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A kind of mo-titanium dioxide-agnws flexible perovskite solar cell and its preparation method

A solar cell, mo-tio2-agnws technology, applied in the field of solar cells, can solve the problems of limited application range, incompatibility with flexible substrates, etc., to achieve the effect of expanding application range, realizing large-scale preparation, and promoting rapid development

Active Publication Date: 2020-02-04
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electron transport layer used is mainly TiO 2 , ZnO, SnO 2 and Zn 2 SnO 4 etc. These metal oxides need to be annealed at high temperature to form a good crystalline state, and are mostly deposited on hard linings such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO) and aluminum-doped zinc oxide (AZO). On the bottom, it is not compatible with flexible substrates, which limits its application range

Method used

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  • A kind of mo-titanium dioxide-agnws flexible perovskite solar cell and its preparation method
  • A kind of mo-titanium dioxide-agnws flexible perovskite solar cell and its preparation method
  • A kind of mo-titanium dioxide-agnws flexible perovskite solar cell and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] Mo-TiO 2 -AgNWs flexible perovskite solar cell preparation method, comprising the following steps:

[0035] (1) The purchased poly(3,4-ethylenedioxythiophene)-polystyrenesulfonic acid (PEDOT:PSS) was deposited (thickness about 15 nm) on the PET substrate to improve the contact between AgNWs and the substrate; 5 mg ultrafine AgNWs (diameter≤20 nm dispersed into 5.5ml EMIMBF 4 and ultrapure water (volume ratio 1:10) in a mixed solution, and continuously stirred for 10 min to obtain a uniform dispersion of AgNWs (the scanning electron microscope picture is shown in figure 1 As shown in a, it shows that AgNWs in EMIMBF 4 The AgNWs solution was deposited on PEDOT:PSS by spin-coating deposition technology, and kept at 80 °C for 1 h to completely evaporate the water to obtain the AgNWs electrode (thickness 45 nm).

[0036] (2) Mo-TiO 2 - Preparation of AgNWs electron transport layer

[0037] a. Dissolve 11.72 g of titanium isopropoxide into 2.4 g of acetic acid solution, ...

Embodiment 2

[0045] For Mo-TiO 2 -AgNWs electron transport layer, gradually increasing the mole percentage of AgNWs (based on Mo-TiO 2 and the total amount of AgNWs, the addition amount of AgNWs is 0.0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6 mol%, corresponding to the photoelectric conversion efficiency of perovskite solar cells showing a trend of first increasing and then decreasing, and other Same as Example 1, the photoelectric conversion efficiency of the perovskite solar cell changes with the AgNWs mole fraction (mol%) and the relationship curve is as follows Figure 4 (a) shown. It shows that the introduction of an appropriate amount (0.2~1.6mol%) of AgNWs can significantly improve the Mo-TiO 2 Electron transport characteristics, photoelectric conversion efficiency increased from 12.85% to 14.53% (AgNWs addition amount is 1.0mol%), improving photoelectric conversion efficiency; (b) is Mo-TiO 2 - The photoelectric conversion efficiency retention rate of AgNWs perovskite solar cells...

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Abstract

For the preparation of Mo‑TiO-based 2 ‑AgNWs flexible perovskite solar cells, first, the purchase of ultrafine silver nanowires dispersed into ionic liquid (EMIMBF 4 ) and ultrapure water (volume ratio 1:5~10), stirring continuously to disperse AgNWs evenly, and using spin-coating deposition technology to deposit AgNWs on a polybutylene terephthalate (PET) substrate to obtain a transparent electrode ; secondly, in TiO 2 Simultaneous introduction of Mo ion doping and AgNWs into the precursor solution, spin-coating deposition to obtain MoTiO 2 ‑AgNWs electron transport layer, followed by deposition of C 60 self-assembled monolayer; finally, a two-step sequential method was used to deposit CH 3 NH 3 I solution and PbI 2 solution to get CH 3 NH 3 PB 3 , a hole transport material (Spiro‑OMeTAD) was deposited by spin coating, and an Au counter electrode was deposited by vacuum evaporation.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a Mo-TiO 2 -AgNWs flexible perovskite solar cell and its preparation method. Background technique [0002] Compared with energy sources such as fossil and nuclear energy, solar energy is one of the most abundant renewable energy sources and is the least harmful to the environment. An ideal solar cell should not only have low cost, no failure, abundant material resources, good stability, high photoelectric conversion efficiency, but also easy to achieve large-area integration. Currently, crystalline Si-based solar cells have occupied 80-85% of the solar photovoltaic market, but high manufacturing costs limit their mass production. In recent years, the photoelectric conversion efficiency of organic-inorganic hybrid perovskite solar cells has rapidly increased from the initial 3.8% to more than 21.0%, and it is most likely to replace Si-based solar cells. However, the electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K30/151H10K2102/101H10K2102/00Y02E10/549
Inventor 刘向阳徐建斌牛晨顾玉宗
Owner HENAN UNIVERSITY
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