TWI624075B - Structure and method of flexible polymer solar cell capable of improving photoelectric conversion efficiency - Google Patents

Abstract

The invention provides a structure and a method of a soft polymer solar cell capable of improving photoelectric conversion efficiency, and mainly makes the volume ratio of the (PEDOT: PSS) and the (MoO ₃ ) to 1: 3; the (P3HT), The weight ratio of (PCPDTBT) and (PC61BM) is 1: 0.04: 1; by this invention, molybdenum trioxide is mixed in a 1: 3 volume ratio as a hole transport layer, and its PCE is increased from 1.97% to 3.11%, which is improved. 58%, JSC of 8.57mA / cm increased to 9.61mA / cm ^{2 2,} improved 12% fill factor increased from 0.44 to 0.61, with the addition of the active layer can foster PCPDTBT absorbs infrared light, the open-circuit voltage and therefore significantly The improvement also improves the overall photoelectric conversion efficiency.

Description

Structure and method of soft polymer solar cell capable of improving photoelectric conversion efficiency

The present invention relates to a structure and method of a soft polymer solar cell capable of improving photoelectric conversion efficiency, and in particular to a kind of polymer polymer solar cell with high carrier mobility and relatively high chemical and physical stability. Structure of photoelectric conversion efficiency.

According to the first generation of traditional solar cells, silicon crystal inorganic solar cells have the disadvantage that the coefficient of light absorption of silicon itself is relatively low, which results in the battery being slightly thicker and more materials. The process of preparing silicon requires smelting and consumes a lot of energy. Processing in a vacuum makes it expensive to manufacture. Therefore, there are doubts about high energy consumption and high pollution in the manufacturing process of inorganic solar cells. Compared with the above-mentioned inorganic solar cells, which are expensive and difficult to popularize, organic solar cells have considerable advantages to replace inorganic solar cells. The development potential of polymer organic solar cells is amazing, especially in terms of low production costs and flexibility. Under the advantages of light weight, light weight, and simple process, I believe that it can be used to improve human life in the future. At present, the photoelectric conversion efficiency value of polymer organic solar cells is still not comparable to that of inorganic solar cells. However, after the efforts of many scholars, we can find that the optical conversion efficiency of polymer organic solar cells is slowly improving. Methods include: synthesizing low energy gap materials to increase light absorption, using tandem cells, different process conditions, etc. When the material enters the nanometer scale, the characteristics of the material will be different according to its size. Its optical, electrical, magnetic, thermal and mechanical properties are more obvious than the bulk phase. Not the same, inorganic nanomaterials have higher carrier mobility and can improve light absorption and have better chemical and physical stability. Using inorganic nanomaterials can retain the original element characteristics and also possess inorganic nanomaterials. The characteristics of rice materials, so the application of inorganic nano materials in polymer organic solar cells is also a major trend.

Therefore, in view of the problems of the above-mentioned inorganic solar cells, how to develop a more The ideal and practical innovative structure, which is actually used by consumers, is also the goal and direction that relevant industry players must strive to develop breakthroughs. In view of this, the creator has many years of experience in manufacturing development and design of related products. In view of the above-mentioned goals, after detailed design and careful evaluation, he finally has a practical invention.

That is, the main purpose of the present invention is to provide a structure and a method of a soft polymer solar cell capable of improving photoelectric conversion efficiency; the problems to be solved are aimed at the conventional inorganic solar cell manufacturing process that requires smelting, Consuming a lot of energy, it also needs to be processed in a vacuum to improve the manufacturing cost of the problem. The technical characteristics of the problem are mainly including: an anode layer (ITO PET), which is An ITO soft plastic glass material; an electric hole transmission layer (PEDOT: PSS: MoO ₃ ) is arranged on the end face of the anode layer, and the electric hole transmission layer contains a plurality of poly (3,4-two Oxyethylene thiophene) -polystyrene sulfonic acid (PEDOT: PSS) and a plurality of molybdenum trioxide (MoO ₃ ); wherein the plurality of poly (3,4-dioxyethylene thiophene) -polystyrene sulfonic acid ( The volume ratio of PEDOT: PSS) and the plurality of molybdenum trioxide (MoO ₃ ) is 1: 3; an active layer (P3HT: PCPDTBT: PC61BM) is disposed on the upper end surface of the hole transmission layer, and the active layer Poly (3-hexylthiophene), P3HT (p-type material) polymer A semiconductor, a plurality of low energy band gap polymers (PCPDTBT) and a plurality of phenyl-C61-butyric acid methylester (PC61BM (n-type material)) are mixed; wherein the plurality of polyhexylthiophenes ( P3HT), multiple low-energy band gap polymers (PCPDTBT), and multiple phenyl-C61 methyl butyrate (PC61BM) with a weight ratio of 1: 0.04: 1; a cathode layer (Ca / Al), which is overlaid On the upper end surface of the active layer, the cathode layer is composed of a calcareous layer (Ca) and an aluminum layer (Al); by virtue of this innovative and unique design, the present invention makes molybdenum trioxide in a volume ratio of 1: 3. of mixed hole transport layer as its PCE increased from 1.97 to 3.11%, improved 58%, JSC increased from 8.57mA / cm ² to 9.61mA / cm ^2, to enhance the 12% fill factor increased from .44 to .61, Adding PCPDTBT with the active layer can increase the absorption of infrared light, so the open-circuit voltage is significantly increased, which also improves the overall photoelectric conversion efficiency.

〔this invention〕

10‧‧‧Anode layer

20‧‧‧ Hole Transmission Layer

21‧‧‧Poly (3,4-dioxyethylenethiophene) -polystyrenesulfonic acid (PEDOT: PSS)

22‧‧‧Molybdenum trioxide

30‧‧‧Active Level

31‧‧‧ poly (3-hexylthiophene), P3HT (p-type material) polymer semiconductor

32‧‧‧ Low Energy Band Gap Polymer (PCPDTBT)

33‧‧‧phenyl-C61-butyric acid methylester (PC61BM (n-type material))

40‧‧‧ cathode layer

41‧‧‧ calcareous layer

42‧‧‧ aluminum layer

FIG. 1: is a sectional view of the present invention.

FIG. 2 is a visible view of ultraviolet light in this embodiment.

FIG. 3 is a PL fluorescence spectrum chart of this embodiment.

Figure 4: J-V curve diagram of this embodiment.

The invention provides a structure of a flexible polymer solar cell capable of improving photoelectric conversion efficiency, including: an anode layer (ITO PET) (10), the anode layer (10) is made of an ITO soft plastic glass material; The hole transport layer (PEDOT: PSS: MoO ₃ ) (20) is provided on the end face of the anode layer (10). The hole transport layer (20) contains a plurality of poly (3,4-dioxyethylene) Thiophene) -polystyrenesulfonic acid (PEDOT: PSS) (21) and plural molybdenum trioxide (MoO ₃ ) (22); wherein the plural poly (3,4-dioxyethylenethiophene) -polybenzene The volume ratio of ethylene sulfonic acid (PEDOT: PSS) (21) and the plurality of molybdenum trioxide (MoO ₃ ) (22) is 1: 3; an active layer (P3HT: PCPDTBT: PC61BM) (30), which is superposed On the end face above the hole transport layer (20), the active layer (30) contains a plurality of poly (3-hexylthiophene), P3HT (p-type material)) (31) polymer semiconductor, PCPDTBT (32) and plural phenyl-C61-butyric acid methylester (PC61BM (n-type material)) (33) are mixed; wherein the plural poly 3 -Hexylthiophene (P3HT) (31), plural low energy band gap polymers (PCPDT The weight ratio of BT) (32) and plural phenyl-C61 methyl butyrate (PC61BM) (33) is 1: 0.04: 1; a cathode layer (Ca / Al) (40), and the cathode layer (40) is Covered on the end surface of the active layer (30), the cathode layer (40) comprises a calcareous layer (Ca) (41) and an aluminum layer (Al) (42).

The invention also provides a method for a soft polymer solar cell capable of improving photoelectric conversion efficiency, comprising: an anode layer (ITO PET) (10), the anode layer (10) is made of an ITO soft plastic glass material, After etching, it is used for cleaning and put into the ultraviolet light surface treatment for 10 minutes. A hole transmission layer (PEDOT: PSS: MoO ₃ ) (20) is arranged on the end surface above the anode layer (10). The hole The transmission layer (20) is a mixture of a plurality of poly (3,4-dioxyethylene thiophene) -polystyrene sulfonic acid (PEDOT: PSS) (21) and a plurality of molybdenum trioxide (MoO ₃ ) (22). Mixed liquid; the covering method described above is performed by spin-coating the mixed liquid with different volume ratios of the poly (3,4-dioxyethylenethiophene) -polystyrenesulfonic acid ( PEDOT: PSS) (21) and the plurality of molybdenum trioxide (MoO ₃ ) (22) are a 1: 3 mixed solution on the surface of the anode layer (10). After coating, the anode layer (10 ) And the hole transmission layer (20) are baked for 10 minutes, so that the hole transmission layer (20) is solidified; an active layer (P3HT: PCPDTBT: PC61BM) (30) is placed on the hole transmission Layer (20) above the end face, which The active layer (30) contains a plurality of poly (3-hexylthiophene), P3HT (p-type material)) (31) a polymer semiconductor, a plurality of low energy band gap polymers (PCPDTBT) (32), and a plurality of Phenyl-C61-butyric acid methylester (PC61BM (n-type material)) (33) is mixed to form a mixed liquid; the covering method described above is performed by rotating the above mixed liquid at two speeds : (500 rpm, 60 seconds; 1600 rpm, 1 second) spin-coating the complex poly 3-hexylthiophene (P3HT) (31), complex low energy band gap polymer (PCPDTBT) (32), and complex benzene at different weight ratios The methyl-C61 methyl butyrate (PC61BM) (33) is a mixture of 1: 0.04: 1 on the surface of the hole transport layer (20), and after the solvent annealing for 10 minutes, the anode layer (10) and the coating The combined hole transport layer (20) and the active layer (30) are placed in a heating device and baked at 120 ° C for 30 minutes, so that the active layer is cured; a cathode layer (Ca / Al) (40) The cathode layer (40) is arranged on the end surface above the active layer (30). The cathode layer (40) includes a calcareous layer (Ca) (41) and an aluminum layer (Al) (42). Structure, said covering method is the calcareous layer (Ca) (41) and Aluminum layer (Al) (42) of the heat deposited in the active layer (30) surface, i.e., by the completion of device fabrication.

Please refer to FIG. 2, which is a visible view of ultraviolet light generated from experimental data of this creative example. The maximum absorption of the present invention is 0.98, and the absorption wavelength of the active layer is about 450 to 650 nm. The core-shell structure can be formed by mixing molybdenum trioxide as the hole transport layer, which can form better film formation. Adding PCPDTBT with the active layer can increase the absorption of infrared light and increase the absorbance. Absorbing more light can make More electron hole pairs are generated in the active layer, which increases the photocurrent. Please refer to FIG. 3, which is a PL fluorescence spectrum diagram generated from experimental data of an embodiment of the present invention. Molybdenum trioxide mixed as a hole transport layer can form a core-shell structure to make film formation better. Adding PCPDTBT with the active layer can increase the absorption of infrared light and produce better radiation light intensity; see section 4 As shown in the figure, it is a JV curve generated from the experimental data of the embodiment of the present invention. It can be found that when the molybdenum trioxide is mixed in a 1: 3 volume ratio as the hole transport layer, the PCE is increased from 1.97% to 3.11%. of 58%, JSC of 8.57mA / cm ² mentioned To 9.61mA / cm ^2, to enhance the 12% fill factor increased from 0.44 to 0.61, with the addition of the active layer can foster PCPDTBT absorbs infrared light, the open-circuit voltage and therefore significantly improved, but also the greater overall improvement of photoelectric Conversion efficiency.

With this, the present invention uses molybdenum trioxide in a 1: 3 volume ratio as the hole transport layer, and its PCE is increased from 1.97% to 3.11%, an increase of 58%, and JSC is increased from 8.57mA / cm ² to 9.61mA / cm ² , which has increased by 12%, the fill factor has been increased from 0.44 to 0.61, and the addition of PCPDTBT with the active layer can enhance the absorption of infrared light, so the open-circuit voltage has been significantly improved, and the overall photoelectric conversion efficiency has been greatly improved.

Summarizing the above descriptions, the design of the above structure of the present invention can effectively overcome the shortcomings faced by the habitual invention, and further has the above-mentioned many advantages and practical values. Therefore, the present invention is an excellent creative invention, and No identical or similar product creation or public use has been seen in the technical field, so the present invention has already met the requirements of the invention patent for "newness" and "progressiveness", and an application has been made in accordance with the law.

Claims (2)

A structure of a flexible polymer solar cell capable of improving photoelectric conversion efficiency, including: an anode layer (ITO PET), which is made of an ITO soft plastic glass material; an hole transport layer (PEDOT: PSS: MoO) ₃ ), which is arranged on the upper end surface of the anode layer, and the hole transport layer contains a plurality of poly (3,4-dioxyethylene thiophene) -polystyrene sulfonic acid (PEDOT: PSS) and a plurality of trioxide molybdenum (MoO ₃₎ are mixed; wherein the plurality of poly (3,4-dioxyethylene thiophene) - polystyrene sulfonate (PEDOT: PSS) and the plurality of molybdenum trioxide (MoO ₃₎ the volume ratio of 1 : 3; an active layer (P3HT: PCPDTBT: PC61BM), which is disposed on the upper end surface of the hole transport layer, and the active layer contains a plurality of poly (3-hexylthiophene), P3HT (p Type material)) polymer semiconductor, multiple low-energy band gap polymers (PCPDTBT), and multiple phenyl-C61-butyric acid methylester (PC61BM (n-type material)) are mixed; The weight ratio of poly 3-hexylthiophene (P3HT), plural low-energy band gap polymers (PCPDTBT), and plural phenyl-C61 methyl butyrate (PC61BM) is 1: 0.04: 1; one negative Layer (Ca / Al), overlying the cathode layer system is disposed on the end face of the active layer, the cathode layer system comprises a layer of calcium (Ca) layer and an aluminum (Al) are formed. A method for a soft polymer solar cell capable of improving photoelectric conversion efficiency, comprising: an anode layer (ITO PET), the anode layer is made of an ITO soft plastic glass material, cleaned after etching, and put in the ultraviolet light Light surface treatment for 10 minutes; a hole transport layer (PEDOT: PSS: MoO ₃ ) is placed on the end face of the anode layer, and the hole transport layer contains a plurality of poly (3,4-dioxyethylenethiophenes) ) -Polystyrene sulfonic acid (PEDOT: PSS) and a plurality of molybdenum trioxide (MoO ₃ ) are mixed to form a mixed liquid; the covering method is performed by spin coating the mixed liquid at a speed of 5000 rpm and a speed of 50 seconds. A mixture of the poly (3,4-dioxyethylenethiophene) -polystyrenesulfonic acid (PEDOT: PSS) and the molybdenum trioxide (MoO ₃ ) in different volume ratios is 1: 3 mixed in the anode layer. On the surface, the anode layer and the hole transport layer were baked at 120 ° C for 10 minutes after the coating was completed, so that the hole transport layer was cured; an active layer (P3HT: PCPDTBT: PC61BM) was placed on On the upper end surface of the hole transport layer, the active layer system contains a plurality of poly (3-hexylthiophene), P3HT (p-type Material)) polymer semiconductor, multiple low energy band gap polymer (PCPDTBT) and multiple phenyl-C61-butyric acid methylester (PC61BM (n-type material)) mixed into a mixed solution; said The covering method is to spin-coat the mixed solution at different speeds (500 rpm, 60 seconds; 1600 rpm, 1 second) at different speeds (500 rpm, 60 seconds; 1600 rpm, 1 second). The gap polymer (PCPDTBT) and plural phenyl-C61 methyl butyrate (PC61BM) are mixed at a ratio of 1: 0.04: 1 on the surface of the hole transport layer, and after the solvent is annealed for 10 minutes, the anode layer and the coating The combined hole transport layer and the active layer are placed in a heating device and baked at 120 ° C for 30 minutes, so that the active layer is cured. A cathode layer (Ca / Al) is disposed on the cathode layer. On the upper end surface of the active layer, the cathode layer is composed of a calcareous layer (Ca) and an aluminum layer (Al), and the overlay method is to form the calcareous layer (Ca) and the aluminum layer ( Al) is thermally vapor-deposited on the surface of the active layer to complete the component maker.