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Porous skeleton layer preparation method and solar cell absorption layer preparation method

A technology for solar cells and porous skeletons, applied in the field of solar cells, can solve the problems of lack of integrated manufacturing process of absorption layer, and achieve the effects of improving crystal quality, increasing reaction rate and low cost

Pending Publication Date: 2020-09-04
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing perovskite absorbing layer produced by electro-atomization is limited to a single material, and there are still deficiencies in the overall preparation of the absorbing layer and the integrated integrated manufacturing process of the device.

Method used

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  • Porous skeleton layer preparation method and solar cell absorption layer preparation method
  • Porous skeleton layer preparation method and solar cell absorption layer preparation method
  • Porous skeleton layer preparation method and solar cell absorption layer preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0035] see Figure 1~3 , the application provides a method for preparing a porous skeleton layer, comprising the following steps:

[0036] 1) preparation of lead iodide (PbI 2 ) solution;

[0037] 2) Depositing the lead iodide solution on the substrate by electrohydrodynamic atomization (referred to as electrospray) to form a porous skeleton layer.

[0038] Electrospray can produce evenly dispersed PbI 2 Charged droplets, at the same time under the action of Coulomb force, the droplets are not easy to reunite, and by adjusting the process parameters, the deposition and crystallization on the substrate is realized to form porous PbI 2 Skeleton layer.

[0039] Electrospraying of PbI 2 The solution is spray deposited on the substrate by controlling the PbI 2 Liquid concentration and flow rate, working voltage, substrate heating temperature and other parameters are used to control the physical quantities such as droplet size, fog field angle, and film thickness, and finally ...

Embodiment

[0063] see Figures 1 to 7 , this application includes:

[0064] (1) Clean the substrate, ultrasonically clean the substrate glass with detergent, deionized water and acetone-ethanol solution, and then place the substrate under an infrared lamp to dry;

[0065] (2) If figure 2 and image 3 As shown, place the cleaned substrate on the electrospray deposition workbench, fill it with PbI 2 Solution, after adjusting the atomization voltage, substrate platform temperature and rotation speed, atomize and deposit PbI 2 Form a porous skeleton layer, the longer the atomization time, the PbI 2 the thicker the layer;

[0066] (3) If Figure 4 and Figure 5 As shown, the PbI 2 The MAI solution is atomized and deposited on the skeleton layer, so that the two can fully react to form perovskite grains. The size and distribution of the grains are related to the solution concentration, atomization voltage, substrate platform temperature, rotation speed, and atomization time. In the c...

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Abstract

The invention belongs to the technical field of solar cells, and particularly relates to a preparation method of a porous skeleton layer, and a preparation method of a solar cell absorption layer. Anexisting perovskite absorption layer manufactured through electric atomization is only limited to a single material, and the integrated manufacturing process of overall preparation of the absorption layer and integration of devices is still lacked. The invention provides a preparation method of a porous skeleton layer, wherein the preparation method comprises the following steps: 1) preparing a lead iodide solution; and 2) depositing the lead iodide solution on a substrate by adopting an electrohydrodynamic atomization method to form a porous skeleton layer. According to the invention, a leadiodide solution is atomized into nanoscale liquid drops, and lead iodide is directly deposited on a substrate to form a porous skeleton layer, so that the chemical reaction rate of methyl ammonium iodide and lead iodide and the growth rate of crystal grains of an absorption layer are accelerated; and the deposited methyl ammonium iodide fully permeates into the lead iodide to form the perovskite absorption layer, so that the perovskite light absorption layer can be produced in a large area at low cost, the reaction rate is remarkably increased, and the crystallization quality is effectively improved.

Description

technical field [0001] The application belongs to the technical field of solar cells, and in particular relates to a method for preparing a porous skeleton layer and a method for preparing a solar cell absorbing layer. Background technique [0002] The core of perovskite solar cells is the organic metal halide perovskite compound absorption layer. At present, the deposition techniques of perovskite absorption layer mainly include liquid phase one-step method, two-step method, dual-source vapor deposition method and gas-phase assisted solution method. Wait. Among them, the solution method is simple and economical, and is divided into one-step method and two-step method according to the deposition steps; the absorbing layer film prepared by the traditional one-step method is very sensitive to the film-forming conditions, and the morphology of the prepared perovskite film is difficult to control, which is easy to cause The device efficiency is uneven; the two-step method is a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48C03C17/22
CPCC03C17/22C03C2217/284C03C2218/112C03C2218/32H10K71/15H10K71/12Y02E10/549
Inventor 王莉裴跃琛罗钰冯学明张皓
Owner XI AN JIAOTONG UNIV
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