1 550 nm InP/In0.53Ga0.47As laser power converters
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1.National Key Laboratory of Infrared Science and Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China;2.University of Chinese Academy of Sciences, Beijing 100049, China;3.National Key Laboratory of Photovoltaic Science and Technology, Institute of Optoelectronics, Fudan University, Shanghai 200433, China

Clc Number:

TN304

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Supported by the National Key RD Program of China (2022YFA1404701, 2017YFA0205800), the National Natural Science Foundation of China (62075231), the Shanghai Science and Technology Committee (20JC1414603)

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    Abstract:

    We present the design, simulation, and experimental validation of an InP/In0.53Ga0.47As laser power converter for the wavelength of 1 550 nm. By optimizing the thickness of the absorption layer and adopting a dual-layer anti-reflective structure (SiO2 and SiN), the device achieves an absorptance of 96% under 1 550 nm laser irradiation, demonstrating insensitivity to angle variation and robust to wavelength shifts. The experimental results are in good agreement with the theoretical calculation results. The external quantum efficiency (EQE) reaches 92%. Under a laser power density of 47 mW/cm2, the cell’s conversion efficiency reaches 23%. Theoretical analysis reveals that the main reason for the experimental results being lower than the theoretical predicted values is that the sample devices have a relatively high series resistance and a relatively low parallel resistance. Further refinement of device processing is needed to reduce series and shunt resistances, thereby enhancing the overall efficiency of the laser photovoltaic cell. In addition, this study delves into the impact of cell area on the photovoltaic performance, providing optimization directions for the miniaturization of laser photovoltaic cells.

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ZHANG Zong-Kun, SUN Yan, HAO Jia-Ming, DAI Ning.1 550 nm InP/In0.53Ga0.47As laser power converters[J]. Journal of Infrared and Millimeter Waves,2025,44(4):477~485

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History
  • Received:November 03,2024
  • Revised:May 15,2025
  • Adopted:December 23,2024
  • Online: May 12,2025
  • Published:
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