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Solar cell based on energy level adjustable nickel oxide hole transport layer and preparation method

A technology of hole transport layer and solar cell, applied in nanotechnology, circuit, photovoltaic power generation, etc. for materials and surface science, can solve the problems of difficult dispersion and control of nanoparticles, achieve good dispersion and prevent recombination , The effect of improving the hole transport characteristics

Pending Publication Date: 2022-01-07
WUHAN UNIV
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Problems solved by technology

In addition, the traditional method uses sodium hydroxide to adjust the pH to synthesize nickel oxide nanoparticles. Only when the pH value is fixed at 10 can the ideal nickel oxide nanoparticles be synthesized, which is difficult to control and the synthesized nanoparticles are difficult to disperse. It is also a great challenge to prepare efficient, highly dispersed and pH-range-tunable nickel oxide nanoparticle hole transport layers.

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  • Solar cell based on energy level adjustable nickel oxide hole transport layer and preparation method
  • Solar cell based on energy level adjustable nickel oxide hole transport layer and preparation method
  • Solar cell based on energy level adjustable nickel oxide hole transport layer and preparation method

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preparation example Construction

[0040] The present invention also provides a method for preparing a trans-lead-based perovskite solar cell based on a highly dispersed nickel oxide nanoparticle hole transport layer that can be stably synthesized in a wide pH range and has an adjustable energy level. Include the following steps:

[0041] Step 1: preparing a nickel oxide nanoparticle dispersion;

[0042] (1) 40~50mmol nickel nitrate hexahydrate is dissolved in 100mL deionized water; 4 parts of dark green precursor solutions are prepared, then use 25% 4 methyl ammonium hydroxide aqueous solution, 4 ethyl ammonium hydroxide aqueous solution, 4 Propyl ammonium hydroxide aqueous solution and 4 butyl ammonium hydroxide aqueous solution are used to adjust the pH value of the precursor solution to obtain the precursor solution;

[0043] (2) Aging the precursor solution for 12 hours, centrifuging the obtained precipitate at a centrifugal rate of 5000-7000rmp / s for 5-10min; washing with deionized water for 5 times, and...

Embodiment 1

[0070] Step 1: preparing a nickel oxide nanoparticle dispersion;

[0071] (1) 40~50mmol nickel nitrate hexahydrate is dissolved in 100mL deionized water; the dark green precursor solution is prepared, and then the pH value of the precursor solution is adjusted to 4~7 with 25% 4 methyl ammonium hydroxide aqueous solution respectively to obtain Precursor solution;

[0072] (2) Aging the precursor solution for 12 hours, centrifuging the obtained precipitate at a centrifugal rate of 5000-7000rmp / s for 5-10min; washing with deionized water for 5 times, and drying the obtained product in a vacuum drying oven, The vacuum drying temperature is 80-100° C., and the drying time is 10-24 hours; after the dried product is obtained, the dried product is ground and placed in a muffle furnace for sintering at 200-400° C. for 30-120 minutes. The calcined product is nickel oxide nanoparticles (NiOx:TMAOH).

[0073] The obtained nickel oxide nanoparticles are dispersed in deionized water or it...

Embodiment 2

[0090] Step 1: preparing a nickel oxide nanoparticle dispersion;

[0091] (1) 40~50mmol nickel nitrate hexahydrate is dissolved in 100mL deionized water; the dark green precursor solution is prepared, and then the pH value of the precursor solution is adjusted to 4~7 with 25% 4 ethyl ammonium hydroxide aqueous solution respectively to obtain Precursor solution;

[0092] (2) Aging the precursor solution for 12 hours, centrifuging the obtained precipitate at a centrifugal rate of 5000-7000rmp / s for 5-10min; washing with deionized water for 5 times, and drying the obtained product in a vacuum drying oven, The vacuum drying temperature is 80-100° C., and the drying time is 10-24 hours; after the dried product is obtained, the dried product is ground and placed in a muffle furnace for sintering at 200-400° C. for 30-120 minutes. The calcined product was nickel oxide nanoparticles (NiOx:TEAOH).

[0093] Step 3: preparing a nickel oxide nanoparticle hole transport layer.

[0094] ...

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Abstract

The invention discloses a solar cell based on an energy level adjustable nickel oxide hole transport layer and a preparation method. The perovskite solar cell comprises transparent conductive glass, a hole transport layer, an interface function passivation layer, a perovskite absorption layer, an electron transport layer, an interface modification layer and an electrode from bottom to top in sequence. And the hole transport layer is a nickel oxide nano-particle film with the diameter of 2-5nm. The preparation method comprises the following steps: cleaning and blow-drying ITO glass to prepare an ITO glass substrate; preparing a nickel oxide nanoparticle hole transport layer; preparing an interface function passivation layer; preparing a perovskite thin film; preparing an electron transport layer on the perovskite layer; preparing an interface modification layer on the electron transport layer; and preparing a metal electrode on the interface modification layer to obtain the solar cell. The photoelectric conversion efficiency of the cell is 19.87%, and the cell has good ultraviolet stability.

Description

technical field [0001] The invention relates to the technical field of perovskite cells, in particular to a solar cell based on an energy-level adjustable nickel oxide hole transport layer and a preparation method thereof. Background technique [0002] Perovskite solar cells (PSCs) have attracted much attention in recent years due to their facile fabrication, excellent power conversion efficiency (PCE), and low-cost production. The certified PCE increased by 25.2% from the initial 3.8%, mainly due to material innovation, new thin film deposition process and device structure design. The ambipolar semiconducting optical properties of perovskites make it possible to design different device structures. Among them, planar inverted devices have attracted extensive attention due to their low-temperature solution processing and simpler device structures, and have the potential to become commercial photovoltaic devices. [0003] Nickel oxide (NiOx) is the most suitable for planar i...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/42H01L51/48B82Y30/00
CPCB82Y30/00H10K71/00H10K30/30H10K2102/00Y02E10/549
Inventor 台启东崔霞霞金俊君
Owner WUHAN UNIV
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