A perovskite solar cell and a preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve problems such as poor thermal stability and achieve the effect of improving thermal stability

Inactive Publication Date: 2018-12-11
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the prior art, zinc oxide in the perovskite solar cell produces a reverse proton decomposition reaction during the formation of the perovskite light-absorbing layer, which decomposes the perovskite and has the problem of poor thermal stability.

Method used

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  • A perovskite solar cell and a preparation method thereof
  • A perovskite solar cell and a preparation method thereof
  • A perovskite solar cell and a preparation method thereof

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[0034] The present invention also provides the preparation method of the perovskite solar cell described in the above technical scheme, comprising the following steps:

[0035] (1) Under ultrasonic conditions, the transparent conductive glass substrate is washed with detergent, acetone, isopropanol, ethanol, and deionized water in sequence, and then dried with nitrogen to obtain a pretreated substrate;

[0036] (2) Spin coating the zinc oxide precursor solution on the surface of the pretreated substrate to obtain FTO / ZnO;

[0037] (3) Soak the FTO / ZnO obtained in the step (2) in a CdS solution to obtain FTO / ZnO / CdS;

[0038] (4) the surface of the CdS layer of FTO / ZnO / CdS obtained in the step (3) is spin-coated with CH 3 NH 3 PB 3 After the perovskite precursor solution is annealed, FTO / ZnO / CdS / CH 3 NH 3 PB 3 ;

[0039] (5) FTO / ZnO / CdS / CH obtained in said step (4) 3 NH 3 PB 3 Middle CH 3 NH 3 PB 3 The surface of the layer is spin-coated with the hole transport lay...

Embodiment 1

[0069] The FTO glass was ultrasonically cleaned with detergent, acetone, isopropanol, ethanol, and deionized water for 30 min in sequence, and then the glass was blown dry with a nitrogen gun and treated with oxygen plasma for five minutes before use.

[0070] 0.29g of KOH was dissolved in 13mL of methanol solution to prepare solution 1; 0.59g of Zn(CH 3 COO) 2 2H 2 O was added to 25 mL of methanol solution, stirred and dissolved in a water bath at 65°C to form solution 2; solution 1 was added dropwise to solution 2, and stirred for 2.5 hours under water bath conditions, and the obtained nanoparticles were washed with methanol for 2 to 3 hours. In order to remove residual ions, the nanoparticles were dissolved in 14mL n-butanol, 1mL methanol, and 1.5mL chloroform to form a ZnO precursor solution to obtain a zinc oxide precursor solution. filter.

[0071] Take 100 μL of the above ZnO precursor solution and spin-coat it onto a clean FTO glass substrate at a spin-coating speed...

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Abstract

The invention provides a perovskite solar cell belonging to the field of solar cells. The perovskite solar cell provided by the invention uses cadmium sulfide as a barrier layer, As that direct contact between the zinc oxide and the perovskite light absorb layer is hinder, the thermal stability of the perovskite solar cell is improved, and cadmium sulfide matches the crystal lattice of zinc oxideand CH3NH3PbI3 perovskite light-absorbing layer, CdS has excellent photoelectric properties and is compatible with planar perovskite solar cells, which not only improves the thermal stability, but also keeps the photoelectric conversion efficiency of perovskite solar cells. The results show that the efficiency of perovskite solar cells is 14.92 + / - 0. 62%, the current density is 19.16 + / -1. 51 mA / cm2, the open circuit voltage is 1.04 + / - 0. 2 V, and the filling factor is 66.87 + / - 3. 31%. The thermal stability of perovskite solar cells annealed at 100 DEG C is good.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a perovskite solar cell and a preparation method thereof. Background technique [0002] In the modern society where energy is scarce, in order to maintain the sustainable development of human beings, people have been devoting themselves to the research of new energy. Among various new energy sources, solar energy is undoubtedly one of the most ideal energy sources as a clean, environmentally friendly and cheap renewable energy source. There are many ways to utilize solar energy, among which the photoelectric effect has received widespread attention. At present, about 85% of the market share of solar cells is occupied by silicon solar cells, but due to its high price, its application prospects are seriously restricted. In recent years, as a new type of solar cell, perovskite solar cells have attracted the attention of many researchers. Since the first report in 2009, its pho...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y40/00
CPCB82Y40/00H10K71/00H10K30/35H10K30/353H10K2102/00Y02E10/549Y02P70/50
Inventor 李金华杨子璐王贤保王建颖梅涛
Owner HUBEI UNIV
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