Organic solar cell with exciton blocking and solar photosensitizing integrated hole transport layer and preparation method thereof

A hole transport layer and solar cell technology, applied in the field of green solar energy sources, can solve the problems of mismatch of injection and transmission rates, low short-circuit current, and many unclear mechanisms, so as to reduce the dark current component and electron leakage current, Effects of preventing exciton quenching and balancing transport properties

Inactive Publication Date: 2018-12-07
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 2. The donor / acceptor exciton separation in traditional planar heterojunction cells is not sufficient, resulting in low short-circuit current;
[0006] 3. The morphology and structure of the bulk heterojunction are complex, it is difficult to control accurately, and there are many unknown mechanisms;
[0007] 4. The mismatch between the injection and transport rates of holes and electrons leads to the limitation of the final photogenerated current
[0008] The traditional hole injection or transport material in OPV is poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which has an excellent smooth conductive substrate, suppresses leakage current and obtains a higher open circuit voltage, but at the same time It is also a strong exciton quencher, which affects the promotion of OPV in real-world applications

Method used

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  • Organic solar cell with exciton blocking and solar photosensitizing integrated hole transport layer and preparation method thereof
  • Organic solar cell with exciton blocking and solar photosensitizing integrated hole transport layer and preparation method thereof
  • Organic solar cell with exciton blocking and solar photosensitizing integrated hole transport layer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0043] In this example, see figure 1 , an organic solar cell with an integrated hole transport layer for exciton blocking and sunlight sensitization, which consists of a substrate layer 1, a transparent conductive anode layer 2, a hole injection layer 3, and an exciton blocking layer from bottom to top 4. The donor layer 5, the acceptor layer 6, the electron transport layer 7 and the electrode cathode layer 8 are composed of a total of 8 functional layers. The donor layer 5 is made of organic solar cell materials with narrow band and strong absorption. The acceptor layer 6 is made of fullerene, and the material of the exciton blocking layer 4 is a wide bandgap hole transport material with ultraviolet absorption and almost no absorption of visible light, and the energy level of the exciton blocking layer 4 is the same as that of the donor layer 5 match.

[0044] In this embodiment, the ITO substrate composed of the substrate layer 1 and the transparent conductive anode layer 2...

Embodiment 2

[0048] This embodiment is basically the same as Embodiment 1, especially in that:

[0049] In this example, see figure 1 , select a transparent ITO glass substrate etched into a certain template as the anode, and the thickness of the ITO glass substrate is 150 nm. Use lotion, acetone, deionized water, and isopropanol to clean ultrasonically for 20 minutes, blow dry with nitrogen, and UV / O 3 Process for 15 minutes and set aside. The hole injection layer MoO was deposited on the ITO glass substrate by vacuum evaporation 3 , the thickness is 10nm, then deposit the exciton blocking layer BSB-Cz, the thickness is controlled at 8-20nm, then deposit the donor SubPc, the thickness is 7-20nm and the acceptor layer C 60 , with a thickness of 30-50nm, and then deposit Bphen, an electron transport layer material, with a thickness of 5-10nm, and then replace the mask plate to vapor-deposit the cathode metal, and the vapor-deposited metal Al is the cathode, with a thickness of 100nm.

...

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Abstract

The invention discloses an organic solar cell with an integrated hole transport layer for exciton blocking and sunlight sensitization and a preparation method thereof. The device includes a substrate, a transparent electrode, a hole injection layer, an exciton blocking layer, Donor layer, acceptor layer, electron transport layer and electrode cathode. The device is characterized by an exciton blocking layer. Through material matching, this exciton blocking layer can not only effectively block electrons at the anode end, reduce the dark current component and electron leakage current of photovoltaic cells; The ultraviolet light emits pure blue or sky blue light, enhancing the number of incident photons to the active layer of the subsequent organic solar cell. The photogenerated current is increased to improve the power conversion efficiency of photovoltaic cells. The device disclosed by the invention simultaneously realizes the dual functions of exciton blocking and solar light enhancement in a simple method without other additional optical designs and complex processes. The preparation process is simple, the equipment requirement is low, and it is suitable for mass production.

Description

technical field [0001] The invention relates to an organic optoelectronic device and a preparation method thereof, in particular to an organic solar cell (OPV) and a preparation method thereof, which are applied in the technical field of green solar energy. Background technique [0002] Organic optoelectronic technology is one of the high-tech technologies that have developed rapidly in the world's academic circles in the past 10 years. With the rapid development of film-forming technology and the diversity of design of organic materials or organic / inorganic hybrid materials, organic optoelectronic products such as organic electroluminescence devices, organic solar cells (organic photovoltaic cells, OPV), organic field effect transistors, etc. are gradually developing. Mature, and has the advantages of easy large-area preparation, flexibility, and shock resistance. Among them, organic solar cells using clean energy have attracted much attention in the field of energy techno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/44H01L51/42H01L51/48
CPCH10K71/10H10K30/80H10K30/00Y02E10/549
Inventor 郑燕琼张静杨芳魏斌濮文虹
Owner SHANGHAI UNIV
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