https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/173 Sat, 04 Jul 2026 01:57:06 GMT 2026-07-04T01:57:06Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212893 Title: Recent advances in photodiode-type organic photodetectors: From polymer design to applications Authors: Jee, Min Hun; Kim, Myeong In; Kang, Min Gyu; Lee, Sumin; Jung, In Hwan; Woo, Han Young Abstract: Organic photodetectors (OPDs) offer intrinsic advantages over their inorganic counterparts, including<br /> mechanical flexibility, lightweight and deformable device architectures compatible with wearable and stretchable electionics, and broad tunability of optoelectronic properties enabled by molecular-level de-sign. These feanres position OPDs as versatile and complementary photodetection platforms for both broadband and qolor-selective light sensing. This review presents a focused overview of polymer-based OPDs, with partiqular emphasis on photodiode-type devices based on p-n heterojunction (HJ) and photo-multiplication (PM)-type OPDs, which have experienced especially rapid progress in recent years, achiev-ing substantial improvements in sensitivity, noise characteristics, and response speed. We first summarize the fundamental operating principles and key figures of merit governing both static and dynamic OPD performance. For HJ-type OPDs, recent advances in molecular design strategies enabling visible, near-infrared (NIR), and short-wave infrared (SWIR) photodetection are discussed, with particular attention to polymer modkication approaches that realize color-selective absorption and improved device perfor-mance. We then review recent developments in high-gain PM-type OPDs, focusing on polymer host de-sign and charge-apping modulation strategies for PM. Finally, current challenges and future perspectives for next-generation OPDs are discussed, with an outlook toward their integration into advanced optoelec-<br /> tronic systems. (c) 2026 Elsevier Ltd. All rights are reserved, including those for text and data mining. Al training, and<br /> similar technologies. Wed, 01 Jul 2026 00:00:00 GMT https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212893 2026-07-01T00:00:00Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212731 Title: Control over seed framework enables oriented 3D nanocrystalline perovskite films for light-emitting diodes Authors: Jeong, Jinju; Park, Sang Wook; Kim, Jaehun; Lee, Dong Gyu; Ahn, Hyungju; Lee, Tae Kyung; Lee, Seungjin Abstract: Crystallographic features strongly influence the luminescence and charge-transport properties of metal halide perovskite films; however, uncontrolled crystallization remains a major obstacle to developing efficient and stable perovskite light-emitting diodes (PeLEDs). Here we introduce a Lewis acid–base passivation strategy that modulates the formation of initial seed structures during film growth, enabling control over the crystallographic dimensionality, orientation, defect density, and grain size of the resulting films. By systematically investigating ligand-seed interactions, we demonstrate that careful tuning of ligand protophilicity induces additional coordination to the precursor species, thereby stabilizing desired seed configurations and guiding subsequent crystal growth. This strategy yields preferentially oriented and phase-pure three-dimensional (3D) nanocrystalline films while effectively suppressing defect-assisted nonradiative recombination through surface passivation. As a result, the films exhibit a photoluminescence quantum yield of 76%, a hole mobility of 2.22 × 10–4 cm2 V–1 s–1, and a reduced trap density of 3.09 × 1016 cm–3, along with enhanced thermal phase stability at 100 °C. PeLEDs based on these films achieve a maximum external quantum efficiency of 22.1% with minimal efficiency roll-off, maintaining an external quantum efficiency above 20% at 10,000 cd m–2. Wed, 01 Jul 2026 00:00:00 GMT https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212731 2026-07-01T00:00:00Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212277 Title: A Diels-Alder-based rGO anchoring binder for robust conductive networks in SiOx anodes Authors: Kim, Sucheol; Choi, Minwoo; Park, Changyong; Do, Kwanghyun; Song, Chiho; Gohng, Sangwon; Bansal, Neetu; Salunkhe, Rahul R.; Ahn, Heejoon Abstract: Silicon oxide (SiOx, 0 < x < 2) is a promising anode material for high-energy lithium-ion batteries; however, its practical application is limited by the instability of conductive networks caused by aggregation of hydrophobic conductive additives during cycling. Here, we present a binder-centered strategy that stabilizes conductive pathways by uniformly integrating reduced graphene oxide (rGO) within a poly(acrylic acid) (PAA)-based binder. Furfurylamine-functionalized PAA (FPAA) was covalently cross-linked with 6-amino-4-hydroxy-2-naphthalenesulfonic acid–functionalized rGO (AHNSrGO) via Diels–Alder chemistry, forming a homogeneously dispersed rGO network anchored in the binder matrix. The resulting rGO-integrated binder effectively redistributes hydrophobic Super P through π–π interactions while maintaining strong adhesion to hydrophilic SiOx particles via hydrogen bonding, thereby suppressing conductive-additive aggregation during long-term cycling. Consequently, SiOx electrodes employing this FPAA–AHNSrGO (FG) binder exhibit enhanced adhesion strength, accelerated electrochemical utilization of SiOx, reduced interfacial resistance, and significantly improved rate capability and cycling stability compared to conventional PAA-based electrodes. Notably, these advantages are more pronounced under high mass-loading and low conductive-additive conditions and are retained in full-cell configurations paired with NCM811 cathodes. This work demonstrates that binder-level rGO integration is an effective and scalable approach to preserving conductive-network integrity, enabling high-energy and long-life silicon-based lithium-ion batteries. © 2026 Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Mon, 01 Jun 2026 00:00:00 GMT https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/212277 2026-06-01T00:00:00Z https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/213066 Title: Importance of Temperature-Dependent Formation of the Solid-Electrolyte Interphase for Stable Lithium Metal Batteries with Elastomeric Electrolytes Authors: Seong, Hyeonseok; Lee, Dongkyu; Son, Junsu; Park, Jinseok; Kim, Boguen; Cho, Yubhin; Choi, Nam-Soon; Lee, Tae Kyung; Lee, Wonho; Kim, Bumjoon J. Abstract: The construction of a robust and Li+ conductive solid electrolyte interphase (SEI) is crucial for stable cycling in lithium metal batteries (LMBs). Here, we demonstrate that a formation cycle protocol (i.e., temperature) is critical in determining the SEI properties and, thus, the performance of LMBs with elastomeric electrolytes at different operation temperatures, including low temperature conditions. The SEI generated at low temperature (0°C) significantly reduces interfacial resistance by approximately ten times compared to that formed at 25°C, facilitating efficient Li+ transport and uniform Li deposition. As a result, Li||LiNi0.8Co0.1Mn0.1O2 cells formation-cycled at 0°C retain 89.7% of their initial capacity after 100 cycles at −10°C. They also exhibit stable performance under ambient conditions (25°C). We reveal that superior LMB performance formation-cycled at 0°C is due to the fluorinated polymer-induced LiF as well as highly Li+ conductive species such as Li2CO3/Li3N, which is confirmed through combined experiments and multiscale molecular simulations. These results highlight the important roles of fluorinated elastomeric electrolytes and formation cycle protocol in producing a robust, highly Li+ conductive SEI, thereby enhancing the cycling performance of LMBs across a wide temperature range. Mon, 01 Jun 2026 00:00:00 GMT https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/213066 2026-06-01T00:00:00Z