An organic solar cell having a cascaded metal grating structure

A technology of solar cells and metal gratings, applied in the field of solar cells, can solve the problems of cell production cost, efficiency, and service life, which affect the market prospect of the application market, and achieve the effect of broadband absorption enhancement and thickness reduction

Active Publication Date: 2018-12-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the current photovoltaic application market, crystalline silicon solar cells occupy a dominant position, but multiple factors such as cell production cost, efficiency, lifespan and specific application markets will affect the future market prospects

Method used

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  • An organic solar cell having a cascaded metal grating structure
  • An organic solar cell having a cascaded metal grating structure
  • An organic solar cell having a cascaded metal grating structure

Examples

Experimental program
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Embodiment 1

[0023] Such as figure 1 As shown, it is a schematic cross-sectional view of an organic solar cell with a cascaded metal grating structure proposed in this embodiment, which includes a conductive thin film layer 1, a hole transport layer 2, a uniform absorption layer 3, and a grating layer 4 from top to bottom. With the back cathode 5, wherein, the uniform absorption layer 3 and the grating absorption layer, that is, the grating groove 41 are both active layers; the grating layer 4 is a one-dimensional periodic structure formed by a plurality of cascaded gratings with the same structure arranged laterally, each The cascaded grating includes a first grating, a second grating, a third grating and a fourth grating arranged in sequence with equal periods, and the grating ridge width W of the first grating, the second grating, the third grating and the fourth grating is 1 , W 2、 W 3 , W 4 increase in turn, the material of the uniform absorption layer 3 is PTB7:PC mixed in a ratio...

Embodiment 2

[0029] The structure of an organic solar cell with a cascaded metal grating structure proposed in this embodiment is the same as that of the first embodiment, the difference is that in this embodiment, the thickness T of the uniform absorption layer 3 and the thickness H of the grating layer 4 are respectively are 10nm and 40nm, the period P of the cascaded metal grating structure is 400nm, and the period p of each grating is 100nm. In addition, the grating ridge width W of the first grating, the second grating, the third grating, and the fourth grating 1 , W 2、 W 3 , W 4 They are 10 nanometers, 30 nanometers, 40 nanometers, and 50 nanometers.

[0030] Such as image 3 Shown is the spectral line diagram of the absorption efficiencies of the cascaded metal grating solar cells and the four non-cascaded metal grating solar cells of this embodiment. The structures of these four non-cascaded metal grating solar cells are basically the same as in this embodiment, and they all i...

Embodiment 3

[0033] The structure of an organic solar cell with a cascaded metal grating structure proposed in this embodiment is the same as that of the first embodiment and the second embodiment, the difference is that in this embodiment, the thickness T of the uniform absorption layer 3 and the grating layer The thickness H of 4 is 10 nanometers and 40 nanometers respectively, the period P of the cascaded metal grating structure is 480nm, and the period p of each grating is 120nm. In addition, the grating ridge width W of the first grating, the second grating, the third grating, and the fourth grating 1 , W 2、 W 3 , W 4 They are 12nm, 24nm, 36nm and 60nm respectively. In this embodiment, the average absorption efficiency of the solar cell with this structure can reach 47.2%.

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Abstract

The invention belongs to the technical field of solar cells and provides an organic solar cell having a cascaded metal grating structure. The organic solar cell comprises a conductive film layer, a hole transport lay, a uniform absorbing layer, a grating layer and a back cathode, which are arranged from top to bottom; the grating layer is a one-dimensional periodic structure formed by arranging aplurality of cascaded gratings with the same structure transversely; each of the cascaded gratings includes a first grating, a second grating, a third grating, and a fourth grating which have the equal period and are arranged in sequence, wherein the grating ridge widths W1, W2, W3, and W4 of the first grating, the second grating, the third grating, and the fourth grating are sequentially increased, and the grating ridge heights of the first grating, the second grating, the third grating, and the fourth grating are equal. The invention improves the absorption efficiency of the solar cell and realizes broad spectrum absorption.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to an organic solar cell with a cascaded metal grating structure. Background technique [0002] In the current photovoltaic application market, crystalline silicon solar cells occupy a dominant position, but multiple factors such as the production cost, efficiency, lifespan and specific application markets of the cells will affect the future market prospects. Compared with traditional crystalline silicon solar cells, organic solar cells have the advantages of being compatible with the fabrication of large-area flexible substrates and capable of roll-to-roll production at lower temperatures to achieve low-cost mass production. hotspot. [0003] In silicon solar cells, micron-scale or sub-micron-scale light-trapping structures are often used to reduce the thickness of the active layer and improve the light absorption capacity of the device. However, the active layer ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/44
CPCH10K30/87Y02E10/549
Inventor 刘欣王丹杨毅彪费宏明曹斌照张明达
Owner TAIYUAN UNIV OF TECH
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