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Perovskite solar cell based on amino compound interface modification layer, and preparation method thereof

A technology of interface modification layer and amine-based compound, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve problems such as poor effect and the efficiency of perovskite solar cells needs to be improved

Pending Publication Date: 2021-11-12
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used Lewis acids / bases for interface modification of perovskite crystals in this field are diethanolamine, tri-n-octylphosphine oxide, thiophene, and pyridine, etc., but the effect of these substances on improving the stability of perovskite is still poor. Titanium solar cell efficiency still needs to be improved

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  • Perovskite solar cell based on amino compound interface modification layer, and preparation method thereof
  • Perovskite solar cell based on amino compound interface modification layer, and preparation method thereof
  • Perovskite solar cell based on amino compound interface modification layer, and preparation method thereof

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preparation example Construction

[0036] The present invention also provides the preparation method of the perovskite solar cell based on the amino compound interface modification layer described in the above scheme, comprising the following steps:

[0037] On the surface of the base layer, an electron transport layer, a perovskite light-absorbing layer, an interface modification layer, and a hole transport layer are sequentially prepared; on the surface of the hole transport layer, a counter electrode is evaporated to obtain a perovskite based on an amino compound interface modification layer. Solar battery.

[0038] In the present invention, an electron transport layer is firstly prepared on the surface of the base layer. In the present invention, before preparing the electron transport layer, it is preferred to firstly clean the substrate layer and then perform ozone treatment and plasma surface treatment. In the present invention, the method of cleaning is preferably: sequentially use detergent, deionized...

Embodiment 1

[0049] The structure of the perovskite solar cell device based on the interface modification layer of cyclohexylethylamine prepared in this example is expressed as: FTO / TiO 2 / [Cs 0.05 (MA 0.17 FA 0.83 ) 0.95 Pb(I 0.83 Br 0.17 ) 3 ] / cyclohexylethylamine / Spiro-OMeTAD / Au.

[0050] The preparation method of the above-mentioned perovskite solar cell is as follows:

[0051] (1) Sequentially ultrasonically clean the FTO glass substrate with detergent, deionized water and absolute ethanol for 20 minutes, and then dry it in a drying oven at 70°C; Plasma treatment and 30min ozone treatment;

[0052] (2) Spin-coat TiO on the FTO glass substrate surface treated through step (1) 2 Solution (the solvent is toluene, the concentration is 0.5 mg / mL), the rotation speed is 4000 rpm, the time is 20 seconds, and annealed at 500 ° C for 30 min to form an electron transport layer;

[0053] (3) methylammonium iodide, lead iodide, potassium bromide, cesium iodide, formamidine iodide are ad...

Embodiment 2

[0060] The perovskite solar cell device structure based on the cyclohexylethylamine interface modification layer in this example is expressed as: FTO / TiO 2 / [Cs 0.05 (MA 0.17 FA 0.83 ) 0.95 Pb(I 0.83 Br 0.17 ) 3 ] / cyclohexylethylamine / Spiro-OMeTAD / Au.

[0061] In the preparation step, other steps are the same as in Example 1, only the concentration of cyclohexylethylamine in the precursor solution in step (4) is changed to 0.5 mg / mL.

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Abstract

The invention relates to the technical field of novel photovoltaic solar cells, and provides a perovskite solar cell based on an amino compound interface modification layer, and a preparation method thereof. The perovskite solar cell provided by the invention sequentially comprises a substrate layer, an electron transport layer, a perovskite light absorption layer, an interface modification layer, a hole transport layer and a counter electrode from bottom to top, and the preparation raw materials of the interface modification layer comprise an amino compound containing a cyclic group. The interface modification layer is formed by the amino compound containing the annular group, the photoelectric conversion efficiency of the perovskite solar cell can be effectively improved, the resistance of a device to humidity can be remarkably improved while non-radiative recombination of carriers is inhibited, and the efficiency and the stability of the device are improved.

Description

technical field [0001] The invention relates to the technical field of novel photovoltaic solar cells, in particular to a perovskite solar cell based on an amino compound interface modification layer and a preparation method thereof. Background technique [0002] Perovskite solar cells have excellent photoelectric properties and are currently one of the most important photovoltaic technologies. The certified power conversion efficiency of perovskite solar cells has rapidly increased from about 3.8% to more than 25.5% in just a few years. Organic-inorganic lead halide perovskites have the advantages of high carrier mobility, tunable band gap, high absorption coefficient, and long carrier diffusion length, making them an economically viable alternative to silicon-based solar cells. However, the low efficiency and poor stability of organic-inorganic halide perovskite structured devices are the main problems hindering their practical application. [0003] It is well known that...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K71/40H10K85/654H10K30/151Y02E10/549
Inventor 谢奕明廖明月
Owner HUAQIAO UNIVERSITY