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A kind of preparation method of perovskite film and its application in perovskite solar cell

A solar cell and perovskite technology, which is applied in circuits, electrical components, photovoltaic power generation, etc., can solve problems such as perovskite loss

Active Publication Date: 2020-10-27
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyethylene glycol and ammonium salts are insulators, which will cause some unnecessary losses to the carrier transport of perovskite.

Method used

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  • A kind of preparation method of perovskite film and its application in perovskite solar cell
  • A kind of preparation method of perovskite film and its application in perovskite solar cell
  • A kind of preparation method of perovskite film and its application in perovskite solar cell

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preparation example Construction

[0032] (3) Preparation of polyethylene glycol perylene imide derivatives: Utilize N-methylpyrrolidone (NMP) as solvent, in dibromoperylene imide (PDI 2 Add a small amount of potassium carbonate (K 2 CO 3 ), heating to reflux, and column purification to obtain the product polyethylene glycol-modified perylene imide derivative (PDI-PEG). (n=35-255)

[0033]

[0034] (4) Preparation of polyethylene amine perylene imide derivatives: Perylenetetracarboxylic dianhydride (PTCDA) and polyethylene amine were reacted at 160 ° C for 4 h under the conditions of using imidazole as the reaction solvent and zinc acetate as the catalyst. Column purification yielded polyethyleneamine-modified peryleneimide derivatives (PTC-PEI) (n=25-115).

[0035]

Embodiment 1

[0036] Example 1: Preparation of lead-based perovskite solar cells with chlorobenzene solution anti-solvent.

[0037] Step 1: Clean the surface of ITO glass (1.5cm*1.5cm), and clean the surface with ultraviolet ozone for 10 minutes.

[0038] Step 2: Add 0.5mol Ni(NO 3 ) 2 ·6H 2 O was dispersed into 100mL deionized water, placed on a magnetic stirrer to dissolve, and after calibrating the pH meter with pH 4.01 and 7.13 calibration solutions, 10mol L -1 The pH was adjusted to 10 with NaOH solution. After stirring for 5 min, the obtained colloidal precipitate was divided into centrifuge tubes and washed twice with deionized water, followed by centrifugation, and the obtained precipitate was dried in an oven at 80° C. for 6 h. Put the obtained green powder into a muffle furnace for calcination at 270°C for 2 hours to obtain black powder NiO x Nanoparticles. NiO x Nanoparticles were dispersed in deionized water (20mg / mL), and NiO x nanoparticle dispersion. The NiO x The n...

Embodiment 2

[0042] Example 2: Preparation of lead-based perovskite solar cells using fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) anti-solvent.

[0043] In step 3 of Example 1, the chlorobenzene solution (2 mg / mL) of the fullerene derivative [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) was substituted for the pure chlorobenzene solution to prepare perovskite film. All the other steps and methods are exactly the same as in the foregoing embodiment 1.

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Abstract

The invention provides a method for preparing a perovskite film and the application of the perovskite film in a perovskite solar cell. The method comprises the steps of performing spin coating of a perovskite precursor solution on an ITO glass substrate by a one-step method at a speed of 4000 r, dropping a chlorobenzene solution with a dissolved n-type semiconductor material of a polymer side chain onto the substrate which is rotating at a high speed after the 8 seconds of spin coating, annealing at 100 DEG C for 30 min, and cooling to the room temperature to obtain the perovskite film. The structure of the perovskite solar cell comprises ITO / NiOx / PVK / PCBM / BCP / Ag from top to bottom. According to the invention, the nucleation of a perovskite crystal can be promoted, the number of grain boundaries is reduced, the grain boundary defects are passivated, and therefore, the effects of optimizing the morphology of the perovskite film and improving the performance of the device are achieved. The n-type doping can be formed to improve the conductivity of a semiconductor, the charge transfer is facilitated, the recombination is reduced, the hysteresis in battery device performance can be avoided, and the stability is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of new material solar cells. Background technique [0002] In recent years, organic-inorganic hybrid ABX 3 (X is I - , Br - , Cl - ; A is methylamine MA + , formamidine FA + , Cs + , Rb + etc.; B is Pb 2+ , Sn 2+ etc.) type perovskite (Perovskite, PVK) solar cells have attracted much attention due to their simple preparation process, low cost, solution processing for large-scale production and excellent photoelectric conversion performance. In just a few years, perovskite solar cells The research of batteries has developed rapidly, and its certified photoelectric conversion efficiency has increased from the initial 3.8% to the current 23.7% [http: / / www.nrel.gov / pv / assets / pdfs / pv-efficiency-chart.20181214.pdf ]. However, there are often many grain boundaries and defects in perovskite thin films. The grain boundaries are full of charge trap states, which will increase non-radiative recombination, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/48H01L51/42
CPCY02E10/549
Inventor 胡婷陈义旺付青霞谈利承
Owner NANCHANG UNIV
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