Conversion of broadband UV-visible light to near infrared emission by Ca 14 Zn 6 Al 10 O 35 : Mn 4+ , Nd 3+ /Yb 3

• Published in: RSC advances Vol. 6; no. 9; pp. 7544 - 7552
• Main Authors: Gao, Xuejun, Xia, Wenbin, Chen, Tiejin, Yang, Xiaoliang, Jin, Xiangliang, Xiao, Siguo
• Format: Journal Article
• Language: English
• Published: 2016
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/C5RA18479G

Efficient Ca 14 Zn 6 Al 10 O 35 : Mn 4+ , Nd 3+ /Yb 3+ spectral conversion materials have been prepared by a sol–gel method. The Ca 14 Zn 6 Al 10 O 35 : Mn 4+ , Nd 3+ /Yb 3+ materials can efficiently shift the short-wavelength sunlight in 250–550 nm spectral regions into near infrared emission which matches the higher sensitivity region of Si-based solar cells. The maximal energy transfer efficiency is 76.0% and 80.4% in Mn 4+ , Nd 3+ and Mn 4+ , Yb 3+ co-doped samples when excited at 460 nm, respectively. A dipole–dipole interaction is responsible for the energy transfer sensitization processes from Mn 4+ to Nd 3+ /Yb 3+ ions, which has been confirmed by Dexter's theory and the Yokota–Tanimoto model.