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Preparation method for efficient CsPbI2Br inorganic perovskite solar cell

A technology for solar cells and inorganic calcium, applied in the field of solar cells, can solve the problems of poor film formation quality, reduce crystal nucleation and crystallization rate, etc., and achieve the effects of quality improvement, porosity reduction, and small human influence factors.

Inactive Publication Date: 2020-02-07
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To improve CsPbI 2 The problem of poor film quality in the preparation process of Br perovskite layer, the present invention proposes a high-efficiency CsPbI 2 Fabrication method of Br inorganic perovskite solar cells, spin-coated CsPbI 2 After the Br light-absorbing layer solution was annealed with gradient temperature, the rate of crystal nucleation and crystallization was reduced, and pinhole-free, high-quality CsPbI was prepared. 2 Thin films of Br perovskite layer enhance the performance of perovskite solar cells

Method used

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  • Preparation method for efficient CsPbI2Br inorganic perovskite solar cell

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Embodiment 1

[0022] A highly efficient CsPbI 2 Preparation method of Br inorganic perovskite solar cells, using ITO as conductive substrate, tin dioxide as electron transport layer, CsPbI 2 Br is the light absorbing layer, Spiro-OMeTAD is the hole transport layer, and silver is the counter electrode, such as figure 1 with figure 2 As shown, it specifically includes the following steps:

[0023] Step 1: Put the 2cm×2cm ITO glass into the cleaning rack, clean the surface with deionized water, absolute ethanol, acetone, isopropanol and absolute ethanol in sequence, and dry it with nitrogen gas for later use;

[0024] Step 2: Dilute the tin dioxide colloidal solution with a mass fraction of 20wt.% to 2.67wt.% with deionized water, prepare an appropriate amount of tin dioxide solution, and ultrasonically mix it for 30 minutes to obtain a mixed solution A;

[0025] Step 3: Spin-coat the mixed solution A on the surface of the ITO glass cleaned in step 1, and anneal at 150° C. for 30 minutes t...

Embodiment 2

[0031] A highly efficient CsPbI 2 Preparation method of Br inorganic perovskite solar cells, using FTO as conductive substrate, tin dioxide as electron transport layer, CsPbI 2 Br is the light-absorbing layer, Spiro-OMeTAD is the hole transport layer, and gold is the counter electrode, which specifically includes the following steps:

[0032] Step 1: Put the 2cm×2cm FTO glass into the cleaning rack, clean the surface with deionized water, absolute ethanol, acetone, isopropanol and absolute ethanol in sequence, and dry it with nitrogen gas for later use;

[0033] Step 2: Dilute the tin dioxide colloidal solution with a mass fraction of 20wt.% to 2.67wt.% with deionized water, prepare an appropriate amount of tin dioxide solution, and ultrasonically mix it for 30 minutes to obtain a mixed solution A;

[0034] Step 3: Spin-coat the mixed solution A on the surface of the FTO glass cleaned in step 1, and anneal at 150° C. for 30 minutes to obtain a tin dioxide electron transport l...

Embodiment 3

[0040] A highly efficient CsPbI 2 Preparation method of Br inorganic perovskite solar cells, using ITO as conductive substrate, tin dioxide as electron transport layer, CsPbI 2 Br is the light-absorbing layer, Spiro-OMeTAD is the hole transport layer, and carbon is the counter electrode, which specifically includes the following steps:

[0041] Step 1: Put the 2cm×2cm ITO glass into the cleaning rack, clean the surface with deionized water, absolute ethanol, acetone, isopropanol and absolute ethanol in sequence, and dry it with nitrogen gas for later use;

[0042] Step 2: Dilute the tin dioxide colloidal solution with a mass fraction of 20wt.% to 2.67wt.% with deionized water, prepare an appropriate amount of tin dioxide solution, and ultrasonically mix it for 30 minutes to obtain a mixed solution A;

[0043] Step 3: Spin-coat the mixed solution A on the surface of the ITO glass cleaned in step 1, and anneal at 150° C. for 30 minutes to obtain a tin dioxide electron transport...

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Abstract

The invention discloses a preparation method for an efficient CsPbI2Br inorganic perovskite solar cell, which belongs to the technical field of solar cells and comprises the following steps of: preparing an electron transport layer on a conductive substrate, dropwise adding a CsPbI2Br light absorption layer solution on the surface of the electron transport layer, conducting standing in a glove boxat 20-28 DEG C for 10-40 minutes after spin coating, conducting annealing at 30-60 DEG C for 1-6 minutes, and conducting annealing at 155-165 DEG C for 8-12 minutes to obtain a light absorption layerfilm, and sequentially preparing a hole transport layer and a counter electrode on the light absorption layer film to prepare the efficient CsPbI2Br inorganic perovskite solar cell. According to themethod, after spin coating of the CsPbI2Br light absorption layer solution is completed, a gradient temperature annealing mode is adopted, the crystal nucleation and crystallization rate is reduced, the pinhole-free and high-quality CsPbI2Br perovskite film is prepared, and the performance of the perovskite solar cell is improved.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a high-efficiency CsPbI 2 Preparation method of Br inorganic perovskite solar cells. Background technique [0002] Since the report, halide perovskite solar cells have attracted much attention due to the rapid development of their photoelectric conversion efficiency, which has rapidly increased from the initially reported 3.8% to more than 23%. Halide perovskite materials have excellent optoelectronic properties, such as long carrier diffusion length, medium carrier mobility, high light absorption coefficient and tunable optical band gap, and the preparation process is simple, so they are expected to become high-efficiency , low-cost, all-solid-state, flexible and wearable, and other advantages of a new generation of solar cells. [0003] Existing one-step spin coating method to prepare CsPbI 2 In the method of Br perovskite solar cells, spin coating and annealing are gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48
CPCH10K71/40Y02E10/549
Inventor 张富于华章文峰
Owner SOUTHWEST PETROLEUM UNIV
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