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Lead-free double perovskite solar cell and preparation method thereof

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

Active Publication Date: 2020-04-10
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 non-lead double perovskite material in the prior art due to Cs 2 AgBr 6 The wide optical bandgap of the optical bandgap leads to poor optical absorption ability and low photocurrent, which leads to the technical problem of low device efficiency. A kind of zinc-containing chlorophyll derivative Zn-chlorophyll (Zn-Chl) is provided as a hole transport layer. Sensitized Cs-based 2 AgBr 6 Lead-free double perovskite solar cell as perovskite light-absorbing layer and preparation method thereof

Method used

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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

[0051] The present invention provides a kind of preparation method of lead-free double perovskite solar cell, comprising the following steps:

[0052] 1) Treatment of transparent conductive glass cathode:

[0053] Pretreat the cleaned transparent conductive glass with ultraviolet ozone for 30 minutes;

[0054] 2) Preparation and treatment of electron transport layer:

[0055] Put the transparent conductive glass pretreated by UV ozone in step 1) in a homogenizer, spin-coat the colloidal solution of the electron transport layer at a speed of 3000rpm for 30s, and then place it on a hot stage for annealing treatment. The annealing temperature and time are 150 ℃ annealing for 30 minutes; UV ozone treatment for 30 minutes after annealing;

[0056] 3) Preparation of perovskite layer:

[0057] The perovskite precursor Cs 2 AgBr 6 The solution was magnetically stirred on a hot stage at 100°C for 2 hours. After the solution dropped to room temperature, the perovskite precursor Cs ...

Embodiment 1

[0069] Sonicate the etched ITO with ITO cleaning agent, deionized water, acetone, alcohol, and isopropanol for 30 minutes, and then prepare SnO 2 colloid, the SnO 2 (15wt.%) hydrocolloid and deionized water are mixed at a volume ratio of 1:4 to obtain SnO 2 (3 wt.%) hydrocolloid. Place the ITO ultraviolet ozone pretreatment on the glue machine after 30 minutes, and the SnO 2 (3.0wt.%) colloid is spin-coated with the rotating speed of 3000rpm 30s, then is placed on the hot stage immediately and carries out annealing treatment, and its annealing temperature and time are 150 ℃ of annealing 30 minutes, then substrate is carried out ultraviolet ozone pretreatment 30 minutes. Preparation of Cs in a nitrogen glove box 2 AgBr 6 Precursor solution, 0.5mM BiBr 3 (224.3 mg) and 0.5 mMol of AgBr (93.9 mg) and 1 mMol of CsBr (212.8 mg) were dissolved in 1 mL of DMSO solution and stirred at 280° C. for 2 hours. Put the substrate into the glove box, spin-coat the perovskite precursor s...

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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 lead-free double perovskite material 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 sequentially comprises a transparent conductive glass cathode, an electron transport layer, a perovskite layer, a hole transport layerand a metal anode from bottom to top, the hole transport layer is a zinc-containing chlorophyll derivative Zn-Chl; and the perovskite layer is made of Cs2AgBiBr6. Zn-Chl is simultaneously used as a photosensitive material to contribute to optical absorption and photocurrent of the device. Compared with a device prepared on the basis of other non-photosensitive hole transport materials, the deviceprepared by the preparation method provided by the invention has the advantages that the photocurrent is improved by 22%-27%, the highest photoelectric conversion efficiency reaches 2.79%, and the device 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, and in particular relates to a Cs-based solar cell sensitized with zinc-containing chlorophyll derivative Zn-chlorophyll (Zn-Chl) as a hole 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 is a choice of many research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/371H10K30/15Y02P70/50
Inventor 王晓峰王宝宁于大明尤霆孟令军
Owner 储天新能源科技(长春)有限公司
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