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TiO2 nanotube-based perovskite cell electrode preparation method

A perovskite battery and nanotube technology, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve the problem of uncontrollable oblique growth of ZnO nanowires and affecting perovskite thin film solar cells Photoelectric conversion efficiency, difficulties and other issues, to achieve the effect of enhancing the steric hindrance effect

Active Publication Date: 2019-11-01
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0005] It has been reported in the literature that the seed crystal solution of zinc salt was spin-coated onto TiO-coated 2 The dense layer of FTO conductive glass surface is then decomposed to produce vertically grown ZnO seed crystals. Vertically arranged ZnO nanowires are grown by atmospheric pressure alkaline thermal deposition. However, the oblique growth of ZnO nanowires cannot be controlled to obtain regular opening TiO 2 There are still difficulties in nanotube arrays, which will inevitably affect the photoelectric conversion efficiency of perovskite thin film solar cells

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  • TiO2 nanotube-based perovskite cell electrode preparation method
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  • TiO2 nanotube-based perovskite cell electrode preparation method

Examples

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preparation example Construction

[0080] First bl-TiO 2 The preparation of dense layer (all adopt identically in the following examples):

[0081] Pretreatment, cleaning the FTO conductive glass substrate, that is, ultrasonic treatment with methanol, ethanol, and deionized water respectively, and after drying, prepare bl-TiO 2 Floor.

[0082] Preparation of 0.1M and 0.2M titanium solutions: Weigh 4.86g and 9.72g of tetraisopropyl titanate respectively, and dissolve them in 100mL of n-butanol.

[0083] Use a 20-200μL pipette gun to pipette 80μL of 0.1M titanium solution and spin-coat it on the front of the FTO conductive glass at a speed of 3000r / min for 30s and dry at 125°C for 5min. After the covered film is cooled to room temperature, follow the same steps as above The 0.2M titanium solution was repeatedly spin-coated twice, and finally the three-time spin-coated glass substrate was calcined in a tube furnace at 500°C for 30min. Take it out directly after calcination, and get the front side coated with Ti...

example (1

[0084] Example (1): The multi-step seed crystal Spin-coating method is adopted. In example (1) preparation of zinc oxide (ZnO) nanowire arrays: Use a 20-200 μL pipette gun to pipette 80 μL of 5 mM zinc acetate ethanol solution according to the first 20 μL, the second 20 μL, the third 20 μL and the fourth 20 μL spin-coated on FTO conductive glass bl-TiO 2 dense layer surface. The rotating speed is 3000r / min, and the spin coating time is 30s. Then calcined in a tube furnace at 400° C. for 30 minutes to obtain a flat and uniform ZnO seed crystal film. The following is divided into the following steps.

[0085] (a) Vertically aligned ZnO one-dimensional nanowires were grown by atmospheric pressure alkaline thermal deposition method in 90 °C water bath. Corrosion control inhibitor hexamethylenetetramine (HMTA): 11~14mM, template agent polyethyleneimine (PEI): 1.6~2.5mM, zinc source zinc nitrate: 22~28mM, alkali ammonia water: 0.22~0.28M. And use a special glass cover to press ...

example (2

[0106] Adopt multi-step seed crystal Spin-coating method. In the process of example (1) growing vertically aligned ZnO one-dimensional nanowires by the normal-pressure alkaline thermal deposition method, the chemical deposition time was controlled to be 20 minutes, and the rest were the same.

[0107] Image 6 For the multi-step seed crystal {20μL (1st time) + 20μL (2nd time) + 20μL (3rd time) + 20μL (4th time)} Spin-coating method nano ZnO wire distribution SEM image (a) and cross section Figure (b), the chemical deposition time is 20 minutes.

[0108] Image 6 a shows the vertical growth of ZnO nanowires with a diameter of 160-190 nm; Image 6 The cross-sectional view of b shows that the ZnO nanowire arrays grown vertically are closely arranged, and the ZnO nanowires are 1.7-1.8 μm long, which is longer than the 0.8-0.9 μm ZnO nanowires grown in 10 minutes. The distance between the obtained ZnO rods and rods is only about 50nm, indicating that the seed distribution is ve...

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Abstract

The invention relates to a TiO2 nanotube-based perovskite cell electrode preparation method, which is characterized in that a spin coating method is adopted to perform two or four times of spin coating of a certain amount of a Zn(Ac)2 seed solution on the surface of FTO conductive glass plated with a TiO2 dense layer, and decomposition at 400 DEG C is carried out to generate a ZnO seed. Steric hindrance effects generated by the seed density are used to suppress oblique enhancement of nanowires, vertically-arranged ZnO nanowires grow by an atmospheric alkali thermal deposition method, isomorphous replacement between (NH4)2TiF6 and the ZnO nanowires is carried out, and a mesoporous TiO2 nanotube array is prepared. A CH3NH3PbI3 perovskite photosensitive layer is prepared by a two-step methodwith methylamine iodide as a raw material, a solid hole transport film with higher mobility is prepared through increasing the amount of doped lithium, the surface is plated with a gold film, and a counter electrode is formed. The photoelectric conversion efficiency is 11.8%, which provides the basis for practical deployment of high-efficiency and large-area perovskite solar cells.

Description

technical field [0001] The invention relates to a perovskite battery electrode, in particular to a TiO-based 2 The invention relates to a method for preparing a nanotube perovskite battery electrode, which belongs to the technical field of chemical industry. Background technique [0002] In just a few years, the cell efficiency of perovskite solar cells (PSCs) has increased from 3.8% to 22.10%, which is unprecedented in the field of photovoltaics. However, such high efficiencies come from cells with an area of ​​only 0.04-0.2 cm2, and few researchers have attempted to fabricate such cells with large areas. When the effective area is smaller, the measurement error will increase. Therefore, the use of small-area devices has aroused many people's doubts in the remarkable progress in the field of solar cells. Therefore, the evaluation of photovoltaic technology requires an effective area greater than 1 square centimeter. Currently, due to limited preparation methods, more tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48B82Y30/00
CPCB82Y30/00H10K30/152H10K30/151H10K30/81Y02E10/549
Inventor 杨宇翔倪超英黄艳韩晓宇殷红霞
Owner EAST CHINA UNIV OF SCI & TECH
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