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Star polymer-doped perovskite solar cell and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problem of not being able to simultaneously improve the efficiency and stability of perovskite solar cells

Inactive Publication Date: 2021-11-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the existing method of adding small molecules or polymers to modify the perovskite film cannot improve the efficiency and stability of perovskite solar cells at the same time, and provides a star-shaped polymer doped Perovskite solar cell and preparation method thereof

Method used

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  • Star polymer-doped perovskite solar cell and preparation method thereof
  • Star polymer-doped perovskite solar cell and preparation method thereof
  • Star polymer-doped perovskite solar cell and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0086] 1) Treatment of ITO glass: First, use detergent to clean the surface of ITO glass with a size of 15mm×15mm and an impedance of 10Ω / sq, and then wash it in deionized water containing detergent, acetone and absolute ethanol in turn. Ultrasonic treatment for 15 minutes, then dry with nitrogen, and finally UV treatment of ITO glass for 15 minutes;

[0087] 2) Spin coating of hole transport layer: the present invention uses NiOx as hole transport material, the NiOx solution that is about to prepare is drip-coated on the ITO glass that step 1) is processed, with the speed spin coating of 2000r / min 40 seconds , followed by annealing in air at 100°C for 10 min, and slowly cooling to room temperature to obtain a dense NiOx hole transport layer;

[0088] 3) The perovskite light-absorbing layer was prepared by POSP modification (in order to compare with the comparative example, this part also carried out the preparation of three types of perovskite light-absorbing layers respectiv...

Embodiment 2

[0102] 1) First, clean the ITO glass surface with a size of 15mm×15mm and an impedance of 10Ω / sq with detergent, then ultrasonically treat it in deionized water containing detergent, acetone, and absolute ethanol for 15 minutes, and then Blow dry with nitrogen, and finally UV-treat the ITO glass for 15 minutes;

[0103] 2) Spin coating of hole transport layer: the present invention uses NiOx as hole transport material, the NiOx solution that is about to prepare is drip-coated on the ITO glass that step 1) is processed, with the speed spin coating of 2000r / min 40 seconds , followed by annealing in air at 100°C for 10 min, and slowly cooling to room temperature to obtain a dense NiOx hole transport layer;

[0104] 3) The perovskite light-absorbing layer was prepared by POSP modification (in order to compare with the comparative examples and the foregoing examples, this part also carried out the preparation of three types of perovskite light-absorbing layers respectively)

[010...

Embodiment 3

[0118] 1) Treatment of ITO glass: First, use detergent to clean the surface of ITO glass with a size of 15mm×15mm and an impedance of 10Ω / sq, and then wash it in deionized water containing detergent, acetone and absolute ethanol in turn. Ultrasonic treatment for 15 minutes, then dry with nitrogen, and finally UV treatment of ITO glass for 15 minutes;

[0119] 2) Spin coating of hole transport layer: the present invention uses NiOx as hole transport material, the NiOx solution that is about to prepare is drip-coated on the ITO glass that step 1) is processed, with the speed spin coating of 2000r / min 40 seconds , followed by annealing in air at 100°C for 10 min, and slowly cooling to room temperature to obtain a dense NiOx hole transport layer;

[0120] 3) The perovskite light-absorbing layer was prepared by POSP modification (in order to compare with the comparative examples and the foregoing examples, this part also carried out the preparation of three types of perovskite ligh...

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Abstract

The invention provides a star polymer-doped perovskite solar cell and a preparation method thereof, and solves the technical problem that the efficiency and stability of the perovskite solar cell cannot be improved at the same time in the existing method for modifying a perovskite thin film by adding small molecules or polymers. According to the invention, firstly, a star-shaped polyhedral oligomeric silsesquioxane-poly (methyl methacrylate) is synthesized based on molecular design, and a star-shaped polymer POSP is added into a lead-based perovskite thin film through an anti-solvent method for the first time, on one hand, C = O in the POSP polymer and Pb in perovskite form a chelation effect to passivate perovskite crystal boundary and surface defects, and non-radiative recombination and charge transfer loss are inhibited; and on the other hand, the interaction between the POSP and the perovskite material slows down the growth of perovskite crystals, so that the randomly formed atomic nucleus adjusts the growth orientation of the perovskite crystals in the total Gibbs free energy minimization and thermodynamic optimal direction, thereby obtaining the perovskite film with a larger grain size.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a perovskite solar cell (Perovskite Solar Cells, PSCs) doped with a star polymer and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, the energy crisis and environmental pollution are becoming more and more serious, the development of clean, abundant and renewable energy is imminent. As a kind of clean energy, solar cells can be used by humans to directly convert light energy into electrical energy through photoelectric effect or photochemical reaction. This is a way to solve the energy crisis and has broad application prospects. Organic-inorganic hybrid perovskite materials have optoelectronic properties such as broad absorption spectrum, low exciton binding energy, high mobility, and long carrier lifetime, as well as low-cost preparation advantages that can be processed in low-temperature solution. re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F220/14C09D5/32C09D7/65H01L51/42H01L51/44H01L51/46H01L51/48
CPCC08F283/12C09D5/32C09D7/65H10K71/12H10K85/10H10K30/15H10K30/88C08F220/14Y02E10/549
Inventor 李炫华曹琦
Owner NORTHWESTERN POLYTECHNICAL UNIV