非晶硅/晶体硅异质结太阳电池载流子输运机制与界面钝化特性研究

项目名称： 非晶硅/晶体硅异质结太阳电池载流子输运机制与界面钝化特性研究

项目编号： No.61274061

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 赵雷

作者单位： 中国科学院电工研究所

项目金额： 82万元

中文摘要： 非晶硅/晶体硅异质结(SHJ)太阳电池是国际上公认的一种低成本高效率的太阳电池，但除日本Sanyo公司外，世界各大研究机构或公司都难以获得高效率，说明人们对它的认识仍然不甚清楚。因而，本项目拟深入研究SHJ太阳电池的载流子输运机制，通过变温变光强I-V曲线测试，分析判明在高效电池中占主导地位的载流子输运类型；并通过对硅衬底进行掺杂氢等离子体预处理的方式来调节改善SHJ界面的能带结构；进而采用等离子体辉光发射谱(OES)对沉积非晶硅层的等离子体状态进行即时监测，分析确定非晶硅层钝化性能与等离子体状态间的依赖关系，从等离子体的角度揭示非晶硅层界面钝化的内在机制。通过本项目的研究，能够探明SHJ太阳电池的高效机理，从而对具体太阳电池制备工艺提供理论指导。

中文关键词： 非晶硅/晶体硅异质结；载流子输运；界面钝化；太阳电池；

英文摘要： Amorphous/crystalline silicon heterojunction (SHJ) solar cell is recognized as one kind of low cost and high efficiency solar cell in the world. However, it is difficult for most institutes and companies to obtain high efficiency currently, except for Sanyo, which indicates that SHJ solar cell has still not been understood clearly by the researchers. So, the proposed project here will investigate the carrier transport mechanisms of the SHJ solar cell carefully and make the dominant mechanism clear for high efficiency solar cell by temperature and illumination intensity dependent I-V curve testing. The energy band structure of the SHJ interface will be improved by performing doped hydrogen plasma pretreatment on the silicon substrate. Further, the plasma state of the amorphous silicon deposition will be in-situ monitored by plasma optical emission spectroscopy(OES). The plasma state dependence of the passivation effect of the amorphous silicon layer will be analyzed systematically. It is expected to reveal the passivation mechanism based on the plasma state. By the investigation of this project, the mechanism for SHJ solar cell to obtain high efficiency can be illuminated clearly and the expected achievements can provide theoritical guidance for the practical fabrication process of the SHJ solar cell.

英文关键词： Amorphous/crystalline silicon heterojunction；Carrier transport；Interface passivation；Solar cell；