Synchrotron radiation effect on CIS thin films prepared by laser ablation for solar cell application

同步辐射对太阳能电池用激光烧蚀制备的 CIS 薄膜的影响

• 批准号: 11680508
• 负责人: YAMAMOTO Yukio
• 金额: $ 2.37万
• 依托单位: Fukui National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11680508/
• 关键词: CuInSe_2; CuInS_2; CIS solar cell; synchrotron radiation; laser ablation

CuInSe_2 and its related thin films (CIS thin films) have attracted considerable attention for photovoltaic energy application. Solar cell has an advantage for energy production in cosmic space. However, very few reports have been published for reliability of CIS based solar cell at this severe situation. In this study, CIS thin films were prepared by laser ablation method and characterized crystallographic stability before and after the radiation of synchrotron beam.In the first year we have constructed the laser ablation system which consists of vacuum chamber, vacuum pump, and ArF excimer laser. In the chamber, target made by two binary compounds were placed and high energy beam (excimer laser light) is focused onto it. CIS thin films were deposited and were characterized the structural properties using by XRD, SEM, and XPS.The thin films had densely packed columnar grains. In the next year, samples were set into another ultra high vacuum chamber at Spring-8 in order to irradiate the synchrotron beam. The thin films were characterized crystallinity again, after the irradiation. We also examined x-ray absorption study for Cu 2p->3d transition for the samples. CIS thin films prepared by excimer laser ablation revealed high crystallographic quality and its structural stability would be useful for cosmic solar cell application. Further investigation for electrical properties of the CIS thin films before and after the synchrotron irradiation is necessary using XAFS measurement.

CuInSe_2及其相关薄膜（CIS薄膜）在光伏能源应用方面引起了广泛的关注。太阳能电池在宇宙空间能源生产方面具有优势。然而，很少有报道已发表的CIS基太阳能电池在这种严峻的形势下的可靠性。本研究采用激光烧蚀法制备CIS薄膜，并对同步辐射前后CIS薄膜的晶体学稳定性进行了表征。第一年我们建立了由真空室、真空泵和ArF准分子激光器组成的激光烧蚀系统。在反应室中放置由两种二元化合物制成的靶，用高能准分子激光束聚焦靶，制备了CIS薄膜，并利用XRD、SEM、XPS等手段对薄膜的结构进行了表征，薄膜具有致密的柱状晶粒。在接下来的一年里，样品被设置到另一个超高真空室在春天-8为了照射同步加速器光束。薄膜在辐照后再次表征结晶度。我们还研究了样品的Cu 2 p->3d跃迁的X射线吸收研究。用准分子激光烧蚀法制备的CIS薄膜具有较高的晶体质量和结构稳定性，有望应用于宇宙太阳能电池。利用XAFS测量对CIS薄膜在同步辐射前后的电学性质进行进一步的研究是必要的。