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Perovskite precursor solution and preparation method thereof, and application

A technology of perovskite precursors and solutions, which is applied in semiconductor/solid-state device manufacturing, electric solid-state devices, semiconductor devices, etc., to achieve the effects of high photoelectric conversion efficiency, convenient preparation and good stability

Active Publication Date: 2018-07-20
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the defects in the prior art, and to provide a precursor solution that has low requirements on the process environment in the battery preparation process and can maintain stable properties for a long time in an ordinary environment

Method used

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  • Perovskite precursor solution and preparation method thereof, and application
  • Perovskite precursor solution and preparation method thereof, and application

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Embodiment 1

[0050] The perovskite precursor is prepared according to the above method. The specific ratio of each component material is as follows: methylammonium iodide 2.97%, methylamine bromide 1.16%, formamidine iodide 7.49%, lead iodide 33.74%, lead bromide 3.79% , dimethyl sulfoxide 5.75%, N,N-dimethylformamide 17.36%, γ-butyrolactone 27.74%.

[0051] According to the preparation method in Product Example 1, the perovskite precursor solution is prepared for later use. The solution needs to be stirred continuously in an environment of 55~60°C. Then the solar cell is prepared according to the above method, and the efficiency test of the prepared solar cell is carried out. The open circuit voltage used in the test: 1.12V, the current density: 23.9mA / cm 2 ,Such as figure 1 As shown, the obtained solar cell efficiency: 17.01%, has a relatively high photoelectric conversion efficiency.

[0052] Stability test:

[0053] After placing the prepared perovskite precursor solution in a norm...

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Abstract

The invention discloses a perovskite precursor solution and an application thereof for preparing a solar cell. The perovskite precursor solution comprises the following components, by mass: 2.56% to 9.46% of methanaminium iodide, 0.13% to 2.35% of methylamine bromide, 3.54% to 11 .90% of formamidine iodide, 28.63% to 53.60% lead iodide, 2.44% to 7.70% of lead bromide, 0 to 10.20% of formamidine chloride, 2.61% to 11 .68% of dimethyl sulfoxide, 14.79% to 35.02% of N,N-dimethylformamide, and 16.85% to 42.49% of gamma-butyrolactone. According to the invention, a light absorption layer of a perovskite solar cell is prepared by using a perovskite precursor solution; spinning coating is carried out in an open atmosphere environment, so that preparation becomes convenient; and after spinning coating, the product is transferred to a vacuum environment to form a non-porous dense large-crystalline-grain-size perovskite light absorbing layer. The high photoelectric conversion efficiency is realized.

Description

technical field [0001] The invention belongs to the field of micro-nano photoelectric materials, in particular to a solar cell material based on a perovskite structure. Background technique [0002] As a stable energy supplier in new energy sources, solar energy is a research hotspot in scientific research and other industries. Composite silicon solar cells are mostly available on the market, but composite silicon solar cells have high production costs, strict environmental requirements, low recycling efficiency of silicon crystals, and high recycling costs, all of which are disadvantages of silicon crystal solar cells. For solar cells based on perovskite-structured CH3NH3PbX3 (X represents halogen elements), the perovskite light-absorbing layer is the core of the solar cell. Compared with other perovskite-like light-absorbing layers Photoelectric materials have the advantages of low cost, simple manufacturing process, and high current; and the photoelectric conversion ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K71/15H10K30/151Y02E10/549
Inventor 曹晖陈力洪顶豪罗玉鑫张明道陶涛
Owner NANJING UNIV OF INFORMATION SCI & TECH
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