Polymer body heterojunction solar cell and preparation thereof

A bulk heterojunction and solar cell technology, which is applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve problems such as bandgap widening and matching degree reduction, and achieve improved performance, low production cost, and high production process simple effect

Active Publication Date: 2009-07-15
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To increase the open circuit voltage of the device, it is often necessary to reduce the highest occupied orbital (HOMO) energy level of the donor material (because the LUMO energy level of the acceptor material has little room for change), which means that the band gap of the donor material Broadens, less closely matches the solar spectrum
4) In terms of device stability and life, there is still a big gap compared with the practical requirements

Method used

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  • Polymer body heterojunction solar cell and preparation thereof
  • Polymer body heterojunction solar cell and preparation thereof
  • Polymer body heterojunction solar cell and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] select figure 2 The structure of the polymer bulk heterojunction solar cell device shown is poly[2,7-(9,9-dioctyl)fluorene-9,9-(bis(3'-(N,N-dimethyl )-N-ethylammonium)propyl)fluorene dibromide-4,7-dithiophen-2-yl-2,1,3-benzothiadiazole] (PFNBr-DBT15) as the cathode interface layer, fluorene and 4,7-dithiophen-2-yl-2,1,3-benzothiadiazole copolymer poly[2,7-(9,9-dioctyl)fluorene-copolymerization-4,7-dithiophene —2-base-2,1,3-benzothiadiazole] (PFO-DBT35) is used as polymer electron donor material, PCBM is electron acceptor material, and whether there is a cathode interface layer has a great influence on the polymer bulk heterojunction solar energy. The impact on the performance of the battery device is shown in Table 2.

[0058] It can be seen from this that the polymer bulk heterojunction solar cell with PFNBr-DBT15 as the interface layer, compared with conventional devices, its open circuit voltage is greatly increased from 0.60-0.75 volts to 0.90-1.00 volts (such as...

Embodiment 2

[0062] Repeat Example 1, select poly[9,9-dioctylfluorene-9,9-bis(N,N-dimethylaminopropyl) fluorene-4,7-dithiophene-2-yl-2,1 , 3-benzothiadiazole] (PFN-DBT15) as the cathode interface layer, other conditions remain unchanged. The experimental results are summarized in Table 3.

[0063] table 3

[0064]

[0065] As can be seen from Table 3, poly[9,9-dioctylfluorene-9,9-bis(N,N-dimethylaminopropyl)fluorene-4,7-dithiophen-2-yl-2, 1,3-Benzothiadiazole (PFN-DBT15) is used as the cathode interface layer of polymer bulk heterojunction solar cells. Compared with conventional devices, the open circuit voltage is greatly increased from 0.60-0.75 volts to 0.85 volts.

Embodiment 3

[0067] Repeat Example 1, select poly[2,5-dioctyloxy-1,4-phenylene-2,5-(bis(3'-(N,N-dimethyl)-N-ethylammonium ) Propyl-1,4-phenylene] dibromide (PPPNBr) is used as the cathode interface layer, and other conditions are constant. The experimental results are summarized in Table 4.

[0068] Table 4

[0069]

[0070]

[0071] As can be seen from Table 4, poly[2,5-dioctyloxy-1,4-phenylene-2,5-(bis(3'-(N,N-dimethyl)-N-ethyl Ammonium) propyl-1,4-phenylene] dibromide (PPPNBr) as the cathode interface layer of polymer bulk heterojunction solar cells, compared with conventional devices, its open circuit voltage is greatly improved from 0.60-0.75 volts to 0.90-1.00 volts (as image 3 shown).

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Abstract

The present invention provides a polymer body heterojunction solar battery and a preparation method thereof. The polymer body heterojunction solar battery comprises a glass substrate, an anode, an anode buffer layer, an optical activity layer, a cathode interface layer and a cathode which are stacked in turn. The cathode interface layer employs a conjugated polymer of a polar unit containing a polar group or an ionic group or a corresponding poly dielectric. The method dissolves the polymer as the cathode interface layer in an organic solvent to prepare a solution with a concentration of 0.0001-0.05 g/cm. The solution forms the cathode interface layer (5) on the optical activity layer (4) by using a spin coating, brushing, jet printing, dipping, roller coating, screen printing, printing or jet ink printing modes. The invention can greatly improve the performance of the polymer body heterojunction solar battery device, especially an importance index of an open circuit voltage; the preparation process is simple and the preparation cost is low by using the solution processing technology.

Description

technical field [0001] The invention relates to the field of photoelectric devices, in particular to the technical field of polymer bulk heterojunction solar cells, and in particular to a method for improving the performance of polymer bulk heterojunction solar cells, especially the open circuit voltage. Background technique [0002] Solar cells that convert solar energy into electrical energy based on the photovoltaic effect have always been a research hotspot at home and abroad. With the increasing global energy demand year by year, the depletion of primary energy such as oil and coal, and the need to protect the earth's environment, people are turning more and more attention to renewable energy such as solar energy and hydrogen energy. [0003] At present, mature solar cells on the market are mainly inorganic solar cells based on monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, indium phosphide, and polycrystalline compound semiconduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46H01L51/48
CPCY02E10/50Y02E10/549
Inventor 吴宏滨罗洁贺超曹镛
Owner SOUTH CHINA UNIV OF TECH
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