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Room-temperature doping of ytterbium into efficient near-infrared emission CsPbBr1.5Cl1.5 perovskite quantum dots
Shuangyi Zhao1, Yubo Zhang, Zhigang Zang
1Key Laboratory of Optoelectronic Technology & Systems (Minster of Education), Chongqing University, Chongqing, China. zangzg@cqu.edu.cn.
Abstract:
Herein, we present a two-step method to dope various amounts of Yb into CsPbBr1.5Cl1.5 QDs at room temperature. It is found that the CsPbBr1.5Cl1.5 QDs can exhibit strong ∼990 nm near-infrared (NIR light) emission, and the NIR photoluminescence quantum yield (PLQY) is able to reach ∼90% when 10% Yb is doped in the CsPbBr1.5Cl1.5 QDs.
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