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Showing 1–6 of 6 results
Advanced filters: Author: Hobeom Kim Clear advanced filters

  • High-concentration lithium polysulfides in lean electrolyte lithium–sulfur batteries hinder stable cycling. Here, authors introduce a reversible calcium additive that regulates polysulfides chemistry and catalyzes sulfur redox reactions, improving energy density with stable cycling.

    • Hannah Cho
    • Jinkwan Jung
    • Hee-Tak Kim
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • Defects in perovskite materials are detrimental to their carrier dynamics and structural stability. Here, the authors incorporate 6H polytype perovskite into bulk to reduce defects and improve structural integrity, realizing efficient solar cells and modules with long-term stability.

    • Hobeom Kim
    • So-Min Yoo
    • Mohammad K. Nazeeruddin
    ResearchOpen Access
    Nature Communications
    Volume: 15, P: 1-11

  • The development of new electrolyte systems is needed to optimize performance in lithium-sulfur batteries. Here the authors employ anions with high donor numbers in electrolytes to prevent passivation of the cathode surface, thereby improving sulfur utilization and energy density in a lithium-sulfur cell.

    • Hyunwon Chu
    • Hyungjun Noh
    • Hee-Tak Kim
    ResearchOpen Access
    Nature Communications
    Volume: 10, P: 1-12

  • A summary of recent advances in the near-infrared light-emitting diodes that are fabricated by solution-processed means, with coverage of devices based on organic semiconductors, halide perovskites and colloidal quantum dots.

    • Maria Vasilopoulou
    • Azhar Fakharuddin
    • Edward H. Sargent
    Reviews
    Nature Photonics
    Volume: 15, P: 656-669

  • We report a new anode material that has multifunction of both an anode and a hole injection layer (HIL) as a single layer. Our anode has easy work function tunability up to 5.8 eV and thus makes ohmic contact without any HIL. We applied our anodes to simplified organic light-emitting diodes, resulting in high efficiency (62% ph el−1 for single and 88% ph el−1 for tandem). Our anode showed a similar tendency in simplified perovskite light-emitting diodes. We also demonstrated large-area flexible lightings using our anodes. Our results provide a significant step toward the next generation of high-performance simplified light-emitting diodes.

    • Su-Hun Jeong
    • Seong-Hoon Woo
    • Tae-Woo Lee
    ResearchOpen Access
    NPG Asia Materials
    Volume: 9, P: e411