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Efficient ternary organic solar cell prepared based on step-by-step deposition method

A technology of organic solar cells and deposition method, applied in the field of solar cells, can solve problems such as inhomogeneity of thin films, time-consuming, and complicated process operations, and achieve the effects of charge recombination inhibition, crystallinity improvement, and energy level structure optimization

Pending Publication Date: 2020-11-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method takes a lot of time to adjust the scraping parameters, the process operation is complicated, and the film is not uniform

Method used

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  • Efficient ternary organic solar cell prepared based on step-by-step deposition method
  • Efficient ternary organic solar cell prepared based on step-by-step deposition method
  • Efficient ternary organic solar cell prepared based on step-by-step deposition method

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Experimental program
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Effect test

Embodiment 1

[0018] The transparent conductive glass with strip-shaped ITO (anode) etched on the surface is cleaned with cleaning agent, deionized water, acetone and isopropanol by ultrasonic oscillation, dried, and then treated with ultraviolet ozone for 15 minutes; Spin-coat a layer of PEDOT:PSS with a thickness of 20 nm on the surface at a rotation speed of 4500 rpm, and then anneal at 170° C. for 20 minutes, and then transfer the sheet to a glove box. Preparation of BHJ-type organic solar cells: PM6:BO-4Cl (weight ratio 1:1.2) was added with 1,8-diiodooctane (DIO) with a volume ratio of 0.25% and a total concentration of 17.6mg / mL The mixed solution in chloroform was spin-coated at a speed of 3500 rpm for 30 seconds to obtain an active layer with a thickness of 115 nm. The active layer is annealed at 100° C. for 10 minutes. Then on the active layer, a 5 nm thick PFN-Br modification layer was spin-coated with 0.5 mg / mL PFN-Br methanol solution. Finally, a layer of Ag electrode (cathod...

Embodiment 2

[0023] The transparent conductive glass with strip-shaped ITO (anode) etched on the surface is cleaned with cleaning agent, deionized water, acetone and isopropanol by ultrasonic oscillation, dried, and then treated with ultraviolet ozone for 15 minutes; Spin-coat a layer of PEDOT:PSS with a thickness of 20 nm on the surface at a rotation speed of 4500 rpm, and then anneal at 170° C. for 20 minutes, and then transfer the sheet to a glove box. Preparation of BHJ type organic solar cells: PM6:BO-4Cl:BTP-S2 (wherein the donor , the total weight ratio of the acceptor is 1:1.2, and the mass ratio of BTP-S2 in the acceptor is 15%) in chloroform, spin coating for 30 seconds at a speed of 3500 rpm to obtain an active layer with a thickness of 115 nm. The active layer is annealed at 100° C. for 10 minutes. Then on the active layer, a 5 nm thick PFN-Br modification layer was spin-coated with 0.5 mg / mL PFN-Br methanol solution. Finally, a Ag electrode (cathode) with a thickness of 100n...

Embodiment 3

[0026] The transparent conductive glass with strip-shaped ITO (anode) etched on the surface is cleaned with cleaning agent, deionized water, acetone and isopropanol by ultrasonic oscillation, dried, and then treated with ultraviolet ozone for 15 minutes; Spin-coat a layer of PEDOT:PSS with a thickness of 20 nm on the surface at a rotation speed of 4500 rpm, and then anneal at 170° C. for 20 minutes, and then transfer the sheet to a glove box. Preparation of BHJ type organic solar cells: PM6:BO-4Cl:BTP-S2 (where donor, acceptor The total weight ratio is 1:1.2, and the mass ratio of BTP-S2 in the acceptor is 25%) in chloroform, and the mixed solution is spin-coated at a speed of 3500 rpm for 30 seconds to obtain an active layer with a thickness of 115 nm. The active layer is annealed at 100° C. for 10 minutes. Then on the active layer, a 5 nm thick PFN-Br modification layer was spin-coated with 0.5 mg / mL PFN-Br methanol solution. Finally, a layer of Ag electrode (cathode) with...

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Abstract

The invention discloses an efficient ternary organic solar cell prepared based on a step-by-step deposition method, and the solar cell comprises a substrate, an anode, an anode modification layer, anactive layer, a cathode modification layer and a cathode from bottom to top, wherein the active layer is a wide-band-gap polymer donor (PM6) film and a non-fullerene receptor compound (a mixture of BO-4Cl and BTP-S2) film which are sequentially deposited on the anode modification layer by adopting a spin-coating process. By utilizing poor compatibility between BTP-S2 and PM6 and large shearing force during film formation of a spin-coating process, the active layer can have an ideal PiN morphology structure, namely, a donor rich phase is formed at the interface of the anode modification layer,a receptor rich phase is formed at the interface of the cathode modification layer, and a bulk heterojunction thick film in which a donor and a receptor are uniformly mixed is formed in the middle. Therefore, according to the ternary organic solar cell obtained by the invention, efficient generation and efficient collection of photocurrent are realized at the same time, the PCE is not only higherthan that of a corresponding bulk heterojunction ternary cell, but also the highest efficiency (18.50%) of the organic solar cell so far is obtained.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a high-efficiency ternary organic solar cell prepared based on a step-by-step deposition method. Background technique [0002] In recent years, organic solar cells have benefited from the emergence of Y-series electron acceptors, and have achieved rapid improvements in energy conversion efficiency. At present, the energy conversion efficiency of single-junction cells has exceeded 18% (Science Bulletin 2020, 65, 272). [0003] In addition to the development of new materials, the morphology control of the active layer is also a key factor in determining device performance. The purpose of morphology control is to enable photocurrent to be efficiently generated in the active layer and collected by the electrodes. At present, people generally adopt the spin-coating process to obtain the morphology of the active layer of the bulk heterojunction (BHJ), that is, the electron donor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/12H10K71/40H10K30/81H10K30/00Y02E10/549
Inventor 陈红征占玲玲李水兴施敏敏李寒莹
Owner ZHEJIANG UNIV
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