Near-Infrared LEDs Based on Quantum Cutting-Activated Electroluminescence of Ytterbium Ions

Xinyu Shen; Zhenyu Wang; Chengyuan Tang; Xiangtong Zhang; Bo Ram Lee; Xin Li; Daguang Li; Yu Zhang; Junhua Hu; Dan Zhao; Fujun Zhang; William W Yu; Bin Dong; Xue Bai

doi:10.1021/acs.nanolett.2c03679

Near-Infrared LEDs Based on Quantum Cutting-Activated Electroluminescence of Ytterbium Ions

Nano Lett. 2023 Jan 11;23(1):82-90. doi: 10.1021/acs.nanolett.2c03679. Epub 2022 Dec 21.

Authors

Xinyu Shen^{1

2}, Zhenyu Wang¹, Chengyuan Tang¹, Xiangtong Zhang¹, Bo Ram Lee², Xin Li¹, Daguang Li¹, Yu Zhang¹, Junhua Hu³, Dan Zhao¹, Fujun Zhang¹, William W Yu⁴, Bin Dong⁵, Xue Bai¹

Affiliations

¹ State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering, Jilin University, Changchun, Jilin 130012, China.
² Department of Physics, Pukyong National University, Busan 48513, Republic of Korea.
³ State Centre for International Cooperation on Designer Low-Carbon and Environmental Materials, School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
⁴ School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong 250100, China.
⁵ Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission, Key Laboratory of Photosensitive Materials and Devices of Liaoning Province, School of Physics and Materials Engineering, Dalian Nationalities University, Dalian, Liaoning 116600, China.

PMID: 36542057
DOI: 10.1021/acs.nanolett.2c03679

Abstract

Cesium lead halide perovskite nanocrystals (PNCs) exhibit promising prospects for application in optoelectronic devices. However, electroactivated near-infrared (NIR) PNC light-emitting diodes (LEDs) with emission peaks over 800 nm have not been achieved. Herein, we demonstrate the electroactivated NIR PNC LEDs based on Yb³⁺-doped CsPb(Cl_1-xBr_x)₃ PNCs with extraordinary high NIR photoluminescence quantum yields over 170%. The fabricated NIR LEDs possess an irradiance of 584.7 μW cm^-2, an EQE of 1.2%, and a turn-on voltage of 3.1 V. The ultrafast quantum cutting process from the PNC host to Yb³⁺ has been revealed as the main mechanism of electroluminescence (EL)-activated Yb³⁺ for the first time via exploring how the trend between the EL intensity of PNC and Yb³⁺ varies with different voltages along with the tendency of temperature- and doping-concentration-dependent PL and EL spectra. This work will extend the application of PNCs to optical communication, night-vision devices, and biomedical imaging.

Keywords: doping; light-emitting diodes; near-infrared; perovskite nanocrystal; quantum cutting.