate: Clean the FTO conductive glass with deionized water, absolute ethanol, and isopropanol by ultrasonic vibration. After the vibration, use ozone to oxidize the surface organic groups to obtain a transparent conductive substrate;

[0048] (2) Prepare CuO on the transparent conductive substrate obtained in step (1) x Inorganic hole transport layer: Spin-coat 100 μL, 5 mg / ml copper acetylacetonate in chloroform solution on a transparent conductive substrate at 3000 rpm for 35 s by spin-coating method to make it evenly form a film, and place it in a muffle In the furnace, it was annealed at 120°C for 20 minutes to form a hole transport layer. After removing the impurities on the surface washed with absolute ethanol, it was treated with an ultraviolet ozone lamp for 15 ...

Embodiment 3

[0058] The method for preparing an inorganic trans-perovskite solar cell based on quantum dot modification in this embodiment includes the following steps:

[0059] (1) Preparation of transparent conductive substrate: Clean the FTO conductive glass with deionized water, absolute ethanol, and isopropanol by ultrasonic vibration. After the vibration, use ozone to oxidize the surface organic groups to obtain a transparent conductive substrate;

[0060] (2) Prepare CuO on the transparent conductive substrate obtained in step (1) x Inorganic hole transport layer: Under the condition of indoor relative humidity of 33%, 150 μL, 7 mg / ml copper acetylacetonate solution in chloroform was spin-coated on the transparent conductive substrate by spin-coating method at 2500 rpm for 40 s. After forming a uniform and flat film, place it in a muffle furnace and anneal at 140°C for 25 minutes to form a hole transport layer. After removing the impurities on the surface washed with absolute ethano...

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Abstract

The invention discloses a preparation method of an inorganic trans-perovskite solar cell based on quantum dot modification. The preparation method comprises the following steps: (1) washing transparent FTO conducting glass; (2) preparing a CuOx inorganic hole transport layer; (3) preparing an inorganic perovskite / quantum dot composite film on the inorganic hole transport layer as a light absorption layer and an electron transport layer of the device together; and (4) enabling the inorganic perovskite / quantum dot composite film to be covered with a counter electrode so as to obtain the inorganic trans-perovskite solar cell based on quantum dot modification. The light absorption layer is prepared from quantum dots with light absorption capacity and an inorganic perovskite light absorption material together, so that the utilization rate of sunlight is improved, the quantum dots are used as the electron transport layer while the charge extraction capacity of the device is improved, and thepreparation technology is simplified; and moreover, the inorganic perovskite crystal structure and film-forming property are improved through partial doping of the quantum dots, so that the stabilityof the device is improved, and the transportation and separation of carriers are further accelerated while the charge recombination is reduced effectively.

Description

technical field [0001] The invention belongs to the field of organic photoelectric-solar cells, and in particular relates to a method for preparing quantum dot-based modified inorganic trans-type perovskite solar cells. Background technique [0002] Perovskite solar cells have become a research hotspot in the field of optoelectronic devices due to their high efficiency, low cost, simple process, and environmental friendliness. At present, the conversion efficiency of this type of solar cell has reached 24.2%, showing a very high potential for development and application. Although as a new type of battery, the photoelectric conversion efficiency of perovskite solar cells has far exceeded other types of new concept solar cells, and there is still a lot of room for improvement, but its stability is far from the expectations of practical applications. far. Among them, the perovskite light-absorbing material CH 3 NH 3 wxya 3 (X=I, Br, Cl) is extremely sensitive to light, hea...

Claims

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Application Information

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IPC IPC(8): H01L31/0352H01L31/0336H01L31/072H01L31/18
CPCH01L31/0336H01L31/035218H01L31/072H01L31/18Y02E10/50
Inventor 杨英林飞宇郭学益朱从潭陈甜
Owner CENT SOUTH UNIV
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