Near-infrared quantum cutting in Ce3+, Yb3+ co-doped YBO3 phosphors by cooperative energy transfer

✍ Scribed by JinDeng Chen; Hai Guo; ZhengQuan Li; Hao Zhang; YiXi Zhuang

• Book ID: 104075603
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 367 KB
• Volume: 32
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2010.01.040

✦ Synopsis

An efficient near-infrared (NIR) quantum cutting (QC) in Ce 3+ , Yb 3+ co-doped YBO 3 phosphors has been demonstrated, which involves the emission of two low-energy NIR photons (around 973 nm) from an absorbed ultra-violet (UV) photon at 358 nm via a cooperative energy transfer (CET) from Ce 3+ to Yb 3+ ions. Yb 3+ concentration dependent quantum efficiency has been calculated and the maximum efficiency approaches up to 175% before reaching the critical concentration quenching threshold. The development of NIR QC Ce 3+ , Yb 3+ co-doped phosphors may open up a new approach to achieve high efficiency siliconbased solar cells by means of downconversion.