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Organic solar cell

A solar cell and organic technology, applied in the field of solar cells, can solve the problems of sufficient response and low photoelectric conversion efficiency, and achieve the effects of avoiding corrosion, improving photoelectric conversion efficiency, and prolonging service life

Active Publication Date: 2013-10-09
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] As we all know, compared with silicon-based inorganic solar cells, the photoelectric conversion efficiency of organic solar cells is still lower. Therefore, improving the photoelectric conversion efficiency is the core technical problem that needs to be solved for the industrialization of organic solar cells.
However, due to the limitation of the forbidden band width of organic substances in the photoactive layer of organic solar cells, it is impossible for organic substances to fully respond to the spectrum of all bands, that is, the light bands with lower energy in the solar spectrum cannot excite the photoactive layer. organic matter to generate excitons, which also leads to the limitation of organic solar cells for the absorption of sunlight. Therefore, without affecting other performances, improving the light absorption efficiency of the photoactive layer becomes an effective way to improve organic solar cells. important means

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no. 1 example approach

[0052] see figure 1 , figure 1 It is a schematic diagram of the structure distribution of the first embodiment of the organic solar cell of the present invention. Such as figure 1 As shown, the organic solar cell 10 is an inverted structure, specifically including a substrate 11, and the material of the substrate 11 can be hard, such as glass or quartz, or flexible, such as flexible polymer. Polymer materials that can be used as flexible substrates include (but are not limited to): polyethylene naphthalate (PEN; polyethylene naphthalate), polyethylene terephthalate (PET; polyethylene terephthalate), polyamide (polyamide) , Polymethylmethacrylate, Polycarbonate or Polyurethane. Flexible substrates can be used in continuous processes, such as web-coating or lamination processes. In addition, in addition to insulating materials, the substrate may also be made of conductive materials, such as titanium, aluminum, copper, nickel and other metal materials. The thickness of the s...

no. 2 example approach

[0074] See also figure 1 Compared with the structure of the organic solar cell shown in the first embodiment, the difference between the second embodiment and the first embodiment is that an organic small molecule layer doped with a light-emitting material is formed on the cathode 12, which is the electron transport layer 13 , wherein the luminescent material is C545T, the small organic molecule in the small organic molecule layer is Alq3, the doping concentration of C545T is 7%, and the rest of the technical solutions are the same as the first embodiment.

no. 3 example approach

[0076] See also figure 1 Compared with the structure of the organic solar cell shown in the third embodiment, the only difference between the third embodiment and the first embodiment is that an organic small molecule layer doped with a luminescent material is formed on the cathode 12, which is the electron transport layer 13 , wherein the luminescent material is C545T, the small organic molecule in the small organic molecule layer is Alq3, the doping concentration of C545T is 10%, and the rest of the technical solutions are the same as those of the first embodiment.

[0077] The application compares the embodiment of the present invention with the implementation effect of the prior art (with the four core characteristic parameters of the solar cell - the open circuit voltage V OC , Short-circuit current density J SC , fill factor FF photoelectric conversion efficiency n, for specific comparison, see Table 2 below for details:

[0078] Table 2 The implementation effect compa...

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Abstract

The invention discloses an organic solar cell which comprises an anode of a collection hole, a cathode of a collection electron, a photoactive layer and an electron transfer layer, wherein the photoactive layer generates a hole-electron pair and is arranged between the anode and the cathode, and the electron transfer layer is arranged between the cathode and the photoactive layer. The electron transfer layer is a small organic molecule layer. Luminescent materials are mingled in the small organic molecule layer. The luminescent materials absorb the energy of a waveband and emit an optical waveband easily absorbed by the photoactive layer, wherein the waveband is not absorbed by the photoactive layer or the light absorption efficiency of the waveband is low. Therefore, the light absorption efficiency of the photoactive layer is improved, and the photovoltaic conversion efficiency of the solar cell is effectively improved.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to an organic solar cell. Background technique [0002] The development of the times requires a large amount of energy, and fossil energy, as a direct primary energy source, has been used in large quantities and is increasingly depleted, which has become a bottleneck restricting development. As a continuous source of clean energy, solar energy has attracted more and more attention. Among them, making high-efficiency solar cells to convert solar energy into electrical energy has become an important method for utilizing solar energy. Solar cells are mainly divided into inorganic solar cells (mainly made of silicon-based or other inorganic material substrates) and organic solar cells. Organic solar cells are increasingly valued due to their advantages such as easy availability of materials, low cost, easy large-scale production, and flexibility. , so it has gradually become a ve...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/46
CPCY02E10/549
Inventor 唐建新谢浩俊李艳青马国富
Owner SUZHOU UNIV
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