Characterisation of thin film CdSeTe/CdTe solar cells

薄膜 CdSeTe/CdTe 太阳能电池的表征

• 批准号: 2804948
• 金额: --
• 依托单位: Loughborough University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2804948
• 关键词: Characterisation; thin; film; CdSeTe; CdTe

Thin film CdsSeTe/CdTe photovoltaic (PV) devices are the most successful second-generation technology with over 9GW produced in 2022. The efficiency of thin-film PV is limited by atomic-scale defects in the material (grain boundaries, planar defects, point defects etc). The manufacture of a high efficiency cell typically requires some form of defect passivation treatment. Examples include activation of CdTe by annealing in CdCl2, passivation of grain boundaries by chlorine, passivation of grain interiors by selenium etc.... Recent work at Loughborough using HRTEM has shown that as deposited CdTe contains high densities of stacking faults and that these are removed by the CdCl2 activation process. Work using EBSD has shown that randomisation of the grain structure is important. Cathodoluminescence (CL) is a powerful technique that shows how defects, impurities or microstructure can affect luminescence at the nanoscale. A new capability in CL is being developed at Loughborough with facilities on SEM and on a new dedicated STEM instrument. This project aims to determine how atomic-scale defects degrade cell efficiency and the fundamental mechanisms underpinning their passivation. A variety of techniques will be used including electron microscopy and the new CL capability. Suitable devices will be fabricated in the Photovoltaics Materials and Devices group in the Centre for Renewable Energy Systems Technology (CREST). We will also work with our long-term collaborators at the National Renewable Energy laboratory (NREL), Swansea University and with industrial partners. This project will be part of a special relationship with CTF Solar GmbH who will provide devices fabricated in their R&D facility in Germany.

薄膜 CdsSeTe/CdTe 光伏 (PV) 器件是最成功的第二代技术，2022 年产量将超过 9GW。薄膜光伏的效率受到材料中原子级缺陷（晶界、平面缺陷、点缺陷等）的限制。高效电池的制造通常需要某种形式的缺陷钝化处理。例子包括通过在 CdCl2 中退火激活 CdTe、通过氯钝化晶界、通过硒钝化晶粒内部等...拉夫堡最近使用 HRTEM 进行的工作表明，沉积的 CdTe 含有高密度的堆垛层错，并且这些层错可以通过 CdCl2 激活过程去除。使用 EBSD 的工作表明，晶粒结构的随机化很重要。阴极发光 (CL) 是一种强大的技术，可以显示缺陷、杂质或微观结构如何影响纳米级的发光。拉夫堡正在利用 SEM 和新型专用 STEM 仪器开发 CL 的新功能。该项目旨在确定原子级缺陷如何降低电池效率以及支撑其钝化的基本机制。将使用多种技术，包括电子显微镜和新的 CL 功能。合适的器件将由可再生能源系统技术中心（CREST）的光伏材料和器件小组制造。我们还将与国家可再生能源实验室 (NREL)、斯旺西大学的长期合作伙伴以及工业合作伙伴合作。该项目将成为与 CTF Solar GmbH 特殊关系的一部分，CTF Solar GmbH 将提供在其德国研发工厂制造的设备。