材料导报, 2009, 23(z1): 24-26.
纳米微晶长大团聚的理论研究
1.中北大学化工与环境学院,太原,030051
2.中北大学化工与环境学院,太原,030051
{"currentpage":1,"firstResult":0,"maxresult":10,"pagecode":5,"pageindex":{"endPagecode":5,"startPagecode":1},"records":[{"abstractinfo":"This paper presents a systematic investigation on the incorporation of chemical exfoliation graphene sheets (GS) in TiO(2) nanoparticle films via a molecular grafting method for dye-sensitized solar cells (DSSCs). By controlling the oxidation time in the chemical exfoliation process, both high conductivity of reduced GS and good attachment of TiO(2) nanoparticles on the GS were achieved. Uniform GS/TiO(2) composite films with large areas on conductive glass were prepared by electrophoretic deposition, and the incorporation of 65 significantly improved the conductivity of the TiO(2) nanoparticle film by more than 2 orders of magnitude. Moreover, the power conversion efficiency for DSSC based on GS/TiO(2) composite films is more than 5 times higher than that based on TiO(2) alone, indicating that the incorporation of GS is an efficient means for enhancing the photovoltaic (PV) performance. The better PV performance of GS/TiO(2) DSSC is also attributed to the better dye loading of GS/TiO(2) film than that of TiO(2) film. The effect of GS content on the PV performances was also investigated. It was found that the power conversion efficiency increased first and then decreased with the increasing of GS concentration due to the decrease in the transmittance at high GS content. Further improvements can be expected by fully optimizing fabrication conditions and device configuration, such as increasing dye loading via thicker films. The present synthetic strategy is expected to lead to a family of composites with designed properties.","authors":[],"categoryName":"|","doi":"","fpage":"3482","id":"8cb531db-9334-48d3-9a79-9277eb098d57","issue":"6","journal":{"abbrevTitle":"AN","id":"f5f2dd1b-c863-4099-a5ae-f3d4c782f971","issnPpub":"1936-0851","publisherId":"AN","title":"Acs Nano"},"keywords":[{"id":"562ca2f2-4c40-41a1-9745-ecc5cbc48bd5","keyword":"graphenes;titanium dioxide;molecular-level incorporation;composite;films;dye-sensitized solar cells;oxide;transparent;nanosheets;reduction;gas","originalKeyword":"graphenes;titanium dioxide;molecular-level incorporation;composite;films;dye-sensitized solar cells;oxide;transparent;nanosheets;reduction;gas"}],"language":"en","publisherId":"1936-0851_2010_6_1","title":"Incorporation of Graphenes in Nanostructured TiO(2) Films via Molecular Grafting for Dye-Sensitized Solar Cell Application","volume":"4","year":"2010"},{"abstractinfo":"Dye-sensitized solar cell (DSC) consists a combination of several different materials: photoanodes with nanoparticulated semiconductors, sensitizers, electrolytes and counter electrodes (CEs). Each materials performs specific task for the conversion of solar energy into electricity. The main function of CE is to transfer electrons to the redox electrolyte and regenerate iodide ion. The work of CE is mainly focused on the studies of the kinetic performance and stability of the traditional CEs to improve the overall efficiency of DSC, seeking novel design concepts or new materials. In this review, the development and research progress of different CE materials and their electrochemical performance, and the problems are discussed.","authors":[{"authorName":"Kexin LI","id":"9ecc34d4-7fe1-4cfd-9378-f0ac4424d48d","originalAuthorName":"Kexin LI"},{"authorName":" Zhexun YU","id":"e215605c-52c0-477a-a3ce-a10c90e1beab","originalAuthorName":" Zhexun YU"},{"authorName":" Yanhong LUO","id":"e3c8ed67-61f1-4413-af7e-c1f7dfb6894c","originalAuthorName":" Yanhong LUO"},{"authorName":" Dongmei LI","id":"be70ed05-9660-463f-9631-04d72cffaa4c","originalAuthorName":" Dongmei LI"},{"authorName":" Qingbo MENG","id":"9b69db58-34ad-4561-af3a-aeba3af10b70","originalAuthorName":" Qingbo MENG"}],"categoryName":"|","doi":"","fpage":"577","id":"fea3cfae-68cb-4070-8788-8353a13e959a","issue":"5","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"24ad25a3-0d25-415a-a366-54166a3dd71e","keyword":"Counter electrode","originalKeyword":"Counter electrode"},{"id":"7e43e1de-d129-4df3-b748-660263004f6b","keyword":"null","originalKeyword":"null"},{"id":"d7bb01c1-d63b-400b-90cb-d82871105b86","keyword":"null","originalKeyword":"null"},{"id":"5db88938-bd59-496a-a874-25bcdba6b9a1","keyword":"null","originalKeyword":"null"}],"language":"en","publisherId":"1005-0302_2007_5_19","title":"Recent Progress of Counter Electrodes in Nanocrystalline Dye-sensitized Solar Cells","volume":"23","year":"2007"},{"abstractinfo":"The SrTiO(3)-coated TiO(2) (TiO(2)/SrTiO(3)) electrodes prepared by radio frequency magnetron sputtering are used to improve the performance of dye-sensitized TiO(2) solar cells by means of surface modification. The structural and performance characterizations reveal that the TiO(2)/SrTiO(3) electrodes, in comparison with fresh TiO(2) electrodes, have low density of oxygen vacancies, passivated surface states, and suppressed interfacial recombination effect, thus resulting in improved performance parameters of the cells. An optimized coating of SrTiO(3) layer on the TiO(2) film surface allows an enhancement of the power conversion efficiency from 4.78% to 5.91%. (C) 2011 American Institute of Physics. [doi:10.1063/1.3617460]","authors":[],"categoryName":"|","doi":"","fpage":"","id":"ac548422-12b1-479f-b580-719f01cff04f","issue":"4","journal":{"abbrevTitle":"APL","id":"5e3c428a-be96-46d5-bcb9-94a4fce832b0","issnPpub":"0003-6951","publisherId":"APL","title":"Applied Physics Letters"},"keywords":[{"id":"37e392ba-d4c2-4a31-ae81-fa822b26d09e","keyword":"plasma treatment;surface modification;films;performance;coatings;state","originalKeyword":"plasma treatment;surface modification;films;performance;coatings;state"}],"language":"en","publisherId":"0003-6951_2011_4_1","title":"SrTiO(3) modified TiO(2) electrodes and improved dye-sensitized TiO(2) solar cells","volume":"99","year":"2011"},{"abstractinfo":"Single crystalline anatase TiO(2) rods with dominant reactive {010} facets are directly synthesized by hydrothermally treating Cs(0.68)Ti(1.83)O(4)/H(0.68)Ti(1.83)O(4) particles. The nanosized rods show a comparable conversion efficiency in dye-sensitized solar cells (DSSCs), and a superior photocatalytic conversion of CO(2) into methane to the benchmark P25 TiO(2) nanocrystals.","authors":[],"categoryName":"|","doi":"","fpage":"8361","id":"c80dc142-ed72-45b7-bf26-571c3da08e43","issue":"29","journal":{"abbrevTitle":"CC","id":"bc860499-8143-4c16-bd4e-19ac0b92dcca","issnPpub":"1359-7345","publisherId":"CC","title":"Chemical Communications"},"keywords":[{"id":"c43bf841-f660-4316-8b9c-039cfdfe7f25","keyword":"carbon-dioxide;reduction;photocatalyst;efficiency;surfaces;water","originalKeyword":"carbon-dioxide;reduction;photocatalyst;efficiency;surfaces;water"}],"language":"en","publisherId":"1359-7345_2011_29_1","title":"Synthesis of anatase TiO(2) rods with dominant reactive {010} facets for the photoreduction of CO(2) to CH(4) and use in dye-sensitized solar cells","volume":"47","year":"2011"},{"abstractinfo":"Modified TiO2 films have been prepared by combining commercial titania powders (Degussa P25) with sol-gel made by titanium chloride (Ti-sol). The result shows that clusters are formed by nanoparticles and large pores can be seen on the surface of the TiO2 films. The short circuit photocurrent density and photoelectric conversion efficiency of the solar cells are obviously enhanced compared with those without modification. The relationship between the photoelectric conversion efficiency and the amount of Ti-sol was investigated. With the addition of 30 wt% Ti-sol, the photoelectric conversion efficiency as high as 9.75% is achieved, increasing by 28.3% compared with the solar cells without modification.","authors":[{"authorName":"Yunfeng Zhao","id":"58db9570-d935-48f2-956b-04eecc41aa90","originalAuthorName":"Yunfeng Zhao"}],"categoryName":"|","doi":"","fpage":"764","id":"425afc38-8708-4e71-a796-ad8248560fb0","issue":"8","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"4fa7f9f4-224a-4c00-a0fe-1bbd4613b282","keyword":"Sol-gel","originalKeyword":"Sol-gel"}],"language":"en","publisherId":"1005-0302_2011_8_24","title":"Enhancement of the Photoelectric Performance of Dye-sensitized Solar Cells by Sol-gel Modified TiO2 Films","volume":"27","year":"2011"},{"abstractinfo":"Modified TiO2 films have been prepared by combining commercial titania powders (Degussa P25) with sol-gel made by titanium chloride (Ti-sol). The result shows that clusters are formed by nanoparticles and large pores can be seen on the surface of the TiO2 films. The short circuit photocurrent density and photoelectric conversion efficiency of the solar cells are obviously enhanced compared with those without modification. The relationship between the photoelectric conversion efficiency and the amount of Ti-sol was investigated. With the addition of 30 wt% Ti-sol, the photoelectric conversion efficiency as high as 9.75% is achieved, increasing by 28.3% compared with the solar cells without modification.","authors":[{"authorName":"Yunfeng Zhao","id":"fce98579-3f7d-4e54-a69f-91802946737d","originalAuthorName":"Yunfeng Zhao"}],"categoryName":"|","doi":"","fpage":"764","id":"5b5a1a9b-ca78-416e-a06d-4d32e2301aba","issue":"8","journal":{"abbrevTitle":"CLKXJSY","coverImgSrc":"journal/img/cover/JMST.jpg","id":"11","issnPpub":"1005-0302 ","publisherId":"CLKXJSY","title":"材料科学技术（英文）"},"keywords":[{"id":"ba7ebae5-fa2c-44db-96be-b4c3119a84a1","keyword":"Sol-gel","originalKeyword":"Sol-gel"}],"language":"en","publisherId":"1005-0302_2011_8_9","title":"Enhancement of the Photoelectric Performance of Dye-sensitized Solar Cells by Sol-gel Modified TiO2 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