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

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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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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