Efficient near-infrared quantum cutting in Ce³⁺-Yb³⁺ codoped glass for solar photovoltaic

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• 作者：Zijun Liu ; Jinyan Li ; Luyun Yang ; Qiaoqiao Chen ; Yingbo Chu ; Nengli Dai
• 关键词：Quantum cutting ; Energy transfer ; Solar cells ; Glasses ; Rare-earth ions
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：March, 2014
• 年：2014
• 卷：122
• 期：Complete
• 页码：46-50
• 全文大小：684 K

文摘

We report that Ce³⁺ can be an efficient sensitizer for Yb³⁺ and a broadband absorber for blue solar spectra. The broadband excitation for near-infrared (NIR) emission is ranged from 350 nm to 500 nm. The allowed 4f鈫?d transition and the adjustable lowest 5d level make the energy transfer from Ce³⁺ to Yb³⁺ efficiently. Therefore the quantum efficiency (QE) is also very high up to 154.3%. Furthermore, the energy of Yb³⁺²F_7/2鈫?sup>2F_5/2 transition matches well with the band gap of a single-junction Si. Given the broad excitation band, high absorption coefficient and excellent mechanical, thermal, and chemical stability, this system can be used as down-conversion (DC) layer for solar cells.