Progress in the understanding of light‐ and elevated temperature‐induced degradation in silicon solar cells: A review
Progress in the understanding of light‐ and elevated temperature‐induced degradation in silicon solar cells: A review
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对光和高温引起的硅太阳能电池退化的理解进展：综述
DOI：
10.1002/pip.3362
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Catherine E. Chan
中科院分区：
文献类型：
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作者：
Daniel Chen;M. Vaqueiro Contreras;A. Ciesla;P. Hamer;B. Hallam;M. Abbott;Catherine E. Chan
目前，在商业上占主导地位且迅速发展的光伏器件技术是基于新南威尔士大学开发的钝化发射极和后电池（PERC）设计。然而，人们发现这种技术存在载流子诱导的降解问题，通常被称为“光和高温诱导降解”（LeTID），可能导致高达16%的相对性能损失。LeTID最近被证明在几乎所有类型的硅片中都存在，与掺杂材料无关。尽管已知降解机制可以在正常运行条件下恢复，但这是一个漫长的过程，会极大地影响发电量、稳定性，并最终影响已安装系统的平均电力成本（LCOE）。尽管许多研究小组共同努力，但退化的根本原因仍然未知。在这里，我们提供了现有文献的概述，并描述了LeTID的关键特征，以及这些特征如何导致各种潜在机制理论的发展。此外，鉴于氢参与LeTID的不断出现和强有力的证据，人们提出了许多关于氢化的缓解方法。我们讨论这些报告的方法，牢记在持续电池性能和最小化LCOE方面的关键消费者必需品。
At present, the commercially dominant and rapidly expanding PV‐device technology is based on the passivated emitter and rear cell (PERC) design developed at UNSW. However, this technology has been found to suffer from a carrier‐induced degradation commonly referred to as ‘light‐ and elevated temperature‐induced degradation’ (LeTID) and can result in up to 16% relative performance losses. LeTID was recently shown to occur in almost every type of silicon wafer, independent of the doping material. Even though the degradation mechanism is known to recover under normal operation conditions, it is a lengthy process that drastically affects the energy yield, stability and, ultimately, the levelized cost of electricity (LCOE) of installed systems. Despite the joint effort of many research groups, the root cause of the degradation is still unknown. Here, we provide an overview of the existing literature and describe key LeTID characteristics and how these have led to the development of various theories of the underlying mechanism. Further, given the continuously appearing and strong evidence of hydrogen involvement in LeTID, many mitigation methods concerning hydrogenation have been suggested. We discuss such reported methods, bearing in mind crucial consumer necessities in terms of sustained cell performance and minimised LCOE.