Progress in near-infrared quantum cutting of Tb3+-Yb3+ ion pair

Abstract

Abstract: Near-infrared quantum cutting is a promising approach to enhance the efficiency of silicon solar cells. There are many different kinds of rare earth elements, and each of them has abundant energy levels. Researchers prepare luminescent materials doped with rare earth elements; measure the absorption spectra, the excitation spectra and emission spectra of the materials. According to these data, they calculate the quantum efficiency of luminescent materials. The Tb3+-Yb3+ ions have been drawing people’s attention. Upon excitation of Tb3+ ion with a ultraviolet-visible photon, Yb3+ ion can emit two near-infrared photons around 1000 nm through cooperative energy transfer from Tb3+ ion to Yb3+ ion. The near-infrared photons can be absorbed by silicon solar cells. The quantum efficiency varies from concentration of Tb3+/Yb3+ ions as well as the matrix of material.

Key words: spectroscopy；near-infrared quantum cutting；Tb3+-Yb3+ ions；energy transfer

CLC Number:

TN2
O482.3

YANG Xiao-dong, CHEN Xiao-bo，CHEN Luan，Zhou Gu，FENG Qian，WANG Shui-feng，LIU Jie，LI Song，LIU Jin-ying，ZHOU Yu-sheng，WANG Ya-fei，CHENG Huan-li. Progress in near-infrared quantum cutting of Tb3+-Yb3+ ion pair[J]. J4, 2014, 31(4): 466-471.

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