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Perovskite solar cell based on PCBM-modified ZnO nano-rod array and preparation method of perovskite solar cell

A technology of solar cells and nanorod arrays, applied in nanotechnology, nanotechnology, nanotechnology, etc. for materials and surface science, can solve problems such as hindering the development of solar cells, efficiency attenuation, and instability of solar cells, and achieve good results. The effect of development prospect, reduction of energy loss, and low experiment cost

Inactive Publication Date: 2015-11-11
HUBEI UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The material of the skeleton layer mainly includes TiO 2 、Al 2 o 3 , ZrO 2 And ZnO, the current photoelectric conversion efficiency is relatively high with TiO 2 The perovskite absorbing layer is the material of the skeleton layer, and the solar cells composed of this perovskite absorbing layer are generally unstable, very sensitive to air, and the efficiency decays quickly. These adverse factors will seriously hinder the development of solar cells

Method used

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  • Perovskite solar cell based on PCBM-modified ZnO nano-rod array and preparation method of perovskite solar cell
  • Perovskite solar cell based on PCBM-modified ZnO nano-rod array and preparation method of perovskite solar cell
  • Perovskite solar cell based on PCBM-modified ZnO nano-rod array and preparation method of perovskite solar cell

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Example 1: ZnO nanorods / CH 3 NH 3 PB 3 Preparation of perovskite solar cells:

[0037] (1) Pretreatment of FTO: Cut the FTO glass sheet into square glass samples with an area of ​​2cm*2cm, then use deionized water, acetone, alcohol, and deionized water to carry out ultrasonic cleaning for 20 minutes, and the surface of the glass sheet Impurities are cleaned, and then cleaned with ultraviolet ozone (UV) for 15 minutes to remove organic matter attached to the surface.

[0038] (2) Preparation of ZnO seed layer: using methanol as solvent, prepare 3mmol / L zinc acetate (Zn(CH 3 COO) 2 ) solution, stirred for 10 minutes, and then started to spin-coat on the FTO glass sample at a rotation speed of 3000r / min for 15s, dried at 100°C for 15 minutes, and then transferred to a muffle furnace for annealing for 1h.

[0039] (3) Preparation of ZnO nanorods: grow ZnO nanorods in a water bath on the FTO glass sample with a ZnO seed layer, and the water bath solution composition is ...

Embodiment 2

[0044] Example 2: ZnO nanorods / PCBM / CH 3 NH 3 PB 3 Preparation of organic-inorganic hybrid perovskite solar cells:

[0045] (1), (2), (3) steps are identical with embodiment 1;

[0046] (4) Incorporation of PCBM: first, ZnO nanorods were cleaned with ultraviolet ozone (UV) for 15 minutes, and then a certain concentration of PCBM solution was prepared with chlorobenzene as a solvent, and PCBM was thrown into ZnO nanorods by spin coating, The spin-coating speed is 3000r / min, the spin-coating time is 10s, and then placed overnight in the glove box.

[0047] (5) Two-step synthesis of the perovskite layer (CH 3 NH 3 PB 3 ): The first step is to spin-coat PbI 2 , that is, using DMF (N,N-dimethylformamide) as a solvent to prepare 1mmol / L (0.462g) of PbI 2 solution, stirred at a constant temperature of 70°C for 4h, and then the PbI 2 Throw it on the PCBM layer, the spin coating speed is 3000r / min, and the time is 15s. After spinning, put it on the drying table and bake for 5m...

Embodiment 3

[0051] Example 3: PCBM / CH 3NH 3 PB 3 Fabrication of Structural Perovskite Solar Cells

[0052] (1) Pretreatment of FTO: Cut the FTO glass sheet into square glass sheets with an area of ​​2cm*2cm, then use deionized water, acetone, alcohol, and deionized water to carry out ultrasonic cleaning for 20 minutes, and the surface of the glass sheet Impurities are cleaned, and then cleaned with ultraviolet ozone (UV) for 15 minutes to remove organic matter attached to the surface.

[0053] (2) Preparation of ZnO seed layer: using methanol as solvent, prepare 3mM zinc acetate (Zn(CH 3 COO) 2 ) solution, stirred for 10 minutes, and then started spin-coating at a rotation speed of 3000r / min for 15s, dried at 100°C for 15 minutes, and then transferred to a muffle furnace for annealing for 1h.

[0054] (3) Incorporation of PCBM: first, ZnO nanorods were cleaned with UV for 15 minutes, and with chlorobenzene as a solvent, a PCBM solution with a concentration of 2--2.5wt% was prepared, ...

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Abstract

The invention relates to an organic and inorganic-hybrid perovskite solar cell based on a ZnO / PCBM / CH3NH3PbI3 light-absorbing layer, and a preparation method of the perovskite solar cell. The solar cell is composed of a glass substrate, an FTO layer served as a cell anode, a ZnO seed layer, a ZnO nano-rod skeleton layer, an organic PCBM layer, a perovskite layer, a Spiro-MeOTAD hole transporting layer and an Au film layer served as a cell cathode. The perovskite solar cell is simple and convenient in preparation method, low in requirement of reaction conditions and obvious in effect. On the premise that the high efficiency is still maintained, the performance stability problem can be overcome to some extent. Based on the above structure, organic materials and inorganic materials are effectively combined, while the advantages of organic materials and the advantages of inorganic materials are given full play to. Therefore, a novel means is provided for the development of perovskite solar cells.

Description

technical field [0001] The invention relates to the field of semiconductor nanomaterial technology and perovskite solar cell technology, in particular to a method using organic PCBM (fullerene derivative C 72 h 14 o 2 C 72 h 14 o 2 ) to modify the ZnO nanorod array to form the electron transport layer, and the CH 3 NH 3 PB 3 Thin-film perovskite solar cells and their fabrication process. Background technique [0002] In recent years, perovskite solar cells have developed rapidly, and their photoelectric conversion efficiency has increased from the initial 3.81% to 19% [1-3], and even some reports have reached more than 20%. Perovskite solar cells have become the current research Hot spots for solar cells. Perovskite materials have a suitable and easily adjustable band gap (such as CH 3 NH 3 PB 3 1.5eV, CH 3 NH 3 PbBr 3 2.3eV, etc.)[4], higher absorption coefficient (>10 4 cm -1 )[5-6], excellent carrier transport performance, and good tolerance to impurit...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y30/00
CPCB82Y30/00H10K85/215H10K30/152H10K2102/101Y02E10/549
Inventor 王浩喻继超许扬张军李兆松周海段金霞
Owner HUBEI UNIV
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