A kind of rare earth SM-doped all-inorganic perovskite, preparation method and application thereof

An inorganic calcium and perovskite technology, applied in the field of solar cells, can solve the problems of poor humidity stability and hinder the photovoltaic performance of devices, and achieve the effects of reducing grain size, improving humidity stability and increasing surface energy.

Active Publication Date: 2022-05-03
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, CsPbI 2 Br perovskite materials still face the problem of poor humidity stability in the surrounding environment, that is, the rapid transformation of the α-phase to the δ-phase under humidity conditions, which seriously hinders the photovoltaic performance of the device in the environment.

Method used

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  • A kind of rare earth SM-doped all-inorganic perovskite, preparation method and application thereof
  • A kind of rare earth SM-doped all-inorganic perovskite, preparation method and application thereof
  • A kind of rare earth SM-doped all-inorganic perovskite, preparation method and application thereof

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Embodiment 1

[0028] This embodiment provides a kind of perovskite solar cell, its structure is specifically as follows figure 1 As shown, it includes a conductive substrate 1, an electron transport layer 2, a light absorption layer 3, a hole transport layer 4 and a metal electrode layer 5 stacked from bottom to top;

[0029] Among them, the light absorbing layer 3 is rare earth element Sm doped CsPbI 2 Br perovskite, while the conductive substrate 1 is ITO glass, the material of the electron transport layer 2 is tin dioxide, the material of the hole transport layer 4 is Spiro-OMeTA, and the metal electrode 5 is a silver electrode.

[0030] The specific preparation steps of the above-mentioned perovskite solar cell are as follows:

[0031] Step 1: Clean the ITO glass substrate sequentially with glass cleaner, deionized water, acetone, isopropanol, and absolute ethanol for 20 minutes, then dry it with nitrogen gas, and set it aside;

[0032] Step 2: Preparation of SnO on the treated ITO su...

Embodiment 2

[0037] Same as embodiment 1, difference: in step 3, in SnO 2 Spin coating of 2% SmCl on the electron transport layer 3 Doped CsPbI 2 Br precursor solution.

Embodiment 3

[0039] Same as embodiment 1, difference: in step 3, in SnO 2 The electron transport layer was spin-coated with 4% SmI 2 Doped CsPbI 2 Br precursor solution.

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Abstract

The invention provides a rare earth Sm-doped all-inorganic perovskite, which belongs to the technical field of solar cells. The perovskite includes rare earth element Sm doped inorganic halide perovskite. The invention also provides the application of a rare earth Sm-doped all-inorganic perovskite in a solar cell and a solar cell containing the rare-earth Sm-doped all-inorganic perovskite. The present invention introduces a rare earth element doped CsPbI 2 Br perovskite, reconstituted CsPbI 2 The crystal structure of Br perovskite regulates the film morphology, increases the lattice stress, and finally improves the CsPbI 2 Humidity stability of Br perovskite thin films.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a rare earth Sm-doped all-inorganic perovskite, a preparation method and an application thereof. Background technique [0002] Organic-inorganic hybrid perovskite solar cells have attracted great attention from researchers due to their suitable bandgap, high carrier mobility and low exciton binding energy. At present, its efficiency has been increased from the initial 3.8% to the current more than 25%. However, the thermodynamic instability of its organic cations greatly limits the progress of its device commercial application. In order to solve this problem, the application of all-inorganic perovskites, especially CsPbI 2 Br perovskite materials have a good balance of stability and photovoltaic performance. Since its development in 2016, its efficiency has increased from the initial 9.84% to more than 17% at present. However, CsPbI 2 Br perovskite materials ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/00H01L31/032H01L31/06
CPCC01G21/006H01L31/032H01L31/06C01P2004/03Y02E10/50
Inventor 张富于华张萌
Owner SOUTHWEST PETROLEUM UNIV
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