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.
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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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