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Iodine-doped carbon material serving as cathode of dye-sensitized solar cell

A technology for solar cells and dye sensitization, applied in the field of iodine-doped carbon materials, can solve the problems of reducing battery performance, potential loss, complex process and the like, and achieve the effects of low cost, good stability and simple process

Inactive Publication Date: 2011-11-23
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual work, due to the current passing through the cathode of the dye-sensitized solar cell, if the catalytic performance of the cathode is low, polarization will occur, forming an overpotential, causing a loss of potential, and reducing the performance of the battery.
Therefore, in the preparation of traditional cathodes, conductive glass sheets are generally used as substrates, and different materials such as graphite, platinum, or conductive polymers are plated by different methods. Among them, the effect of platinum plating is better, but the cost is high and the process is complicated.

Method used

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preparation example Construction

[0033] 1) The preparation methods of these iodine-doped carbon materials are simple and can be prepared by different methods.

[0034] 2) The iodine-doped graphitized carbon prepared by high-temperature sintering of graphene oxide not only preserves the layered structure of graphitized carbon, but also has a large specific surface and good electrical conductivity and catalytic activity, and can prepare high-efficiency low cost battery. The iodine-doped carbon material prepared from non-graphitizable carbon has improved its catalytic activity due to the introduction of iodine element, and the efficiency of the prepared battery has also been greatly improved.

[0035] 3) The iodine-doped carbon material prepared by the present invention can be mixed with carbon black in different proportions as the cathode material of the dye-sensitized solar cell, so that the conductivity of the cathode material can be adjusted by adjusting the proportion of iodine element in the cathode and a...

Embodiment 1

[0037] Example 1: Dye-sensitized solar cell prepared with iodine-doped graphite sheet as cathode

[0038] Sinter 200mg of graphite oxide flakes and 1g of elemental iodine in a tube furnace at 900°C for 3 hours under a nitrogen atmosphere, and then place them in an oven at 70°C for 48 hours to allow the remaining elemental iodine to volatilize completely. The measured iodine atoms The content is 3.43%. Iodine-doped graphene was then coated onto conductive glass as a cathode, using TO with adsorbed dye molecules 2 It is the anode of the battery, and the dye molecule is N719.

[0039] figure 1 It is the scanning electron micrograph of the iodine-doped graphene prepared in embodiment 1. The obtained I-V curve is as Figure 4 As shown, the photoelectric conversion efficiency reaches 2.95%, while the photoelectric conversion efficiency of undoped graphene is only 0.06%, and the photoelectric conversion efficiency of the platinum electrode as the cathode is 4.6% under the same co...

Embodiment 2

[0040] Embodiment 2: Prepare iodine-doped graphene with solution reaction

[0041] Dissolve elemental iodine in ethanol, disperse graphene oxide in water, mix the two and react at 50-100°C for 24 hours, then centrifuge and wash with a large amount of ethanol, and dry in an oven at 50°C.

[0042] figure 2 It is the scanning electron micrograph of the iodine-doped graphene prepared in embodiment 2.

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Abstract

The invention discloses an iodine-doped carbon material serving as a cathode of a dye-sensitized solar cell. The material is iodine-doped graphite structure carbon, iodine-doped non-graphite structure carbon or an iodine-doped carbon material which is formed by sintering marine biomass respectively, wherein iodine accounts for 1 to 10 weight percent of the material, carbon accounts for 70 to 90 weight percent of the material, and hydrogen accounts for 0 to 5 weight percent of the material. The invention also discloses a preparation method and application of the material. The iodine-doped carbon material serving as the cathode of the solar cell has excellent performance, the solar conversion efficiency is equivalent to that of a platinum electrode, and the iodine-doped carbon material has the advantages of low cost, simple preparation method and the like.

Description

technical field [0001] The invention relates to an iodine-doped carbon material. [0002] The present invention also relates to a preparation method of the above-mentioned iodine-doped carbon material. [0003] The present invention also relates to the application of the above-mentioned iodine-doped carbon material in dye-sensitized solar cells. Background technique [0004] With the development of society, human beings' demand for energy is getting higher and higher, and the non-renewable fossil energy commonly used at present can no longer meet the needs of human beings. Therefore, how to effectively utilize renewable new energy sources such as solar energy and biomass energy has become a major issue in the energy field. Based on this, the development of new and efficient solar or biomass energy conversion devices has become one of the research hotspots. [0005] Solar energy is the most active field in the development and utilization of new energy. Solar cells current...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/04H01B13/00H01G9/042H01G9/20H01M14/00H01L51/44H01L51/46
CPCY02E10/50Y02E10/542Y02E10/549
Inventor 崔光磊段玉龙张小影刘志宏徐红霞陈骁韩鹏献李莉姚建华朱玉伟
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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