Light-emitting board for prolonging dye sensitization solar battery operating time
A solar cell and working time technology, applied in photovoltaic power generation, photosensitive equipment, capacitor parts and other directions, can solve the problems of reduced photoelectric conversion efficiency of batteries, prolonged working time of dye-sensitized solar cells, etc., to improve the utilization rate and prolong the working time effect of time
Inactive Publication Date: 2012-08-01
IRICO
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Problems solved by technology
The light-absorbing substance in the dye-sensitized solar cell is the dye. Because the dye has a strong light-absorbing ability, it still has a good photoelectric conversion efficiency under weak light. Because more electrons are generated under strong light, a large number of anode electrons It cannot flow to the cathode in a short time, but gathers at the anode, causing the photoelectric conversion efficiency of the battery to decrease under strong light
[0003] Due to the special energy level structure of the rare earth-doped long afterglow material, the electrons excited to the conduction band are temporarily trapped in the band gap trap, and it takes a certain time for the electron to jump back from the trap to the conduction band, so the long afterglow material absorbs light. It can continue to emit light for more than 10 hours. Although the light intensity is constantly attenuating, it can still reach the working light intensity of the dye-sensitized solar cell, especially when using nano-scale long afterglow materials. Strong afterglow effect, so that the working time of dye-sensitized solar cells with long afterglow luminescent panels is greatly extended
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[0020] The present invention will be described in further detail below in conjunction with accompanying drawing:
[0021] The long afterglow luminescent material used in the present invention is a relatively mature material in the prior art, and its molecular composition can be R 1-x-y Al 2 o 4 :xEu 2+ , yRE 3+ , where R represents Ca or Sr, RE represents Nd or Yb, 0.7≤x≤0.99, 0.01≤y≤0.2.
[0022] can also be R 1-x-y S:xEu 2+ , yRE 3+ , where R represents Ca or Sr, RE represents Nd or Yb, 0.7≤x≤0.99, 0.01≤y≤0.2.
[0023] In addition, the long-lasting luminescent material layer 13 is formulated into a slurry by using the existing technology, and then a layer of nanometer-length particles with a thickness ranging from 20 to 80 μm is deposited on the glass plate using screen printing technology and annealing technology at a temperature range of 400° C. to 500° C. Afterglow luminescent material.
[0024] The technical solution adopted by the present invention to solve the...
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The invention relates to a luminescent plate, in particular to a luminescent plate which can prolong working time of a dye sensitized solar battery. The luminescent plate is characterized in that the luminescent plate comprises two glass plates which are parallel to each other, a long afterglow luminescent material layer (13) is arranged between the two glass plates, and the back face of one of the glass plates is coated with an aluminum film (14) with thickness of between 0.2 and 2mm. The long afterglow luminescent material of the invention can continuously light for more than 10 hours, the emission wavelength can be adjusted between 400 and 600nm at the same time, and the waveband just conforms to the strong absorption range of the dye in the battery, so that the luminescent plate can obviously prolong the working time of the dye sensitized solar battery. Therefore, the utilization ratio of sun light and the use efficiency of the prior dye sensitized solar battery are improved.
Description
technical field [0001] The invention relates to a luminescent panel, in particular to a luminescent panel for prolonging the working time of a dye-sensitized solar cell. Background technique [0002] Dye-sensitized solar cells will become a representative of a new generation of solar cells due to their low production cost and simple production process. The light-absorbing substance in the dye-sensitized solar cell is the dye. Because the dye has a strong light-absorbing ability, it still has a good photoelectric conversion efficiency under weak light. Because more electrons are generated under strong light, a large number of anode electrons It cannot flow to the cathode in a short time, but gathers at the anode, causing the photoelectric conversion efficiency of the battery to decrease under strong light irradiation. [0003] Due to the special energy level structure of the rare earth doped long afterglow material, the electrons excited to the conduction band are temporaril...
Claims
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IPC IPC(8): H01G9/20H01G9/004
CPCY02E10/542
Inventor 王大伟
Owner IRICO