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Middle series connection layer and production method thereof, laminated photovoltaic device and preparation method thereof

A photovoltaic device and stacking technology, applied in photovoltaic power generation, semiconductor devices, final product manufacturing, etc., can solve the problems of efficiency reduction and overall open circuit voltage drop of stacked photovoltaic devices, so as to reduce the degree of decline, improve the overall open circuit voltage and Efficiency, Effect of Reducing Reverse Barrier Height

Pending Publication Date: 2022-01-28
LONGI GREEN ENERGY TECH CO LTD
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Problems solved by technology

[0005] The present invention provides an intermediate series layer and its production method, a laminated photovoltaic device and its preparation method, aiming to solve the problem that the overall open circuit voltage and efficiency of the laminated photovoltaic device decrease due to the use of the existing intermediate series layer to connect each battery unit in series

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  • Middle series connection layer and production method thereof, laminated photovoltaic device and preparation method thereof
  • Middle series connection layer and production method thereof, laminated photovoltaic device and preparation method thereof
  • Middle series connection layer and production method thereof, laminated photovoltaic device and preparation method thereof

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Embodiment Construction

[0056]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0057] The inventors found in the research that: in the prior art, the use of intermediate series layers or transparent conductive films in series connection of each battery unit leads to a decrease in the overall open circuit voltage and efficiency of stacked photovoltaic devices. The main reason is that: the existing two intermediate series layers On both sides of the interface in contact with the upper and lower battery cells, a ce...

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Abstract

The invention provides a middle series connection layer and a production method thereof, and a laminated photovoltaic device and a preparation method thereof, and relates to the technical field of photovoltaics. The middle series connection layer comprises a potential barrier layer and quantum dot structures dispersed in the potential barrier layer. The quantum dot structure dispersed in the barrier layer depends on the quantum confinement effect, a controllable tunneling channel is established in the barrier layer, the controllable tunneling channel can assist carriers of corresponding energy levels in high-efficiency resonance tunneling, the tunneling efficiency of the corresponding carriers is improved, tunneling current is greatly improved, contact resistance is reduced, the reverse barrier heights of the two sides of the middle series connection layer are reduced, the reduction degree of the overall open-circuit voltage of the laminated photovoltaic device is further reduced, and the overall open-circuit voltage and efficiency of the laminated photovoltaic device are improved. Meanwhile, by means of a discrete energy level structure established in the barrier layer, the contact resistance is effectively controlled, so that the series resistance is relatively low.

Description

technical field [0001] The invention relates to the field of photovoltaic technology, in particular to an intermediate serial layer and a production method, a laminated photovoltaic device and a preparation method. Background technique [0002] Stacked photovoltaic devices can divide sunlight into multiple bands. From the front to the back, solar cells with gradually decreasing band gaps are used to absorb sunlight of different energies in order to broaden the spectral response band to sunlight and reduce energy loss. Therefore, stacked photovoltaic devices have broad application prospects. [0003] Currently, stacked photovoltaic devices usually use an intermediate series layer or a transparent conductive film to series each battery unit. [0004] However, in the prior art, in the process of using the above two kinds of intermediate serial layers to connect the battery cells in series, the overall open-circuit voltage and efficiency of the laminated photovoltaic device wil...

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Application Information

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IPC IPC(8): H01L31/0216H01L31/0687H01L31/18
CPCH01L31/02167H01L31/0687H01L31/18Y02E10/544Y02P70/50
Inventor 吴兆徐琛李子峰
Owner LONGI GREEN ENERGY TECH CO LTD
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