Title

Near-Infrared Quantum Cutting via Downconversion Energy Transfers in Ho<sup>3 </sup>/ Yb<sup>3 </sup> Codoped Tellurite Glass Ceramics.

Authors

Zhou, Xianju; Wang, Yongjie; Zhao, Xiaoqi; Li, Li; Wang, Zhongqing; Li, Qingxu; Hintzen, H. T. J. M

Abstract

The different concentration of Ho3+/ Yb3+ codoped tellurite glasses were prepared by high-temperature melting-quenching method. On excitation of Ho3+ ions with blue photon at 449 nm as well as ultraviolet ( UV) photon at 360 nm, the near infrared emission at 977 nm from Yb3+ and 981, 1020 nm from Ho3+, which could be absorbed by silicon and enhance the efficiency of the silicon-based solar cell, were observed. The energy-transfer process of Ho3+ and Yb3+ ions and involved mechanism have been investigated and discussed. The first-order energy transfer ( ET) through cross relaxation and a back ET from Yb3+ to Ho3+ occurred in the near-infrared quantum cutting ( NIR QC) system are proposed and verified. The NIR quantum efficiency achieved 166% when Yb3+ doping concentration is 20 mol%.

Subjects

TELLURITES; METALLIC glasses synthesis; HOLMIUM ions; PHOTONS; SOLAR cells

Publication

Journal of the American Ceramic Society, 2014, Vol 97, Issue 1, p179

ISSN

0002-7820

Publication type

Academic Journal

DOI

10.1111/jace.12679