阅读说明：本技术 一种染料敏化太阳能电池用染料及其制备方法 (Dye for dye-sensitized solar cell and preparation method thereof ) 是由 刘群 于虹 于 2021-08-25 设计创作，主要内容包括：本发明公开了一种染料敏化太阳能电池用染料的制备方法,涉及太阳能电池技术领域。本发明染料敏化太阳能电池用染料是由叶黄素、原花青素、酞箐铜、酞箐锌以及香豆素制备而成,其利用植物染料、酞箐类染料以及有机染料复配而成。利用本发明染料制备的染料敏化太阳能电池具有优良的光电转化率,同时本发明的染料还具有成本低的特点。(The invention discloses a preparation method of a dye for a dye-sensitized solar cell, and relates to the technical field of solar cells. The dye for the dye-sensitized solar cell is prepared from lutein, procyanidine, copper phthalocyanine, zinc phthalocyanine and coumarin, and is prepared by compounding a plant dye, a phthalocyanine dye and an organic dye. The dye-sensitized solar cell prepared by the dye has excellent photoelectric conversion rate, and the dye has the characteristic of low cost.)

1. The dye for the dye-sensitized solar cell is characterized by comprising the following raw materials in percentage by mass:

40-70% of lutein;

10-30% of procyanidine;

1-10% of phthalocyanine copper;

1-10% of phthalocyanine zinc;

1-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

2. The dye for the dye-sensitized solar cell according to claim 1, which is characterized by comprising the following raw materials in percentage by mass:

50-70% of lutein;

10-30% of procyanidine;

3-10% of phthalocyanine copper;

3-10% of phthalocyanine zinc;

3-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

3. The dye for the dye-sensitized solar cell according to claim 2, characterized by comprising the following raw materials in percentage by mass:

50-60% of lutein;

10-30% of procyanidine;

5-10% of phthalocyanine copper;

5-10% of phthalocyanine zinc;

5-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

4. The dye for the dye-sensitized solar cell according to claim 3, characterized by comprising the following raw materials in percentage by mass:

50-60% of lutein;

20-30% of procyanidine

5-10% of phthalocyanine copper;

5-10% of phthalocyanine zinc;

5-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

5. The dye for dye-sensitized solar cell according to any one of claims 1 to 4, characterized in that the lutein is prepared by the following method:

1) pulping marigold, adding an extracting agent, adjusting the pH value of an extraction system to 10-12, extracting, and performing solid-liquid separation to obtain an extract liquid;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) refining the solid extract to obtain the lutein.

6. The dye for dye-sensitized solar cells according to claim 5, wherein the extractant in step 1) is a mixture of tetrahydrofuran and ethanol in a volume ratio of 1: 4.

7. The dye for dye-sensitized solar cells according to claim 5, wherein the refining process in step 3) is to soak the solid extract in tetrahydrofuran for 10-30min, then evaporate the solid extract under reduced pressure, wash the dried solid extract with ethanol for a plurality of times, dissolve the dried solid extract in ethanol solvent of tetrahydrofuran, recrystallize the solid extract at a temperature of 0-5 ℃, filter the solid extract, wash and dry the solid extract to obtain lutein, wherein the ethanol solvent of tetrahydrofuran is prepared by mixing tetrahydrofuran and ethanol in a volume ratio of 1: 1.

8. The dye for dye-sensitized solar cell according to any one of claims 1 to 4, wherein said procyanidin is at least one of blueberry procyanidin, cranberry procyanidin, and medlar procyanidin.

9. The method for preparing the dye for the dye-sensitized solar cell according to any one of claims 1 to 4, wherein the dye for the dye-sensitized solar cell is obtained by adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic wave, evaporating to remove the ethanol, drying, grinding and crushing.

10. The method as claimed in claim 9, wherein the ultrasonic frequency is 500-1000 Hz.

Technical Field

The invention belongs to the technical field of solar cells, and particularly relates to a dye for a dye-sensitized solar cell and a preparation method thereof.

Background

A dye-sensitized solar cell (DSSC) is a new type of inexpensive thin-film solar cell developed based on nanotechnology. It is based on a semiconductor consisting of a photosensitive electrode and an electrolyte, and is an electrochemical system. The dye-sensitized solar cell has low cost, does not need to be processed and manufactured by a precise instrument, has high mechanical strength and can resist the impact of branches or hailstones.

Dye molecules are key components affecting the light capture efficiency and electron injection efficiency of dye-sensitized solar cells. In order to improve the performance of the dye-sensitized solar cell, the dye molecules need to satisfy the following conditions:

(1) the dye molecules should have a high molar extinction coefficient and a broad spectral response range to achieve maximum overlap with the solar spectrum;

(2) the dye molecules should have strong interaction with the semiconductor surface;

(3) the excited state oxidation-reduction potential of the dye molecule should be higher than the conduction band edge of the semiconductor;

(4) the dye molecule aggregation is performed when the oxidation-reduction potential of the ground state of the dye molecule is lower than the oxidation-reduction potential difference of the electric pair, and the dye molecule has a better molecular configuration;

(5) the dye molecule should have sufficient stability.

The dyes currently used in DSSCs are mainly: ruthenium-based polypyridine complexes, porphyrins, phthalocyanines, pure organic dyes, and the like. Among them, phthalocyanine compounds are concerned about due to their simple production process, low cost, little environmental pollution and excellent photoelectric properties, and have become a hot point of research and development.

Disclosure of Invention

Therefore, the invention provides a dye for a dye-sensitized solar cell, which is composed of a plant dye, a phthalocyanine dye and an organic dye, and has the characteristics of low cost and excellent photoelectric performance.

The dye for the dye-sensitized solar cell is composed of the following raw materials in percentage by mass:

40-70% of lutein;

procyanidin 10-30%

1-10% of phthalocyanine copper;

1-10% of phthalocyanine zinc;

1-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

Preferably, the dye for the dye-sensitized solar cell is prepared from the following raw materials in percentage by mass:

50-70% of lutein;

10-30% of procyanidine;

3-10% of phthalocyanine copper;

3-10% of phthalocyanine zinc;

3-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

More preferably, the dye for the dye-sensitized solar cell is prepared from the following raw materials in percentage by mass:

50-60% of lutein;

10-30% of procyanidine;

5-10% of phthalocyanine copper;

5-10% of phthalocyanine zinc;

5-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

Further preferably, the dye for the dye-sensitized solar cell is composed of the following raw materials in percentage by mass:

50-60% of lutein;

20-30% of procyanidine;

5-10% of phthalocyanine copper;

5-10% of phthalocyanine zinc;

5-10% of coumarin;

the sum of the mass of the raw materials is 100 percent.

Wherein in some embodiments, the lutein of the present invention is prepared by the following steps:

1) pulping marigold, adding an extracting agent, adjusting the pH value of an extraction system to 10-12, extracting for multiple times, and performing solid-liquid separation to obtain an extract liquid;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) refining the solid extract to obtain the lutein.

Preferably, the extractant in the step 1) is a mixture of tetrahydrofuran and ethanol with a volume ratio of 1: 4.

Preferably, the refining process in the step 3) is to soak the solid extract in tetrahydrofuran for 10-30min, then to dry by evaporation under reduced pressure, and to wash with ethanol for multiple times, to dissolve the dried solid extract in a tetrahydrofuran ethanol solvent, to recrystallize at a temperature of 0-5 ℃, to filter, wash and dry to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol in a volume ratio of 1: 1.

In some embodiments, the procyanidin is at least one of blueberry procyanidin, cranberry procyanidin, and wolfberry procyanidin.

The invention also provides a preparation method of the dye for the dye-sensitized solar cell, which comprises the steps of adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell.

Preferably, the ultrasonic frequency is 500-1000 Hz.

Compared with the prior art, the invention has the following beneficial effects:

the dye for the dye-sensitized solar cell can obviously improve the photoelectric conversion efficiency of the dye-sensitized solar cell.

Detailed Description

The present invention will be further described with reference to the following specific examples.

Example 1

The preparation method of the dye for the dye-sensitized solar cell comprises the following steps:

s1, weighing the following raw materials in percentage by mass:

55% of lutein; 25% of blueberry procyanidine; 5% of phthalocyanine copper; 5% of phthalocyanine zinc; 10% of coumarin; the preparation method of the lutein comprises the following steps:

1) pulping marigold, adding an extracting agent (a mixed solution of tetrahydrofuran and ethanol with a volume ratio of 1: 4), adjusting the pH value of an extraction system to 11, extracting for multiple times, and performing solid-liquid separation to obtain an extract;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) soaking the solid extract in tetrahydrofuran for 30min, then drying by evaporation under reduced pressure, washing with ethanol for multiple times, dissolving the dried solid extract in tetrahydrofuran ethanol solvent, recrystallizing at 0-5 ℃, filtering, washing and drying to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol according to the volume ratio of 1: 1.

S2, adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic waves, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell, wherein the ultrasonic frequency is 800 Hz.

The photoelectrode of the dye-sensitized solar cell is subjected to dip dyeing by the dye, and the photoelectric conversion efficiency is measured to be 15.13%.

Example 2

The preparation method of the dye for the dye-sensitized solar cell comprises the following steps:

s1, weighing the following raw materials in percentage by mass:

60% of lutein; 20% of cranberry procyanidin; 10% of copper phthalocyanine; 5% of phthalocyanine zinc; 5% of coumarin; the preparation method of the lutein comprises the following steps:

1) pulping marigold, adding an extracting agent (a mixed solution of tetrahydrofuran and ethanol with a volume ratio of 1: 4), adjusting the pH value of an extraction system to 11, extracting for multiple times, and performing solid-liquid separation to obtain an extract;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) soaking the solid extract in tetrahydrofuran for 30min, then drying by evaporation under reduced pressure, washing with ethanol for multiple times, dissolving the dried solid extract in tetrahydrofuran ethanol solvent, recrystallizing at 0-5 ℃, filtering, washing and drying to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol according to the volume ratio of 1: 1.

S2, adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic waves, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell, wherein the ultrasonic frequency is 800 Hz.

The photoelectrode of the dye-sensitized solar cell is subjected to dip dyeing by the dye, and the photoelectric conversion efficiency is measured to be 13.52%.

Example 3

The preparation method of the dye for the dye-sensitized solar cell comprises the following steps:

s1, weighing the following raw materials in percentage by mass:

50% of lutein; 30% of procyanidine of the medlar; 5% of phthalocyanine copper; 5% of phthalocyanine zinc; 10% of coumarin; the preparation method of the lutein comprises the following steps:

1) pulping marigold, adding an extracting agent (a mixed solution of tetrahydrofuran and ethanol with a volume ratio of 1: 4), adjusting the pH value of an extraction system to 11, extracting for multiple times, and performing solid-liquid separation to obtain an extract;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) soaking the solid extract in tetrahydrofuran for 30min, then drying by evaporation under reduced pressure, washing with ethanol for multiple times, dissolving the dried solid extract in tetrahydrofuran ethanol solvent, recrystallizing at 0-5 ℃, filtering, washing and drying to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol according to the volume ratio of 1: 1.

S2, adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic waves, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell, wherein the ultrasonic frequency is 800 Hz.

The photoelectrode of the dye-sensitized solar cell is subjected to dip dyeing by the dye, and the photoelectric conversion efficiency is 14.25 percent.

Comparative example 1

The preparation method of the dye for the dye-sensitized solar cell comprises the following steps:

s1, weighing the following raw materials in percentage by mass:

80% of lutein; 20% of blueberry procyanidine; the preparation method of the lutein comprises the following steps:

1) pulping marigold, adding an extracting agent (a mixed solution of tetrahydrofuran and ethanol with a volume ratio of 1: 4), adjusting the pH value of an extraction system to 11, extracting for multiple times, and performing solid-liquid separation to obtain an extract;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) soaking the solid extract in tetrahydrofuran for 30min, then drying by evaporation under reduced pressure, washing with ethanol for multiple times, dissolving the dried solid extract in tetrahydrofuran ethanol solvent, recrystallizing at 0-5 ℃, filtering, washing and drying to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol according to the volume ratio of 1: 1.

S2, adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic waves, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell, wherein the ultrasonic frequency is 800 Hz.

The photoelectrode of the dye-sensitized solar cell is subjected to dip dyeing by the dye, and the photoelectric conversion efficiency is measured to be 8.30%.

Comparative example 2

The preparation method of the dye for the dye-sensitized solar cell comprises the following steps:

s1, weighing the following raw materials in percentage by mass:

55% of lutein, 25% of blueberry procyanidin and 20% of copper phthalocyanine; the preparation method of the lutein comprises the following steps:

1) pulping marigold, adding an extracting agent (a mixed solution of tetrahydrofuran and ethanol with a volume ratio of 1: 4), adjusting the pH value of an extraction system to 11, extracting for multiple times, and performing solid-liquid separation to obtain an extract;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) soaking the solid extract in tetrahydrofuran for 30min, then drying by evaporation under reduced pressure, washing with ethanol for multiple times, dissolving the dried solid extract in tetrahydrofuran ethanol solvent, recrystallizing at 0-5 ℃, filtering, washing and drying to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol according to the volume ratio of 1: 1.

S2, adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic waves, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell, wherein the ultrasonic frequency is 800 Hz.

The photoelectrode of the dye-sensitized solar cell is subjected to dip dyeing by the dye, and the photoelectric conversion efficiency is measured to be 9.45%.

Comparative example 3

The preparation method of the dye for the dye-sensitized solar cell comprises the following steps:

s1, weighing the following raw materials in percentage by mass:

80% of lutein; 5% of phthalocyanine copper; 5% of phthalocyanine zinc; 10% of coumarin; the preparation method of the lutein comprises the following steps:

1) pulping marigold, adding an extracting agent (a mixed solution of tetrahydrofuran and ethanol with a volume ratio of 1: 4), adjusting the pH value of an extraction system to 11, extracting for multiple times, and performing solid-liquid separation to obtain an extract;

2) distilling the extract under reduced pressure, concentrating, and drying to obtain solid extract;

3) soaking the solid extract in tetrahydrofuran for 30min, then drying by evaporation under reduced pressure, washing with ethanol for multiple times, dissolving the dried solid extract in tetrahydrofuran ethanol solvent, recrystallizing at 0-5 ℃, filtering, washing and drying to obtain lutein, wherein the tetrahydrofuran ethanol solvent is prepared by mixing tetrahydrofuran and ethanol according to the volume ratio of 1: 1.

S2, adding the weighed raw materials into ethanol, uniformly mixing by ultrasonic waves, evaporating to remove the ethanol, drying, grinding and crushing to obtain the dye for the dye-sensitized solar cell, wherein the ultrasonic frequency is 800 Hz.

The photoelectrode of the dye-sensitized solar cell is dip-dyed by the dye, and the photoelectric conversion efficiency is measured to be 8.01%.

It should be noted that the above-mentioned embodiments are merely examples of the present invention, and it is obvious that the present invention is not limited to the above-mentioned embodiments, and other modifications are possible. All modifications directly or indirectly derivable by a person skilled in the art from the present disclosure are to be considered within the scope of the present invention.