Development of silicon heterojunction solar cells. Energy, Solar Technology

硅异质结太阳能电池的开发。

• 批准号: 1621825
• 金额: --
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2016
• 资助国家: 英国
• 起止时间: 2016 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1621825
• 关键词: Development; silicon; heterojunction; solar; cells.

Silicon solar cells account for over 90% of an enormous worldwide market, and silicons fundamental properties means it is likely to be a major technology for many years to come. The traditional approach to fabricating a silicon solar cell involves at least one high temperature (>800 degrees Celsius) diffusion step to form a p-n junction. Such high temperature processes are relatively expensive and can result in process contamination. An alternative approach is to use a heterojunction architecture, which involves depositing materials with different bandgaps on the substrate. This can result in solar cells with higher efficiencies than conventional diffusion-based solar cells. Depositions can also be performed at relatively low temperatures and hence this may result in a lower fabrication cost. This PhD project aims to perform underpinning work necessary to develop a new area of research for the UK. We aim to develop low cost processing routes to fabricate silicon heterojunction cells. Novel deposition processes will be investigated and novel materials for the transparent conducting electrodes will be explored. Test cell structures will be characterised using a suite of techniques available in Warwick, including quasi-steady-state photo conductance, photoluminescence imaging, and capacitance-voltage measurements. Processing will be optimised to minimise interface trap densities and to produce carrier-selective contacts. Fundamental knowledge will be gained on the recombination of carriers at interfaces, and the physics of carrier-selective contacts. The long-term aim of the research area is to produce a higher efficiency lower cost silicon-based solar cell than at present. It is expected that such a structure, once successfully optimised, may find a future use as a base cell for a silicon-based tandem cell, perhaps in combination with a perovskite top cell. This project aligns to EPSRC's Energy theme and the priority areas of Materials Technologies, Materials Characterisation, and Solar. The student will work closely with team members funded under the EPSRC SuperSilicon PV project (EP/M024911/1) and will use equipment already funded by EPSRC under grant EP/J01768X/2. The student will become part of the UKs PV community via the Supergen Solar Hub.

硅太阳能电池占全球巨大市场的 90% 以上，硅的基本特性意味着它很可能成为未来许多年的主要技术。制造硅太阳能电池的传统方法涉及至少一个高温（>800 摄氏度）扩散步骤以形成 p-n 结。这种高温工艺相对昂贵并且会导致工艺污染。另一种方法是使用异质结架构，其中涉及在基板上沉积具有不同带隙的材料。这使得太阳能电池比传统的基于扩散的太阳能电池具有更高的效率。沉积也可以在相对较低的温度下进行，因此这可以导致较低的制造成本。该博士项目旨在开展为英国开发新研究领域所需的基础工作。我们的目标是开发低成本加工路线来制造硅异质结电池。将研究新型沉积工艺并探索用于透明导电电极的新型材料。测试电池结构将使用沃里克提供的一套技术进行表征，包括准稳态光导、光致发光成像和电容电压测量。将优化工艺以最小化界面陷阱密度并产生载流子选择性接触。将获得有关界面处载流子复合以及载流子选择性接触物理学的基础知识。该研究领域的长期目标是生产比目前效率更高、成本更低的硅基太阳能电池。预计这种结构一旦成功优化，未来可能会用作硅基串联电池的基础电池，或许与钙钛矿顶部电池结合使用。该项目符合 EPSRC 的能源主题以及材料技术、材料表征和太阳能的优先领域。该学生将与 EPSRC SuperSilicon PV 项目 (EP/M024911/1) 资助的团队成员密切合作，并将使用 EPSRC 已根据赠款 EP/J01768X/2 资助的设备。该学生将通过 Supergen Solar Hub 成为英国光伏社区的一部分。