Young Yong Kim

Structure‐Guided Balancing of Ambipolar Transport Enables Symmetric Switching in Heterojunction Bilayer Organic Transistor Inverters

Sohyun Choi, Young Yong Kim, Ji Ho Youk, Hoichang Yang

ABSTRACT High inverter performance in ambipolar organic electronics requires balanced channel strengths rather than maximized single‐carrier mobility. Here, we demonstrate symmetric switching through balanced ambipolar transport in vertically stacked pentacene/ N , N ′‐ditridecylperylene‐3,4,9,10‐tetracarboxylic diimide (PTCDI‐C 13 ) heterojunction bilayers (HJBs) fabricated …

kr (code pays fourni par la source)

Ion‐Exchange‐Driven Ternary Organic Neuromorphic Devices with High Efficiency and Stability

Sungmin Lee, Vivek Pratap Singh, Hyeonryul Lee, Young Yong Kim et autres

ABSTRACT Organic neuromorphic platforms based on top‐gate ionic‐liquid architectures rely on precise electrochemical doping at low operating voltages; however, intrinsically unfavorable polymer‐ion interfaces often lead to unstable doping, elevated operating voltages, and poor device‐to‐device uniformity. Herein, we present a solution‐processed ternary organic …

kr, in, cn (code pays fourni par la source)

Morphology-Diversified Sn Growth for Aqueous Acidic Batteries

Young‐Hoon Lee, Geumbi Na, Eunji Kwon, Young Yong Kim et autres

Abstract Aqueous acidic batteries utilizing corrosion-resistant Sn metal anodes have emerged as promising candidates for safe energy storage systems. However, uncontrolled dendritic growth under high-rate operation remains a major obstacle. Here we showed that artificial layers acting solely as a physical barrier …

kr, jp, us (code pays fourni par la source)

Atomically Dispersed Ni Site Catalysts Accelerating Sluggish Sulfur Redox Kinetics in Nonaqueous Zn‐S Batteries

Junhyuk Ji, Dong-Woo Kim, 문누리, Daehwan Kim et autres

ABSTRACT Aqueous zinc‐ion batteries are hindered by parasitic water‐induced side reactions and a narrow electrochemical stability window. Transitioning to nonaqueous electrolytes offers a solution to these challenges, yet sluggish redox kinetics and poor sulfur conversion efficiency remain significant obstacles for practical Zn─S …

kr (code pays fourni par la source)

Morphology Control of D‐A‐D and D‐A‐A Type Donor Polymers via Thiophene‐π‐Siloxane Spacer Engineering to Produce Scalable High‐Performance Organic Photovoltaics

Priyanka Yadav, Hyerin Kim, Bo Hyeon Cho, Jin Soo Yoo et autres

ABSTRACT One of the major challenges for the commercial application of high performance organic solar cells (OSCs) is scaling them from small‐area devices to large‐area submodules (LA‐SMs). Here, we report the design and synthesis of two new π‐conjugated spacer‐functionalized donor polymers (SF‐DPs), …

kr, Soudan (code pays fourni par la source)

Stoichiometry- and lattice-tunable MoNx as a novel electrode platform for ferroelectric Hf0.5Zr0.5O2 capacitors

Hyojun Choi, Ju Yong Park, Jaewook Lee, Hyun Woo Jeong et autres

Ferroelectricity in (Hf,Zr)O2 thin films is highly sensitive to bottom-electrode chemistry, as interfacial redox reactions during atomic layer deposition (ALD) and subsequent annealing can generate defective interlayers and alter oxygen-vacancy distributions. Here, we propose a stoichiometry- and lattice-tunable molybdenum nitride (MoNx) electrode …

kr (code pays fourni par la source)

Dual Impact of Long‐Lived Localized Carriers Induced by Restricted Hole Transfer in Organic Photovoltaics and Photocatalytic Hydrogen Evolution

Gayoung Ham, Sanghyeok An, Wooteak Jung, Hyun Min Kwon et autres

ABSTRACT Organic semiconductors are key photoactive materials for solar energy conversion, including organic photovoltaics (OPVs) and photocatalytic hydrogen evolution. Here, we uncover a paradox: materials optimized for efficient charge extraction in OPVs exhibit different behavior when used as photocatalysts in aqueous colloids. …

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Turning instability into functionality: Stoichiometry-and moisture-tuned reversible multichromism in Ethylammonium perovskites

Soohyung Park, Aelim Ha, Seunghwan Kim, Kitae Kim et autres

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Defect-engineering driven imprint enables low-power and high-endurance of antiferroelectric Hf0.3Zr0.7O2 ultra-thin films for nonvolatile memories

Hyun Woo Jeong, Yong Hyeon Cho, Jaewook Lee, Heejin Hong et autres

kr (code pays fourni par la source)

Tailoring non-fullerene acceptors to enhance molecular ordering in inverted bilayer organic solar cells

Deyang Xie, Shilin Chen, Ming Wang, Lanlan Zhang et autres

Transfer-printed inverted bilayer OSCs employing BTP-eC9 achieve enhanced performance and stability through a smooth film that extends carrier lifetime, improves charge extraction, establishing NFA morphology optimization as key to efficient devices.

cn, kr (code pays fourni par la source)

Defect Migration in Supercrystalline Nanocomposites

Dmitry A. Lapkin, Cong Ming Yan, Emre Gürsoy, Hadas Sternlicht et autres

High Resolution Image Download MS PowerPoint Slide Supercrystalline nanocomposites (SCNCs) are nanostructured hybrid materials with a variety of unique functional properties. Given their periodically arranged building blocks, they also offer interesting parallels with crystalline materials. They can be processed in multiple forms …

de, nl, gb, us, ua, cn (code pays fourni par la source)

A Paradigm Shift Toward Quasi‐Thermodynamically Stable Bulk Heterojunction Morphology Enabled by Controlled Crystallization Kinetics of High Quadrupole Moment Nonfullerene Acceptors

Chihyung Lee, Minwoo Nam, Heesung Jeong, Cheolho Lim et autres

ABSTRACT Recent advances in high quadrupole moment () non‐fullerene acceptors (NFAs) have improved exciton diffusion and charge separation in organic photovoltaics (OPVs). However, conventional bulk heterojunctions (BHJs) with a balanced donor‐to‐acceptor ratio often exhibit amorphous mixed domains, introducing energetic disorder and limiting …

kr, cn (code pays fourni par la source)