Hexagonal β-NaYF4:Yb3+, Er3+ Nanoprism-Incorporated Upconverting Layer in Perovskite Solar Cells for Near-Infrared Sunlight Harvesting

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• 作者：Jongmin Roh ; Haejun Yu ; Jyongsik Jang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：August 10, 2016
• 年：2016
• 卷：8
• 期：31
• 页码：19847-19852
• 全文大小：391K
• 年卷期：0
• ISSN：1944-8252

文摘

Hexagonal β-NaYF₄:Yb³⁺, Er³⁺ nanoprisms, successfully prepared using a hydrothermal method, were incorporated into CH₃NH₃PbI₃ perovskite solar cells (PSCs) as an upconverting mesoporous layer. Due to their near-infrared (NIR) sunlight harvesting, the PSCs based on the upconverting mesoporous layer exhibited a power conversion efficiency of 16.0%, an increase of 13.7% compared with conventional TiO₂ nanoparticle-based PSCs (14.1%). This result suggests that the hexagonal β-NaYF₄:Yb³⁺, Er³⁺ nanoprisms expand the absorption range of the PSC via upconversion photoluminescence, leading to an enhancement of the photocurrent.