Multi-junction solar cell with quantum well structured tunneling junctions and manufacturing method
A multi-junction solar cell and tunneling junction technology, applied in the field of multi-junction solar cells and fabrication, can solve problems such as the reduction of effective doping concentration and carrier tunneling probability, and the reduction of tunneling junction tunneling current, so as to improve the Tunneling current, the effect of increasing the probability of tunneling
Active Publication Date: 2019-08-20
YANGZHOU CHANGELIGHT
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However, as the material band gap increases, the effective doping concentration of the material and the probability of carrier tunneling will decrease, resulting in a sharp decrease in the tunneling current of the tunneling junction.
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[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0041] refer to figure 1 , figure 1 A schematic structural diagram of a multi-junction solar cell with a quantum well structure tunnel junction provided for an embodiment of the present invention, the multi-junct...
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The invention discloses a multi-junction solar cell with quantum well structured tunneling junctions and a manufacturing method. The first tunneling junction and the second tunneling junction of the multi-junction solar cell are quantum well structures, wherein the number of the quantum well structures can be single or multiple, and the quantum well structure has a quantum confinement effect, generates discrete quantum levels and localizes electrons and holes. The design of the quantum well structures in the tunneling junctions can increase the tunneling probability of the electrons and holesthrough the localized energy levels generated by the quantum well structures, thereby improving the tunneling current to a great extent.
Description
technical field [0001] The invention relates to the technical field of solar cells, more specifically, to a multi-junction solar cell with quantum well structure tunnel junctions and a manufacturing method. Background technique [0002] Solar cells can directly convert solar energy into electricity, which is the most efficient form of clean energy. Gallium arsenide triple-junction solar cells have completely replaced Si solar cells and become The main power source of the space vehicle. Among them, the conversion efficiency of gallium arsenide triple-junction solar cells represented by GaInP / InGaAs / Ge has exceeded 30% under the space spectrum (AMO), and the conversion efficiency has exceeded 40% under the condition of high concentration of light on the ground. The leader in conversion efficiency. [0003] In the structure of gallium arsenide multi-junction solar cells, the introduction of tunnel junctions can realize the series connection between sub-cells, solve the batte...
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IPC IPC(8): H01L31/0352H01L31/0687H01L31/0693H01L31/18B82Y40/00
CPCB82Y40/00H01L31/035236H01L31/0687H01L31/0693H01L31/1808H01L31/1844Y02E10/544Y02P70/50
Inventor 吴真龙韩效亚张策张海林王玉
Owner YANGZHOU CHANGELIGHT