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Solar cell based on surface plasma reinforcing principle and preparing method thereof

A surface plasmon and solar cell technology, applied in circuits, capacitors, photosensitive devices, etc., can solve problems such as poor thermal stability, and achieve the effects of increasing effective separation, facilitating flexible selection, and high safety performance.

Active Publication Date: 2014-06-25
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the material of light-transmitting conductive electrodes used in solar cells is metal oxide, commonly known as conductive glass (such as indium tin oxide, fluorine tin oxide), but metal ions in conductive glass are easy to diffuse spontaneously, and have strong absorption for infrared spectrum property, and its thermal stability is poor (Adv.Mater.,2011,23(13):1514–1518); people urgently need a low-cost material that can replace conductive glass to further promote the industrialization process of solar cells ( Nanotechnology, 2012, 23(8): 085201–1–6)

Method used

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  • Solar cell based on surface plasma reinforcing principle and preparing method thereof
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  • Solar cell based on surface plasma reinforcing principle and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1. A solar cell device using single crystal zinc oxide as a wide bandgap semiconductor and K-19 dye as a photoexcitable dye; gold and silver are used as targets to vapor-deposit on graphene sheets.

[0069] The specific device preparation method is as follows:

[0070] 1. Preparation of ultra-flat zinc oxide wafers: prepare ultra-flat zinc oxide semiconductors (thickness 500nm) by magnetron sputtering, and then perform single-sided mechanical polishing on the zinc oxide wafers; Or ultrasonic cleaning in absolute ethanol for 30 minutes; then rinse with ultrapure water for 5 minutes, then rinse with deionized water for about 10 minutes, and finally blow dry with high-purity nitrogen.

[0071] 2. Evaporate low work function metals such as indium and silver on the non-mechanically polished side of the zinc oxide wafer as the back electrode; clamp the zinc oxide wafer to the top metal plate of the vacuum coating machine, so that the vacuum degree is pumped to 4.5×...

Embodiment 2

[0079] Embodiment 2, a solar cell device using monocrystalline titanium dioxide as a wide bandgap semiconductor and N719 dye as a photoexcitable dye; gold is evaporated on a graphene sheet as a target material.

[0080] The specific device preparation method is as follows:

[0081] 1. Preparation of ultra-flat titanium dioxide wafer: prepare ultra-flat titanium dioxide semiconductor (thickness is 300nm) by magnetron sputtering method, then perform single-sided mechanical polishing of titanium dioxide wafer; then etch with 35% HF aqueous solution for 8min, Then etch in 20W oxygen plasma for 80s.

[0082] 2. Evaporate low work function metals such as indium and silver on the non-mechanically polished side of the titanium dioxide wafer as the back electrode; clamp the titanium dioxide wafer on the top metal plate of the vacuum coating machine, so that the vacuum degree is pumped to 4.5×10 -4 Pa, according to the molar ratio of indium:silver of 1:1, it is vapor-deposited on the b...

Embodiment 3

[0089] Embodiment 3, a solar cell device using single crystal titanium dioxide as a wide bandgap semiconductor and Z907 dye as a photoexcitable dye; using pure silver as a target material to vapor-deposit on a graphene sheet.

[0090] The specific device preparation method is as follows:

[0091] 1. Preparation of ultra-flat titanium dioxide wafer: prepare ultra-flat titanium dioxide semiconductor (thickness 800nm) by magnetron sputtering method, and then perform single-sided mechanical polishing of titanium dioxide wafer; then etch with 35% HF aqueous solution for 8 minutes , and then etched in 20W oxygen plasma for 80s.

[0092] 2. Evaporate low work function metals such as indium and silver on the non-mechanically polished side of the titanium dioxide wafer as the back electrode; clamp the titanium dioxide wafer on the top metal plate of the vacuum coating machine, so that the vacuum degree is pumped to 4.5×10 -4 Pa, indium:silver is vapor-deposited on the back of the tita...

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Abstract

The invention discloses a solar cell based on a surface plasma reinforcing principle and a preparing method of the solar cell. The solar cell comprises a wide band gap semiconductor layer, a photosensitization dye layer, a graphene layer and a metal nanoparticle layer, wherein the wide band gap semiconductor layer, the photosensitization dye layer, the graphene layer and the metal nanoparticle layer are arranged on a back electrode in sequence in a stacked mode. According to the solar cell, a local electromagnetic field around particles is greatly improved through local surface plasmons of the metal nanoparticles, and incident optical field energy is stored around the surfaces of the nanometer particles, so that effective excitation is conducted on optical excitation dye, and the efficiency of light absorption of the solar cell is improved. Meanwhile, single-layer graphene is used for replacing an electrolyte solution and a counter electrode in a traditional cell, the cell structure is simplified, the safety performance of the cell is effectively improved, and the solar cell has huge potential in industrial production and application.

Description

technical field [0001] The invention relates to a solar cell based on the principle of surface plasmon enhancement and a preparation method thereof. Background technique [0002] Among the ranks of new energy sources, solar energy accounts for more than 99% of the total energy of the earth, is clean and has large reserves, and is gradually becoming the main force of the new energy industry (Chem. Rev. 2010, 110, 6595). The solar cell is an important carrier that converts solar energy into electrical energy. It mainly uses the photovoltaic effect of photovoltaic semiconductor materials for photoelectric conversion; the main researched semiconductor materials are: single crystal silicon, polycrystalline silicon, multi-component compounds, organic semiconductors, dyes Sensitization, etc. (Chem. Rev, 2007, 107:1324-1338). [0003] Compared with traditional silicon solar cells, organic dye-sensitized solar cells have become an emerging force due to their low cost, and are also a...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042H01G9/032H01G9/004H01G9/14
CPCY02E10/542
Inventor 郭雪峰李新喜贾传成张国庆
Owner PEKING UNIV
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