题目：

Efficient Near-Infrared Electroluminescence from Lanthanide-Doped Perovskite Quantum Cutters

作者：

Yan-Jun Yu^1#, Chen Zou^1,2,3*^#, Wan-Shan Shen^1#, Xiaopeng Zheng², Qi-Sheng Tian¹, You-Jun Yu¹, Chun-Hao Chen¹, Baodan Zhao³, Zhao-Kui Wang¹, Dawei Di³*, Osman M. Bakr²*, and Liang-Sheng Liao^1,4*

单位：

¹Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, China.

²Divison of Physical Sciences and Engineering, King Abdullah University of Science and technology, Thuwal 23955-6900, Saudi Arabia.

³State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering; International Research Center for Advanced Photonics, Zhejiang University, Hangzhou, China.

⁴Macao Institute of Materials Science and Engineering, Macau University of Science and Technology, Macau SAR, Taipa 999078, China.

摘要：

Perovskite nanocrystals (PeNCs) deliver size and composition-tunable luminescence of high efficiency and color purity in the visible. However, attaining efficient electroluminescence (EL) in the near-infrared (NIR) region from PeNCs is challenging, limiting their potential applications. Here we demonstrate a highly efficient NIR light emitting diode (LED) by doping ytterbium ions into the PeNCs host (Yb3+: PeNCs), extending the EL wavelengths toward 1000 nm, which is achieved through a direct sensitization of Yb3+ ions by the PeNC host. Efficient quantum cutting processes enable high photoluminescence quantum yields (PLQYs) of up to 126% from the Yb3+:PeNCs. Through halide-composition engineering and surface passivation strategy to improve both PLQY and charge transport balance, we demonstrate an efficient NIR LED with a peak EQE of 7.7% at a central wavelength of 990 nm, representing the most efficient perovskite- based LEDs with emission wavelengths beyond 850 nm.

影响因子：

16.823

分区情况：

一区

链接：

https://onlinelibrary.wiley.com/doi/10.1002/anie.202302005