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Non-lead perovskite photoelectric functional material, solar cell and preparation method and application of non-lead perovskite photoelectric functional material

A technology for optoelectronic functional materials and solar cells, which is applied in the fields of luminescent materials, photovoltaic power generation, amino compound preparation, etc., can solve problems such as environmental and human and animal health threats, environmental pollution, and solar cell photoelectric conversion efficiency attenuation, etc. Effects of protection, good solubility, excellent humidity stability

Active Publication Date: 2019-06-14
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] First, the perovskite material CH 3 NH 3 wxya 3 (X is generally Cl - 、Br - , I - etc.), the carcinogenic heavy metal lead, once decomposed, will seep into the soil and pose a great threat to the environment and human and animal health;
[0005] Second, the metal organolead halide CH 3 NH 3 wxya 3 Sensitive to humidity, which will decompose the perovskite material and cause the photoelectric conversion efficiency of the solar cell to decline sharply, which will seriously affect the service life and commercial application of the solar cell
[0006] Third, CH 3 NH 3 wxya 3 Toxic solvents such as DMF and DMSO are usually used, which have certain pollution to the environment

Method used

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  • Non-lead perovskite photoelectric functional material, solar cell and preparation method and application of non-lead perovskite photoelectric functional material
  • Non-lead perovskite photoelectric functional material, solar cell and preparation method and application of non-lead perovskite photoelectric functional material
  • Non-lead perovskite photoelectric functional material, solar cell and preparation method and application of non-lead perovskite photoelectric functional material

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Embodiment approach

[0040] The present invention provides a non-lead perovskite photoelectric functional material whose chemical formula is ABX 4 .

[0041] where A is C 6 H 5 NH 3 + , C 6 H 5 CH 2 NH 3 + , C 6 H 5 CH 2 CH 2 NH 3 + At least one of; B is a trivalent metal ion; X is a halogen ion. Trivalent metal ions can be selected from Bi 3+ , Sb 3+ at least one of them. X can be selected from F － , Cl － , Br － , I － at least one of them.

[0042] Preferred C in the present invention 6 H 5 NH 3 BiX 4 is a one-dimensional perovskite composed of one-dimensional BiX 6 Octahedral co-edge chain and hydrophobic C 6 H 5 NH 3 + composition, has excellent humidity stability, and its XRD pattern is as follows figure 2 shown.

[0043] An ABX of the present invention 4 The preparation method of the light absorption layer film comprises the following steps:

[0044] 1) Preparation of precursor solution: Weigh equimolar amounts of halogen source and hydrophobic phenyl catio...

Embodiment 1

[0049] Embodiment 1, the preparation of solar cell:

[0050] (1) Pretreatment of FTO transparent conductive glass: The etched FTO transparent conductive glass was ultrasonically cleaned with acetone, ethanol, and deionized water for 15 minutes, dried with nitrogen, and then treated with an ultraviolet ozone cleaner for 30 minutes to remove residual organic matter ;

[0051] (2) Preparation of titanium oxide dense layer: A titanium oxide dense layer was prepared on the pretreated FTO transparent conductive glass by spin coating (the process parameters were 2500r.p.m, 20s), and annealed at 500 °C (the heating rate was 5℃ / min, holding time is 30min);

[0052] (3) Preparation of titanium oxide mesoporous layer: spin-coat the titanium oxide mesoporous slurry on the titanium oxide dense layer (the process parameters are 2500r.p.m, 60s), and anneal at 500 °C (the heating rate is 5 °C / min, the holding time is 30min);

[0053] (4) Preparation of methylamine halide copper-based pero...

Embodiment 2

[0056] Embodiment 2, the preparation of solar cell:

[0057] (1) FTO transparent conductive glass pretreatment: same as Example 1;

[0058] (2) Preparation of titanium oxide dense layer: the same as in Example 1;

[0059] (3) Preparation of titanium oxide mesoporous layer: the same as in Example 1;

[0060] (4) Preparation of methylamine halide copper-based perovskite light-absorbing layer: C with a molar concentration of 0.5 M was placed on the titanium oxide mesoporous layer. 6 H 5 NH 3 BiI 4 The precursor solution (anhydrous ethanol as the solvent) was used to prepare the non-lead perovskite light-absorbing layer by spin coating-vacuum pumping method (the process parameters were 4000r.p.m, 3s, and the air pressure in the pumping chamber: 1000Pa), and was heated at 75°C on a hot stage. After heating for 30min, red C is formed after heating 6 H 5 NH 3 BiI 4 perovskite thin films;

[0061] (5) Preparation of hole transport layer: An inorganic hole transport layer CuP...

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Abstract

The invention discloses a non-lead perovskite photoelectric functional material, a solar cell and a preparation method and application of the non-lead perovskite photoelectric functional material. Thechemical formula of the non-lead perovskite photoelectric functional material is ABX4, wherein A is a hydrophobic phenyl cation, B is a trivalent metal ion, and X is a halide ion. The prepared non-lead perovskite photoelectric functional material has a quasi-three-dimensional crystal structure and has humidity stability which lasts for one year or above; according to the non-lead perovskite photoelectric functional material C6H5NH3BiI4, the toxic lead element is replaced with the nontoxic bismuth element, CH3NH3 is replaced with C6H5NH3 with hydrophobicity, and the non-lead perovskite photoelectric functional material has the characteristics of nontoxicity, environment protection and high stability. In addition, the C6H5NH3BiI4 has good solubility in ethyl alcohol, and environment-friendly and low-toxicity ethyl alcohol is used as a solvent, so that natural environment protection is facilitated.

Description

technical field [0001] The invention belongs to the technical field of photoelectric semiconductor materials, and in particular relates to a non-lead perovskite photoelectric functional material, a solar cell and a preparation method and application thereof. Background technique [0002] in CH 3 NH 3 wxya 3 (X=I, Br, Cl) is the light-absorbing layer of perovskite solar cells because of its high photoelectric conversion efficiency, large-scale manufacturing by low-cost solution method, simple and low-cost preparation process and equipment, etc. people's widespread attention. Since it first appeared with a photoelectric conversion efficiency of 3.8% in 2009, its efficiency has continued to rise at an unprecedented rate in just nine years, and the highest certified efficiency reached 23.7% as of November 2018. Perovskite also shines in fields such as LEDs and photodetectors. [0003] However, there are still three deficiencies in perovskite photoelectric materials: [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C211/45C07C211/27C07C209/00C09K11/06H01L51/42H01L51/46
CPCY02E10/549
Inventor 杨冠军李小磊丁斌高黎黎楚倩倩
Owner XI AN JIAOTONG UNIV
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