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A kind of perovskite solar cell without carrier transport layer and preparation method thereof

A solar cell and perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problem that two layers cannot be removed at the same time

Active Publication Date: 2021-07-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, we can try to remove one layer, but we cannot remove both layers at the same time

Method used

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  • A kind of perovskite solar cell without carrier transport layer and preparation method thereof
  • A kind of perovskite solar cell without carrier transport layer and preparation method thereof
  • A kind of perovskite solar cell without carrier transport layer and preparation method thereof

Examples

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Embodiment 1

[0044] Embodiment 1 (named after Graded Pb / Sn)

[0045] A method for preparing a perovskite solar cell without a carrier transport layer, comprising the following steps:

[0046] Step 1. Soak the ITO substrate in an ethanol solution containing 5% sodium hydroxide for 30 minutes to reduce its surface work function; then ultrasonicate the ITO substrate through acetone, absolute ethanol and water for 20 minutes respectively, and then use nitrogen gas to The gun is blown dry and ready for use;

[0047] Step 2. preparation perovskite lead precursor solution: the KI-dimethyl sulfoxide (DMSO) doping liquid that concentration is 1mol / L is added the lead iodide-dimethylformamide (DMF that concentration is 1.3mol / L ) in the base solution, after mixing, heat and stir at 70°C until uniform, wherein the volume of the doping solution is 5% of the volume of the base solution;

[0048] Step 3. Preparation of perovskite formamidine iodine (FAI) precursor solution: mix 60mg of FAI powder with...

Embodiment 2

[0054] According to the steps of Example 1, the perovskite battery was prepared, only the substrate was replaced with an FTO substrate. Compared with the ITO substrate, the work function of FTO was inherently smaller, so the sodium hydroxide-ethanol solution immersion process was not required, and the other steps were not Change.

Embodiment 3

[0056] The perovskite battery was prepared according to the steps in Example 1, only the annealing temperature in step 6 was adjusted to 100° C., and other steps remained unchanged.

[0057] The annealing temperature determines the gradient size of the perovskite Sn-Pb gradient, the higher the temperature, the gradient will decrease due to ion diffusion. When the substrate is placed at 100 degrees Celsius, the Sn-richness of the upper surface of the film increases.

[0058] Devices with different structures refer to whether to choose to prepare hole transport layer and electron transport layer structures during preparation.

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Abstract

The object of the present invention is to provide a perovskite solar cell without a carrier transport layer and a preparation method thereof, belonging to the technical field of perovskite cells. The present invention proposes a graded perovskite homojunction optical absorption layer based on B-site elements Pb and Sn. The Fermi energy level of the lead-rich side of the absorption layer is higher than that of the tin-rich side, so that the perovskite The light-absorbing layer presents a gradual change from n to p, which makes the perovskite homojunction itself capable of carrier separation, thus making it possible for a perovskite cell without a carrier transport layer.

Description

technical field [0001] The invention belongs to the technical field of perovskite batteries, and in particular relates to a perovskite solar battery without a carrier transport layer and a preparation method thereof. Background technique [0002] In recent years, organic-inorganic hybrid perovskite solar cells have attracted extensive attention due to their excellent photoelectric performance and low cost, and their single-cell photoelectric conversion efficiency has jumped from 3.8% in 2009 to 25% in 2019. above. Compared with crystalline silicon cells, the main advantages of perovskite cells lie in the low cost of the perovskite material itself and the simple solution method preparation process. However, unlike traditional crystalline silicon cells that only require a silicon-based p-n junction, perovskite solar cells often have a sandwich structure such as n-i-p (formal structure) or p-i-n (trans structure), where n is the electron transport layer, i is the perovskite l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/00H10K30/10H10K30/80Y02E10/549Y02P70/50
Inventor 熊杰孙浩轩晏超贻邬春阳王显福
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA