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Organic solar cell with vertical phase separation of donor and acceptor and its preparation method

A solar cell and organic technology, applied in semiconductor/solid-state device manufacturing, circuits, electrical components, etc., can solve unrealistic problems, achieve the effects of increasing short-circuit current, ensuring transmission, and improving photoelectric conversion efficiency

Inactive Publication Date: 2017-11-07
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the realization of this structure can only be obtained by laboratory-level micro-nanofabrication methods, which is unrealistic in actual industrial production.

Method used

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  • Organic solar cell with vertical phase separation of donor and acceptor and its preparation method
  • Organic solar cell with vertical phase separation of donor and acceptor and its preparation method
  • Organic solar cell with vertical phase separation of donor and acceptor and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment

[0042] Except for step 3), other steps are the same as the reference device, where step 3) is:

[0043] The material of the electron acceptor is PC70BM, and the material of the electron donor is still PBDTTT-CF. , the concentration of the mixed solution is the same. After the spin coating is finished, place the sample in a glass petri dish to ensure that the solvent o-dichlorobenzene does not evaporate within 40 minutes. Use 0.2mW / cm 2 , UV light with a wavelength of 365nm was irradiated for 40 minutes to initiate photopolymerization.

[0044] Measurements and Results

[0045] The parameters that characterize the performance of solar cells mainly include short-circuit current density, open-circuit voltage, fill factor, and photoelectric conversion efficiency. The operating current per unit light-receiving area of ​​a solar cell under short-circuit conditions is called the short-circuit current density J sc , at this time the battery output voltage is zero; the output voltag...

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PUM

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Abstract

The invention discloses an organic solar cell in which a donor and an acceptor are vertically separated and a preparation method thereof. The organic solar cell of the present invention comprises, from bottom to top, a substrate, an anode, a hole transport layer, a photoactive layer, an electron transport layer and a cathode. The material of the donor or the acceptor in the photoactive layer of the organic solar cell of the present invention is to adopt the organic material that has polymerizable group, when ultraviolet light triggers the photopolymerization of polymerizable group, the concentration of acceptor is determined by the cathode One side decreases toward the anode, and the concentration of the donor decreases from the anode side to the cathode, realizing the vertical phase separation of the donor and the acceptor, which is not only conducive to the formation of double continuous channels, but also ensures the transport of carriers. The built-in electric field in the direction is conducive to the struggle of electron-hole pairs and increases the short-circuit current, thereby improving the photoelectric conversion efficiency of the battery.

Description

technical field [0001] The invention belongs to the field of organic solar cell (OSC) and in particular relates to an organic solar cell which realizes vertical phase separation of an electron donor and an electron acceptor and a preparation method thereof. Background technique [0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect, also known as a photovoltaic cell. Solar cells can be divided into non-exciton type (such as inorganic silicon-based solar cells, etc.) and excitonic type (such as organic solar cells) according to whether excitons are formed. Among them, the excitonic solar cell has the advantages of simple manufacture, low temperature in the preparation process, low cost, and large-area flexible devices can be produced. Tang of Kodak Research Laboratory reported the first photovoltaic (photovoltaic) PV heterojunction exciton solar cell (C.W.Tang, "Two-layer organicph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCY02E10/549
Inventor 张立培陈志坚肖立新龚旗煌
Owner PEKING UNIV