GOALI: Polarized Infrared Imaging for the Mechanics of Photovoltaic Wafers

GOALI：用于光伏晶片力学的偏振红外成像

• 批准号: 1300466
• 负责人: Harley Johnson
• 金额: $ 39.84万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-01 至 2017-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1300466&HistoricalAwards=false
• 关键词: GOALI; Polarized; Infrared; Imaging; Mechanics

The research objective of this Grant Opportunity for Academic Liaison with Industry (GOALI) award is to investigate the mechanics of stress, defects, and failure in thin silicon photovoltaic wafers using a combination of infrared photoelasticity and polarized photoluminescence inspection techniques. Silicon wafers are the most common base material in solar cells, but due to stress and defects that arise during the crystal growth process, material losses during manufacturing remain a significant problem. Under support from this award, the relationship between stress and defects in photovoltaic wafers will be studied directly using lock-in infrared photoelasticity. Also, a new class of inspection techniques based on a lock-in polarized photoluminescence method, in which both intensity and polarization of emitted light is measured, will be developed and used to study the interaction of stress and defects with light absorbed or emitted by the material. Finally, the relationship between stress and failure in these materials will be investigated using a series of imaging and fracture experiments.The award will support a collaborative effort between university and industry researchers. The research could have significant impact in the solar energy industry, as it will help to explain the role of stress and defects in photovoltaic wafer failure, and could enable a pathway to rapid inspection and sorting of silicon photovoltaic wafers based on the probability of mechanical failure. The results will also add to the fundamental understanding of the interaction of light with defects in crystalline materials. In addition to the research objectives, the award will support graduate and undergraduate education and training. The academic/industry partnership will be highlighted by the annual summer placement of a graduate research assistant in the industry facility to learn characterization and manufacturing methods. Undergraduate students will be involved through an engineering outreach event at the University of Illinois, and through research in the laboratory of the Principle Investigator.

这项学术联络人与行业联络人的研究目标是研究压力，缺陷和薄硅光伏瓦金的失败机制，并使用红外光弹性和两极化的光致发光检验技术组合。 硅晶片是太阳能电池中最常见的基本材料，但是由于晶体生长过程中出现的压力和缺陷，制造过程中的材料损失仍然是一个重大问题。 在该奖项的支持下，将使用锁定红外光弹直接研究应力与缺陷之间的关系。 同样，将开发并使用基于锁定偏振光发光方法的新的检查技术，其中测量发射光的强度和极化，并用于研究应力和缺陷与材料吸收或发射的光的相互作用。 最后，将使用一系列成像和断裂实验研究这些材料的压力与失败之间的关系。该奖项将支持大学和行业研究人员之间的协作努力。 这项研究可能会在太阳能行业中产生重大影响，因为它将有助于解释压力和缺陷在光伏晶片失败中的作用，并可以根据机械故障的可能性来快速检查和对硅光伏晶片进行快速检查和分类。 结果还将增加对光与晶体材料缺陷的相互作用的基本理解。 除研究目标外，该奖项还将支持研究生和本科教育和培训。 学术/行业的伙伴关系将由行业设施的研究生研究助理的年度夏季安置来强调，以学习表征和制造方法。本科生将通过伊利诺伊大学的工程外展活动以及在主要研究人员的实验室进行研究。