Application of grain boundary function to develop new materials for solar cells with high performance

应用晶界功能开发高性能太阳能电池新材料

• 批准号: 23656435
• 负责人: TSUREKAWA Sadahiro
• 金额: $ 2.41万
• 依托单位: Kumamoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23656435/
• 关键词: 太陽電池; 粒界; ポテンシャル障壁; 電気伝導; CdTe; Si; KFM; 第一原理計算; シリコン; 結晶粒界; ナノ結晶; CP-AFM; 多結晶; ケルビンプローブ原子間力顕微鏡; ショットキー障壁; 再結合損失

The motivation of this work was to study the origin of grain boundary function suitable for achieving enhanced conversion efficiency of microcrystalline CdTe solar cells, and then to obtain a principle of grain boundary design for development of new materials for solar cells with high performance. We have found the potential barrier associated with grain boundaries in CdTe depends not only on grain boundary character but also on polarity at grain boundaries arising from its crystal structure. In addition, the CdCl2 treatment, which increases the conversion efficiency of CdTe solar cells, was found to increase the grain boundary potential barrier. These findings show that grain boundaries in CdTe can act as the built-in potential for separation of photogenerated hole - electron pairs, and that Cl segregation to grain boundaries after the CdCl2 treatment would result in the enhancement of the role of the built-in potential rather than the passivation of defect states in the band-gap.

这项工作的目的是研究适合于提高微晶CdTe太阳电池转换效率的晶界函数的来源，从而获得开发高性能太阳能电池新材料的晶界设计原则。我们发现，与晶界有关的势垒不仅与晶界性质有关，而且还与其晶体结构引起的晶界极性有关。此外，研究还发现，提高CdTe太阳电池转换效率的CdCl2处理也增加了晶界势垒。这些结果表明，CdTe中的晶界可以起到分离光生空穴-电子对的内在势的作用，而在CdCl2处理后，氯偏析到晶界将导致内在势的作用增强，而不是使禁带中的缺陷态钝化。

项目成果

CdTe{111}/Σ3粒界の電子構造の第一原理計算

CdTe{111}/Σ3晶界电子结构的第一性原理计算

• 作者: 佐渡惇貴;菊地竜也;鈴木亮輔;倉内和則,中西貴之,伏見公志,長谷川靖哉,大塚俊明;中村聡志
• 通讯作者: 中村聡志

Nano-inswntation study of local plastic deformation in the vicinity of grain boundary

晶界附近局部塑性变形的纳米激化研究

• 发表时间: 2012
• 作者: N. Sato;M. Ojima;S. Morooka;Y. Tomota;Y. Adachi;K. Tashima
• 通讯作者: K. Tashima

Enhancement of the local magnetic moments at grain boundaries in ferromagnetic metals

铁磁金属晶界处局部磁矩的增强

• 发表时间: 2012
• 作者: K. Fushimi;Y. Takabatake;T. Nakanishi,Y. Hasegawa;足立吉隆;伏見公志;K. Hirayama;柳澤慧,伏見公志,中西貴之,長谷川靖哉,河野崇史,木村光男;足立吉隆;連川貞弘;高畠勇,伏見公志,中西貴之,長谷川靖哉;武井章生,中村貴宏,佐藤俊一;足立吉隆;S. Tsurekawa
• 通讯作者: S. Tsurekawa

Effect of post-GBE strain-sensitisation on corrosion resistance of grain boundary engineered 304 austenitic stainless steel

• DOI: 10.1080/14786435.2012.762467
• 发表时间: 2013-04
• 期刊: Philosophical Magazine
• 影响因子: 1.6
• 作者: G. Yamada;H. Kokawa;Y. Yasuda;S. Tokita;T. Yokoyama;Y. Sato;H. Fujii;S. Tsurekawa

Development of nanostructured tungsten based materials resistant to recrystallization and/or radiation induced embrittlement

• DOI: 10.2320/matertrans.mg201209
• 发表时间: 2013-04
• 期刊: Materials Transactions
• 影响因子: 1.2
• 作者: H. Kurishita;H. Arakawa;S. Matsuo;Tatsuaki Sakamoto;S. Kobayashi;K. Nakai;G. Pintsuk;J. Linke-