Effect of thermal annealing on the redistribution of alkali metals in Cu(In,Ga)Se2 solar cells on glass substrate
Effect of thermal annealing on the redistribution of alkali metals in Cu(In,Ga)Se2 solar cells on glass substrate
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热退火对玻璃基板上Cu(In,Ga)Se2太阳能电池碱金属再分布的影响
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
S. Niki
中科院分区：
文献类型：
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作者：
Y. Kamikawa;J. Nishinaga;S. Ishizuka;T. Tayagaki;H. Guthrey;H. Shibata;K. Matsubara;S. Niki
通过后沉积处理（PDT）精确控制 Cu(In,Ga)Se2 (CIGS) 太阳能电池中碱金属浓度最近引起了人们的关注。当 PDT 在高温下进行时，预计会产生伴随的退火效应。在这里，我们研究热退火如何影响 CIGS 太阳能电池中碱金属在玻璃基板上的重新分布以及太阳能电池的性能。此外，我们还研究了使用三阶段工艺生长的 CIGS 的典型非均匀碱金属深度剖面的起源。特别是，我们使用二次离子质谱测量离子浓度作为距 CIGS 表面距离的函数，以研究热退火对 CIGS 吸收体中碱金属（Na、Ka 和 Rb）和组成元素（Ga 和 In）分布的影响。我们发现碱金属的深度剖面强烈反映了倾向于容纳碱金属的位点（即空位）的密度。高温退火引起碱金属的重新分布。碱金属的热扩散动力学很大程度上取决于所涉及的物质。我们引入低通量氟化钾 (KF) 来研究 KF-PDT 的副作用，即从 CIGS 中去除 Na，与其主要效应（例如表面改性）分开。当通过高温退火从钠钙玻璃中提供足够量的Na时，负面影响并不明显。相反，当Na供应不足时，会导致光伏性能恶化。通过后沉积处理（PDT）精确控制Cu（In，Ga）Se2（CIGS）太阳能电池中碱金属浓度最近引起了人们的关注。当 PDT 在高温下进行时，预计会产生伴随的退火效应。在这里，我们研究热退火如何影响 CIGS 太阳能电池中碱金属在玻璃基板上的重新分布以及太阳能电池的性能。此外，我们还研究了使用三阶段工艺生长的 CIGS 的典型非均匀碱金属深度剖面的起源。特别是，我们使用二次离子质谱测量离子浓度作为距 CIGS 表面距离的函数，以研究热退火对 CIGS 吸收体中碱金属（Na、Ka 和 Rb）和组成元素（Ga 和 In）分布的影响。我们发现碱金属的深度剖面强烈反映了倾向于容纳碱金属的位点（即空位）的密度。安纳莉...
The precise control of alkali-metal concentrations in Cu(In,Ga)Se2 (CIGS) solar cells via post deposition treatment (PDT) has recently attracted attention. When PDT is performed at an elevated temperature, an accompanying annealing effect is expected. Here, we investigate how thermal annealing affects the redistribution of alkali metals in CIGS solar cells on glass substrates and the properties of the solar cells. In addition, we investigate the origin of non-homogeneous alkali-metal depth profiles that are typical of CIGS grown using a three-stage process. In particular, we use secondary-ion mass spectrometry measurements of the ion concentration as a function of distance from the CIGS surface to investigate the impact of thermal annealing on the distribution of alkali metals (Na, Ka, and Rb) and constituent elements (Ga and In) in the CIGS absorbers. We find that the depth profiles of the alkali metals strongly reflect the density of sites that tend to accommodate alkali metals, i.e., vacancies. Annealing at elevated temperature caused a redistribution of the alkali metals. The thermal-diffusion kinetics of alkali metals depends strongly on the species involved. We introduced low flux potassium fluoride (KF) to study a side effect of KF-PDT, i.e., Na removal from CIGS, separately from its predominant effects such as surface modification. When sufficient amounts of Na are supplied from the soda lime glass via annealing at an elevated temperature, the negative effect was not apparent. Conversely, when the Na supply was not sufficient, it caused a deterioration of the photovoltaic properties.The precise control of alkali-metal concentrations in Cu(In,Ga)Se2 (CIGS) solar cells via post deposition treatment (PDT) has recently attracted attention. When PDT is performed at an elevated temperature, an accompanying annealing effect is expected. Here, we investigate how thermal annealing affects the redistribution of alkali metals in CIGS solar cells on glass substrates and the properties of the solar cells. In addition, we investigate the origin of non-homogeneous alkali-metal depth profiles that are typical of CIGS grown using a three-stage process. In particular, we use secondary-ion mass spectrometry measurements of the ion concentration as a function of distance from the CIGS surface to investigate the impact of thermal annealing on the distribution of alkali metals (Na, Ka, and Rb) and constituent elements (Ga and In) in the CIGS absorbers. We find that the depth profiles of the alkali metals strongly reflect the density of sites that tend to accommodate alkali metals, i.e., vacancies. Anneali...
影响因子：
3.2
作者：
Laemmle, Anke;Wuerz, Roland;Powalla, Michael
通讯作者：
Powalla, Michael