Method for preparing flexible perovskite solar cell at low temperature,

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of lower annealing temperature, high annealing temperature, and low cell efficiency, and achieve the effect of simple and controllable operation steps and simple process

Active Publication Date: 2019-09-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method solves the problem that the annealing temperature of the existing formamidine lead-iodine system perovskite solar cell is too high to be applied to a flexible substrate, or the battery efficiency is low due to lower anne

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  • Method for preparing flexible perovskite solar cell at low temperature,
  • Method for preparing flexible perovskite solar cell at low temperature,
  • Method for preparing flexible perovskite solar cell at low temperature,

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Embodiment 1

[0043] A method for preparing a light-absorbing layer of a perovskite solar cell, comprising the following steps:

[0044] Step 1. Select 1.5cm×1.5cm FTO conductive glass as the substrate, and use cleaning agent, acetone, ethanol and deionized water to clean it ultrasonically for 10 minutes. After cleaning, use nitrogen to dry the substrate, and then dry it. The FTO conductive glass is treated with oxygen plasma for 10 minutes to enhance the bonding force and adhesion on the surface of the substrate material;

[0045] Step 2. Dissolve 1.3mmol of lead iodide and 0.85mmol of formamidine iodide in a mixed solution of 1ml of dimethylsulfoxide (DMSO) and N,N-dimethylformamide (DMF), mix and stir After uniformity, place it on a heating platform to heat and dissolve at a temperature of 70° C., and then filter to prepare a solution A, wherein the volume percentage of DMF in the mixed solution is 80%, and the volume percentage of DMSO is 20%;

[0046] Step 3. Dissolve 0.15 mmol of met...

Embodiment 2

[0051] A method for preparing a flexible perovskite solar cell, comprising the following steps:

[0052] Step 1. Select 1.5cm×1.5cm PEN-ITO flexible conductive substrate (PEN is polyethylene naphthalate, ITO is tin-doped indium oxide), clean the surface with a small flow of nitrogen, and then Use oxygen plasma treatment for 2 minutes to enhance the bonding force and adhesion on the surface of the substrate material;

[0053] Step 2. Preparation of SnO 2 Electron transport layer: Dissolve nano-tin dioxide hydrosol with a volume ratio of 15% in distilled water and dilute to a solution with a volume percentage of 3.75%, and deposit it on the PEN-ITO flexible conductive layer obtained by step 1 by spin coating. On the material, sintering at a temperature of 90°C for 60 minutes, the dense SnO 2 Electron transport layer;

[0054] Step 3. Preparation of perovskite light absorbing layer:

[0055] 3.1. Dissolve 1.3mmol of lead iodide and 0.85mmol of formamidine iodide in 1ml of a m...

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Abstract

The invention provides a method for preparing a flexible perovskite solar cell at a low temperature, and belongs to the technical field of solar cells. The method re-adjusts a preparation process without introducing additional additives, and comprises the steps of preparing a precursor solution by mixing excess lead iodide and formamidine iodide; during the spin-coating film-forming process of the precursor solution, adding methyl bromide in a spinning drop manner, and then performing low-temperature annealing to prepare a perovskite light absorbing layer. The method solves the problem that in the existing formamidine lead iodide preparation system,the perovskite solar cell has over-high annealing temperature and cannot be applied to a flexible substrate, or has over-low annealing temperature so as to cause low battery efficiency. The preparation method is friendly to environment, simple, and low in cost, and contributes to the high-efficiency preparation of flexible perovskite solar cells and the industrialization of perovskite solar cells.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a method for preparing flexible perovskite solar cells at low temperature. Background technique [0002] The stable supply of energy resources is the focus of a country's attention and the core content of national security. Therefore, how to solve the sustainable supply of energy resources is an important issue related to the national economy and people's livelihood. Traditional fossil energy is a non-renewable resource with limited reserves and high development costs. At the same time, the use of traditional fossil energy has also caused serious pollution to the environment in which people live. Solar energy has attracted the attention of researchers because of its green, non-polluting, abundant reserves, and small geographical restrictions. It is known as the most promising new energy source in the future, and provides a way for mankind to solve the energy crisis. Nowaday...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K71/40H10K77/111H10K30/451Y02E10/549
Inventor 刘明侦李建阳李发明邓文斌
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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