Bismuth ferrite material with perovskite-like structure as well as preparation method and application of bismuth ferrite material

A perovskite structure, bismuth ferrite technology, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve problems such as difficult industrial production, low photoelectric conversion rate, and poor performance

CN113371760APending Publication Date: 2021-09-10GUIZHOU UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-09-10

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Abstract

The invention provides a bismuth ferrite material with a perovskite-like structure as well as a preparation method and application thereof, the bismuth ferrite material with the perovskite-like structure has a chemical general formula of Bi (1-x) GdxFe (1-y) MnyO3, and is prepared from bismuth nitrate, gadolinium nitrate, ferric nitrate and manganese acetate as raw materials. The bismuth ferrite material with the perovskite-like structure prepared by the invention is excellent in performance, high in photoelectric conversion rate, low in production cost, stable and reliable in preparation process, easy to realize industrial production and good in application prospect in the field of ferroelectric photovoltaic solar cells, and the photo-generated current is increased while the ferroelectricity is maintained.
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Description

technical field

[0001] The invention belongs to the field of ferroelectric photovoltaic materials. Specifically, the present invention relates to a perovskite-like structure bismuth ferrite material and its preparation method and application. Background technique

[0002] With the energy crisis and environmental deterioration, human demand for sustainable supply of clean energy is increasing day by day. As a renewable energy source, solar energy is considered to be the basis of the future energy structure. Photovoltaic technology is one of the important forms of solar energy utilization, and its basic solar cells can directly convert solar energy into electrical energy through the "photovoltaic effect" (PV). In 1961, Shockley and Queisser proposed the meticulously balanced efficiency limit theory (SQL theory) of single-junction PN junction solar cells, which predicted the best energy band structure and the highest conversion efficiency of single-junction solar cells. At t...

Examples

Embodiment 1

[0057] Embodiment 1 class perovskite structure bismuth ferrite material (Bi 1-x Gd x Fe 1-y mn y o 3 Preparation of x=0.15y=0)

[0058] (1) Precursor preparation: 8.55 mmol of analytically pure bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O), 1.35mmol gadolinium nitrate (Gd(NO 3 ) 3 ·6H 2 O) were dissolved in 5mL ethylene glycol methyl ether (C 3 h 8 o 2 ), obtain the ethylene glycol methyl ether solution (1.71mol / L) of bismuth nitrate and the ethylene glycol methyl ether solution (0.27mol / L) of gadolinium nitrate, and the ethylene glycol methyl ether solution of bismuth nitrate and gadolinium nitrate The ethylene glycol methyl ether solution is mixed to obtain the ethylene glycol methyl ether mixed solution A (0.99mol / L). Then 9 mmol of ferric nitrate was dissolved in 5 mL of ethylene glycol methyl ether to obtain a solution B of ferric nitrate in ethylene glycol methyl ether (1.8 mol / L). Subsequently, the ethylene glycol methyl ether mixture A and the ethylene glycol me...

Embodiment 2

[0060] Embodiment 2 class perovskite structure bismuth ferrite material (Bi 1-x Gd x Fe 1-y mn y o 3 Preparation of x=0.15y=0.04)

[0061] (1) Precursor preparation: 8.55 mmol of analytically pure bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O), 1.35mmol gadolinium nitrate (Gd(NO 3 ) 3 ·6H 2 O) were dissolved in 5mL ethylene glycol methyl ether (C 3 h 8 o 2), obtain the ethylene glycol methyl ether solution (1.71mol / L) of bismuth nitrate and the ethylene glycol methyl ether solution (0.27mol / L) of gadolinium nitrate, and the ethylene glycol methyl ether solution of bismuth nitrate and gadolinium nitrate The ethylene glycol methyl ether solution is mixed to obtain the ethylene glycol methyl ether mixed solution A (0.99mol / L). Then 8.64mmol of ferric nitrate and 0.36mmol of manganese acetate were dissolved in 5mL of ethylene glycol methyl ether to obtain a ethylene glycol methyl ether solution of ferric nitrate (1.728mol / L) and a ethylene glycol methyl ether solution of mang...

Embodiment 3

[0063] Embodiment 3 class perovskite structure bismuth ferrite material (Bi 1-x Gd x Fe 1-y mn y o 3 x=0.15y=0.08) preparation

[0064] (1) Precursor preparation: 8.55 mmol of analytically pure bismuth nitrate (Bi(NO 3 ) 3 ·5H 2 O), 1.35mmol gadolinium nitrate (Gd(NO 3 ) 3 ·6H 2 O) were dissolved in 5mL ethylene glycol methyl ether (C 3 h 8 o 2 ), obtain the ethylene glycol methyl ether solution (1.71mol / L) of bismuth nitrate and the ethylene glycol methyl ether solution (0.27mol / L) of gadolinium nitrate, and the ethylene glycol methyl ether solution of bismuth nitrate and gadolinium nitrate The ethylene glycol methyl ether solution is mixed to obtain the ethylene glycol methyl ether mixed solution A (0.99mol / L). Then 8.25mmol ferric nitrate and 0.7mmol manganese acetate were dissolved in 5mL of ethylene glycol methyl ether respectively to obtain a ethylene glycol methyl ether solution (1.65mol / L) of ferric nitrate and a ethylene glycol methyl ether solution of m...