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Breakthrough in Boron Research Enhances Optoelectronic Performance of Micro-LED Arrays

Strategic Insights

— 2 min read

Researchers at National Yang Ming Chiao Tung University have made a significant discovery in the field of boron research, revealing that boron ion implantation can improve the optoelectronic performance of micro-LED arrays for visible light communication (VLC). The study investigated the impact of pixel size and inter-pixel gap width on the performance of micro-LED arrays, with a total emitting area of 14,400 mm². The researchers found that decreasing gap widths led to a consistent increase in light output power and external quantum efficiency (EQE), attributed to reduced leakage currents and minimized non-radiative recombination losses.

Key Takeaways:

  • The study employed boron ion implantation to define pixel emission areas and achieve effective channel insulation, taking advantage of boron's small atomic radius and its ability to suppress electrical conductivity.
  • The micro-LED arrays had a total emitting area of 14,400 mm², with pixel sizes ranging from 5 mm to 10 mm and gap widths ranging from 2 mm to 8 mm.
  • The experimental results demonstrated a consistent increase in light output power and EQE with decreasing gap widths, attributed to reduced leakage currents and minimized non-radiative recombination losses.
  • The small size of boron ions allowed for precise electrical isolation between pixels without affecting emission properties.
  • In VLC applications, pixel size and gap width not only influenced light output power and EQE but also impacted bandwidth, full-width at half-maximum, and data transmission rates.
  • The 12 x 12 array with a 10 mm pixel size achieved the best VLC performance, with a bandwidth of 171.88 MHz at a current density of 347.2 A/cm².
  • Additional authors for this research include Chien-Chi Huang, Chien-Chung Lin, Ching-Ho Tien, Hao-Chung Kuo, Tae-Yeon Seong, and Ray-Hua Horng.

Statistics:

  • Total emitting area of micro-LED arrays: 14,400 mm²
  • Pixel sizes: 5 mm, 8 mm, and 10 mm
  • Gap widths: 2 mm, 4 mm, 6 mm, and 8 mm
  • External quantum efficiency (EQE): increased with decreasing gap widths
  • Bandwidth: 171.88 MHz at a current density of 347.2 A/cm²
  • Full-width at half-maximum: impacted by pixel size and gap width
  • Data transmission rates: influenced by pixel size and gap width

Sources:

  • Influence of pixel size and gap on the optoelectronic performance of micro-LED arrays for visible light communication using boron ion implantation. Discover Nano, 2025, 20(1): 1-12.
  • National Yang Ming Chiao Tung University, Institute of Electronics.
  • Po-Chiao Wang, Institute of Electronics, National Yang Ming Chiao Tung University.

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