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Lead-free double perovskite solar cell and preparation method thereof

A solar cell and double perovskite technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low photocurrent, poor optical absorption ability, low device efficiency, etc., and achieve the effect of photocurrent improvement

Active Publication Date: 2021-03-26
储天新能源科技(长春)有限公司
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Problems solved by technology

[0004] The present invention will solve the problem based on Cs in the prior art 2 AgBr 6 The lead-free double perovskite solar cells due to Cs 2 AgBr 6 The wide optical bandgap of the compound leads to poor optical absorption ability and low photocurrent, which leads to technical problems of low device efficiency. A titanium dioxide sensitized with carboxy-chlorophyll derivatives Carboxy-Chlorophyll (C-Chl) is provided as a Cs-based 2 AgBr 6 Lead-free double perovskite solar cell as perovskite light-absorbing layer and preparation method thereof

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  • Lead-free double perovskite solar cell and preparation method thereof
  • Lead-free double perovskite solar cell and preparation method thereof
  • Lead-free double perovskite solar cell and preparation method thereof

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preparation example Construction

[0050] The present invention also provides a method for preparing a lead-free double perovskite solar cell, comprising the following steps:

[0051] 1) Treatment of transparent conductive glass cathode:

[0052] Pretreat the cleaned transparent conductive glass with ultraviolet ozone for 20 minutes;

[0053] 2) Preparation and treatment of electron transport layer:

[0054] Put the transparent conductive glass pretreated by ultraviolet ozone in step 1) in a homogenizer, spin-coat isopropyl titanate solution at a speed of 4000rpm for 30s, and then place it in a muffle furnace for annealing treatment, annealing temperature and time Anneal at 500°C for 30 minutes; spin coat the titanium dioxide nanoparticle colloid solution on the substrate after cooling down, rotate at 2000rpm for 30s, then place it in a muffle furnace for annealing, the annealing temperature and time are 500°C for 30 minutes; After annealing it was placed in TiCl 4 In the solution, keep the temperature and t...

Embodiment 1

[0066] The etched ITO was ultrasonically treated with ITO cleaning agent, deionized water, acetone, alcohol, and isopropanol for 30 minutes in sequence, and then an isopropyl titanate solution was prepared by adding deionized water, isopropyl titanate, and hydrochloric acid to Mix at a volume ratio of 100:10:1 to obtain an isopropyl titanate solution. Put the ITO UV ozone pretreatment for 30 minutes on the homogenizer, spin-coat the isopropyl titanate solution at a speed of 4000rpm for 30s, and then immediately place it in a muffle furnace for annealing treatment. The annealing temperature and time are 500°C Anneal for 30 minutes; Then configure the colloidal solution of titanium dioxide nanoparticles, mix the colloidal titanium dioxide particles and ethanol with a mass ratio of 1:2 to obtain a colloidal solution of titanium dioxide nanoparticles, spin-coat the colloidal solution of titanium dioxide nanoparticles with a speed of 2000rpm for 30 seconds, and then place it on the ...

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Abstract

The invention relates to a lead-free double perovskite solar cell and a preparation method thereof, and belongs to the technical field of perovskite solar cells. The technical problems that an existing Cs2AgBiBr6-based lead-free double-perovskite solar cell is poor in optical absorption capacity and low in photocurrent due to the fact that the optical band gap of Cs2AgBiBr6 is wide, and then the efficiency of a device is low are solved. The lead-free double perovskite solar cell is a solar cell based on Cs2AgBiBr6, wherein titanium dioxide sensitized by a carboxyl-containing chlorophyll derivative C-Chl is used as an electron transport layer of the solar cell. The C-Chll sensitized titanium dioxide contributes to the optical absorption and photocurrent of the device at the same time. Compared with a device prepared on the basis of other electron transport materials, the device prepared by the preparation method has the advantages that the light current is obviously improved, the highest photoelectric conversion efficiency reaches 3.11 percent, and the cell is a lead-free double perovskite solar cell with the highest efficiency at present.

Description

technical field [0001] The invention belongs to the technical field of perovskite solar cells, in particular to a Cs-based solar cell with a titanium dioxide film sensitized with carboxy-containing chlorophyll derivatives Carboxy-Chlorophyll (C-Chl) as an electron transport layer 2 AgBr 6 A lead-free double perovskite solar cell as a perovskite light-absorbing layer and a preparation method thereof. Background technique [0002] Perovskite solar cells have attracted widespread attention since their first appearance. Up to now, the highest energy conversion efficiency of perovskite solar cells has exceeded 25%. However, conventional MAPbI 3 The problems of perovskite containing lead element and poor long-term stability of the device have always restricted the large-scale commercial use of perovskite solar cells. To solve this problem, many research groups have turned their attention to developing new lead-free perovskite materials with low toxicity and high stability. It ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCH10K71/10H10K85/00H10K30/10H10K30/80H10K2102/00Y02E10/549
Inventor 王晓峰王保宁于大明尤霆袁林
Owner 储天新能源科技(长春)有限公司
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