Energy Transfer Engineering Enabled Efficient and Broad-Band Near-Infrared Emission
Source abstract
Abstract
Near-infrared (NIR) light is crucial for medical diagnostics, industrial inspection, and military applications, but achieving both broad-band and efficient NIR luminescence remains challenging. Here, we propose an energy transfer strategy in low-dimensional halides to enable efficient NIR emission, exemplified by zero-dimensional Cs 4 CaI 6:Yb 2+,Sm 2+ . The optimized Cs 4 CaI 6:1%Yb,3%Sm single crystals exhibit high internal and external quantum efficiencies of 73.3% and 47.8% in the NIR region, respectively, resulting from effective Yb 2+ →Sm 2+ energy transfer. When integrated with a commercial blue-light-emitting chip, a record NIR photoelectric conversion efficiency of 31.0% is achieved. Moreover, Cs 4 CaI 6:1%Yb,3%Sm exhibits an exceptional scintillation efficiency of 52,000 photons/MeV, representing a state-of-the-art performance among NIR scintillators. Its bright NIR scintillation enables clear imaging with polydimethylsiloxane-based scintillation screens, even under ambient light conditions, paving the way for portable outdoor X-ray imaging. This work provides an effective approach to achieve NIR emission for light-emitting diodes and scintillation applications.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Semiconductor Detectors and Materials · Gas Sensing Nanomaterials and Sensors · Spectroscopy and Laser Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Functional Crystals and Devices, Shanghai Institute of Ceramics, Chinese Academy of sciences, 585 He-shuo Road, Shanghai 201899, P.R. China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
School of Microelectronics, Shanghai University, 20 Chengzhong Road, Shanghai 201800, China
Institute of Physics of the Czech Academy of Sciences
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, 7 Brehova, Prague 11519, Czech Republic
Faculty of Materials Science and Engineering, Key Laboratory of Advanced Materials of Yunnan Province
Kunming University of Science and Technology
Funding
Natural Science Foundation of Shanghai Municipality · National Key Research and Development Program of China · Ministerstvo ?kolstv?, Ml?de?e a Telov?chovy · National Natural Science Foundation of China · Chinese Academy of Sciences
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