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Intermediate connecting layer of organic tandem solar cell and high-efficiency solar cell

A stacked cell and solar cell technology, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of unreachable, lack, high photoelectric conversion efficiency, etc., and achieve the effect of improving the utilization rate

Active Publication Date: 2017-10-10
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the interlayer based on ultra-thin metal (Green, 1, 2011, 65–80), due to the lack of suitable electron or hole transport layer, the tandem solar cell device based on the ultra-thin metal interlayer cannot achieve high photoelectric conversion efficiency

Method used

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  • Intermediate connecting layer of organic tandem solar cell and high-efficiency solar cell
  • Intermediate connecting layer of organic tandem solar cell and high-efficiency solar cell
  • Intermediate connecting layer of organic tandem solar cell and high-efficiency solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 10 nm molybdenum oxide and 12 nm silver were deposited on an ITO glass substrate. A 10 nm thin film of PFN was subsequently spin-coated. The structure has good electrical characteristics, the sheet resistance is 8Ω / □, and the work function is shown in figure 2 .

[0043] figure 2 Among them, A represents the ITO substrate, B represents the deposition of 10nm molybdenum oxide on the ITO substrate, C represents the deposition of 10nm molybdenum oxide and 14nm silver on the ITO substrate, D represents the deposition of 10nm molybdenum oxide, 14nm silver and 10nm PFN on the ITO substrate, E represents the deposition of 10nm oxide on the ITO substrate Molybdenum and 10nm PFN, F means 10nm PFN film deposited on ITO substrate. It can be seen that the two sides of the intermediate connection layer have different work functions, and can form good hole and electron ohmic contacts with the front sub-cell and the back sub-cell respectively, thereby forming a good connection. ...

Embodiment 2

[0045] Deposit 10nm molybdenum oxide, 12nm silver and 10nm PFN film on glass substrate, the structure is reflective, its optical properties are as image 3 As shown, A represents the transmittance curve, and B represents the reflectance curve. It can be seen that the intermediate connection layer has strong reflectivity, and at the same time, the light loss caused by the intrinsic absorption of the intermediate connection layer is very weak. This shows that the intermediate layer has the possibility of modulating the light field distribution in the device, and at the same time, the intermediate connection layer can be used in the device as an effective connection layer.

Embodiment 3

[0047] The glass substrate covered with ITO was ultrasonically washed with detergent, isopropanol, ethanol, and acetone for 15 minutes in sequence, and after being treated with ultraviolet-ozone, a zinc oxide electron transport layer with a thickness of 20-40nm was prepared by solution spin coating. Then spin-coat benzodiindenethiophene-quinoxaline alternating copolymer (PIDT-PhanQ) of about 60nm on it: PC 71 BM photosensitive layer and annealed on a hot stage at 120 °C for 5 min to form the front subcell.

[0048] Deposit molybdenum oxide of about 10nm and silver of 4nm, and then spin-coat a PFN film of about 10nm to form an intermediate connection layer.

[0049] Finally spin coat 80nm PTB-7:PC 71 BM thin film photosensitive layer, deposit 10nm molybdenum oxide hole transport layer and 100nm silver electrode to form the back sub-cell. get as figure 1 The shown organic tandem solar cell has a photoelectric conversion efficiency of 8.6%.

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Abstract

The invention discloses an intermediate connecting layer of an organic series laminated solar cell and the high-efficiency solar cell formed therefrom. There is also an intermediate metal electrode layer with a work function between the hole transport layer and the electron transport layer between the hole transport layer and the electron transport layer of the intermediate connection layer. The thickness of the intermediate metal electrode layer is 2-20nm, and The solar cell is formed by arranging the front sub-cell and the back sub-cell respectively above and below the intermediate connection layer. On the one hand, the present invention can effectively collect the charges from the sub-cells and effectively recombine them; on the other hand, it can adjust the distribution of the light field in the device, thereby balancing the short-circuit current of the two sub-cells, and at the same time forming a strong optical micro-domain effect, so that The light utilization rate of the device is improved.

Description

technical field [0001] The invention relates to an intermediate connecting layer and a solar cell, in particular to an intermediate connecting layer of an organic series laminated solar cell and a high-efficiency solar cell formed therefrom. Background technique [0002] Organic tandem solar cell devices have higher photoelectric conversion efficiency than single-junction solar cell devices. In this structure, the intermediate connection layer is the key. Currently, poly(3,4-ethylenedioxythiophene: polystyrene sulfonate (PEDOT: PSS) / zinc oxide is the most commonly used intermediate connection layer (Nat.Comm., 4, 2013, 1446), however due to the : PSS has acidity and certain light absorption, which leads to device instability and light loss. At the same time, water-based PEDOT:PSS must be modified to form a better film on the surface of the lipophilic photosensitive layer. However, in the interlayer based on ultra-thin metal (Green, 1, 2011, 65–80), due to the lack of suit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44
CPCH10K30/65H10K30/80Y02E10/549
Inventor 陈红征左立见
Owner ZHEJIANG UNIV
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