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Perovskite solar cell based on undoped organic hole transport layer and preparation method

A technology of hole transport layer and solar cell, which is applied in the direction of circuits, photovoltaic power generation, electrical components, etc., can solve the problems of lack of device structure and preparation technology, reduce the probability of charge recombination at the interface, etc., achieve large-area thin film preparation, avoid The effect of reducing the probability of occurrence of device life problems

Inactive Publication Date: 2016-04-06
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

In addition, the compound also has a CH 3 NH 3 PB 3 The HOMO energy levels matched by perovskite materials, and its non-coplanar molecular configuration can inhibit the close contact between the perovskite active layer and the hole transport layer, reducing the probability of charge recombination at the interface. Reports on perovskite solar cells, thus their device structures and fabrication techniques are relatively lacking

Method used

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  • Perovskite solar cell based on undoped organic hole transport layer and preparation method
  • Perovskite solar cell based on undoped organic hole transport layer and preparation method
  • Perovskite solar cell based on undoped organic hole transport layer and preparation method

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preparation example Construction

[0048] see figure 2 and image 3 , a method for preparing a perovskite solar cell based on an undoped organic hole transport layer, comprising the following steps:

[0049] Step 1, cleaning the glass substrate with the fluorine-doped tin oxide FTO cathode and drying it with a nitrogen gun;

[0050] Step 2, Diisopropyl diacetylacetonate titanate TiAc solution with a mass fraction of 75% was diluted with 1-butanol, and the diluted solution was sonicated for 10-20 minutes to obtain 0.15mol / L and 0.3mol / L c-TiO 2 Precursor solution;

[0051] Step 3, c-TiO 2 The precursor solution is spin-coated on the fluorine-doped tin oxide FTO cathode glass substrate, including the first spin-coating of c-TiO with a concentration of 0.15mol / L on the cleaned substrate. 2 Precursor solution, the spin coating speed is 5000r / min, the spin coating time is 55s, and annealed on a hot stage at a temperature of 100-500°C for 5-20min;

[0052] Step 4, and then spin-coated c-TiO with a concentratio...

Embodiment 1

[0062] Fabricate a solar cell with a 2TPATPE hole transport layer thickness of 100nm.

[0063] Step 1, cleaning the substrate substrate;

[0064] Place the 1.9mm glass substrate with fluorine-doped tin oxide FTO in deionized water, acetone, absolute ethanol and deionized water for 10 minutes, and then blow it dry with a nitrogen gun;

[0065] Step 2, depositing c-TiO on the cleaned substrate 2 Electron transport layer;

[0066] 2a) Preparation of precursor solution:

[0067] First take 1.464mL of 75% mass fraction of diisopropyl diacetylacetonate titanate TiAc solution, add 18.536mL of 1-butanol to the solution for dilution, and sonicate the diluted solution for 15min to obtain 0.15mol / L c-TiO 2 Precursor solution;

[0068] Then take 2.928 mL of 75% mass fraction of diisopropyl diacetylacetonate titanate TiAc solution, add 18.536 mL of 1-butanol to the solution for dilution, and ultrasonicate the diluted solution for 15 minutes to obtain 0.3 mol / Lc-TiO 2 Precursor solu...

Embodiment 2

[0089] Fabricate solar cells with a 2TPATPE hole transport layer thickness of 200nm.

[0090] Step 1, place the 1.9mm quartz substrate containing fluorine-doped tin oxide FTO in deionized water, acetone, absolute ethanol and deionized water for 15 minutes for ultrasonic cleaning, and dry it with a nitrogen gun after cleaning;

[0091] Step 2, depositing c-TiO on the cleaned substrate 2 Electron transport layer;

[0092] 2.1) Preparation of precursor solution:

[0093] The concrete realization of this step is identical with step 2a) of embodiment 1;

[0094] 2.2) Spin coating c-TiO 2 Precursor solution:

[0095] First, spin-coat c-TiO with a concentration of 0.15mol / L on the cleaned substrate for the first time. 2 Precursor solution, spin-coating speed is 5000r / min, spin-coating time is 55s, and annealed on a hot stage at a temperature of 150°C for 5min;

[0096] Then, c-TiO with a concentration of 0.15mol / L was spin-coated 2 The second spin coating concentration of 0.3m...

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Abstract

The present invention discloses a perovskite solar cell based on an undoped organic hole transport layer and a preparation method. According to the present invention, a compound 2TPATPE is used as the hole transport layer of the perovskite solar cell; the material has high light transmittance and a good film-forming property; and a propeller-like molecular configuration of the compound can effectively suppress close contact between a photoactive layer and the hole transport layer, so that the occurrence probability of charge recombination at an interface is reduced, thereby improving an open-circuit voltage, a circuit current density and a fill factor of the perovskite solar cell and finally achieving high energy conversion efficiency of the perovskite solar cell. Furthermore, a mobility of the compound is high, so that the hole transport layer with a high hole mobility can be obtained without doping an ionic additive, thereby avoiding the problem of a service life of a device, which is caused by hydrophilicity of the ionic additive, and improving stability of the device when ensuring hole transporting performance of the material.

Description

【Technical field】 [0001] The invention belongs to the field of semiconductor devices, in particular to a perovskite solar cell based on an undoped organic hole transport layer and a preparation method. 【Background technique】 [0002] At present, with the continuous innovation of industry and information technology, the demand and consumption of energy in human society are increasing day by day. The rapidly growing demand for energy has accelerated the depletion of traditional energy sources such as coal and oil, causing serious environmental pollution. Therefore, the development and utilization of diversified and clean renewable energy is a common choice for all countries in the world when they face energy crisis and environmental pollution. As the most abundant energy resource in the world, solar energy has become the focus of new energy due to its clean, renewable and inexhaustible advantages. As a photoelectric conversion device, solar cells have received more and more a...

Claims

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Application Information

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IPC IPC(8): H01L51/44H01L51/46H01L51/42H01L51/48
CPCH10K71/12H10K85/60H10K85/615H10K30/80H10K30/00Y02E10/549
Inventor 习鹤马晓华吕玲郝跃郑晶静袁梦囝
Owner XIDIAN UNIV
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