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Ternary blending organic polymer solar cell device

A technology for solar cells and polymers, applied in the fields of electric solid devices, electrical components, semiconductor devices, etc., can solve the problems of open-circuit voltage and absorption spectrum limitations, complex production process of tandem cells, etc., achieve optimal photoelectric conversion efficiency, improve photoelectricity Conversion efficiency, the effect of broadening the spectral absorption range

Active Publication Date: 2017-11-17
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The concept of the ternary blend system is the same as that of laminated devices to broaden the absorption spectrum of solar cells, but the manufacturing process of laminated cells is relatively complicated, which is not conducive to the continuous production and processing of large areas by solution spin coating
However, the two electron acceptor materials used are still fullerene derivatives, and there are still limitations in open circuit voltage and absorption spectrum.

Method used

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  • Ternary blending organic polymer solar cell device
  • Ternary blending organic polymer solar cell device
  • Ternary blending organic polymer solar cell device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: with figure 1 The three materials shown in are used as active layer materials for ternary blend organic polymer solar cell devices. Among them, the bandgap (Eg) of the wide bandgap polymer donor material P3 is 1.8eV; the molecular weight of the non-fullerene small molecule acceptor material ITIC is 1430, and the bandgap (Eg) is 1.7eV.

[0021] ITO / ZnO(30nm) / P3: ITIC: PC 71 BM(120nm) / MoO 3 (8.5nm) / Ag(100nm) device structure such as figure 2 shown. The content (mass percentage) of the non-fullerene small molecule acceptor material ITIC in the active layer of the device is 10%-60%. The fabrication process of the device is as follows:

[0022] 1. The ITO (transparent electrode) glass substrate is first cleaned with a detergent, and then rinsed with tap water, deionized water, and ethanol in order to remove surface grease and dust. Afterwards, deionized water, acetone, and isopropanol were used to sonicate for 15 minutes each, and placed in a vacuum dryi...

Embodiment 2

[0027] Example 2: A reference device was prepared according to the method of Example 1, except that the active layer of the device was a binary blend system, respectively P3:PCBM and P3:ITIC. The optimal performance of the obtained organic polymer solar cell device is as follows:

[0028] P3: PCBM system: open circuit voltage is 0.77V, short circuit current density is 12.64mA / cm -2 , the fill factor is 0.75, and the photoelectric conversion efficiency is 7.29%.

[0029] P3: ITIC system: open circuit voltage is 0.93V, short circuit current density is 12.56mA / cm -2 , the fill factor is 0.64, and the photoelectric conversion efficiency is 7.47%. The performance of device in embodiment 2 is obviously worse than the device performance in embodiment 1, as image 3 shown.

Embodiment 3

[0030] Example 3: In order to verify that the ternary blend system can enhance spectral complementarity and battery efficiency, we have tested the external quantum efficiency (IPCE) of the device of Example 1 and Example 2.

[0031] Tested in an atmospheric environment with a spot size of 1mm 2 under a tungsten light source simulator. From Figure 4 We can find that the spectral absorption of the device of the embodiment 1 is greatly broadened compared with the device of the embodiment 2, and the external quantum efficiency reaches 75%.

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Abstract

The present invention relates to a ternary blending organic polymer solar cell device. The device is characterized that: the active layer of the solar cell comprises three components and is obtained by blending of a fullerene receptor, a non-fullerene micromolecule receptor and broad-band gap conjugated polymer donor materials so as to realize the hypersorption of the active layer of the device from ultraviolet band of a solar spectrum to the near-infrared band of a solar spectrum. The organic polymer solar cell device prepared by the method is simple in preparation technology, can effectively widen the absorption spectrum of the solar cell and can regulate the morphology of the active layer of the cell according to different receptor proportions to regulate and control the open-circuit voltage so as to greatly improve the photoelectric conversion efficiency of the device. The organic polymer solar cell device prepared through a solution method is widely applied in the solar cell device field.

Description

technical field [0001] The invention belongs to the field of organic semiconductor devices, and relates to a ternary blend active layer structure in organic polymer solar cells. Background technique [0002] With the increasing energy shortage and environmental pollution, solar energy has been widely valued as a clean and renewable energy. In recent years, organic polymer solar cells have been widely and deeply researched and achieved rapid development, and their photoelectric conversion efficiency has been greatly improved, but there is still a long way to go before commercialization. It is undeniable that the further improvement of battery efficiency is a new bottleneck encountered by organic polymer solar cells. Only through innovative thinking and new strategies can the problem be solved, and the space for further improvement of efficiency can be opened up to make organic polymers The energy conversion efficiency of bio solar cells has reached the point of commercial ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44
CPCH10K85/113H10K85/215H10K85/655H10K30/20Y02E10/549
Inventor 薄志山陆恒徐新军
Owner BEIJING NORMAL UNIVERSITY
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