https://scholar.dgist.ac.kr/handle/20.500.11750/10136 2026-09-20T15:37:06Z https://scholar.dgist.ac.kr/handle/20.500.11750/60703 Title: 균질막 스크린 프린팅장치 Author(s): 이수근; 최병대; 윤상훈 Abstract: 본 발명에 따르면, 기재를 고정하기 위한 진공척이 구비되는 프린팅 스테이지; 스크린 제판을 고정할 수 있는 스크린 설치부; 및 상기 스크린 제판 표면에 프린팅액을 스퀴지하는 스퀴지 어셈블리;를 포함하고, 상기 스퀴지 어셈블리는, 스크린 제판에 프린팅액이 균일하게 펴지도록 하는 스퀴지 바; 상기 스퀴지 바가 탑재된 상태로 프린팅 스테이지 상부를 슬라이드 왕복 구동되도록 하는 슬라이더를 구비하는 슬라이드 구동부; 상기 슬라이더를 수동 조작하기 위한 작업자의 조작력을 전달받도록 적어도 2개의 레버를 스퀴지 바 양측 상부위치에 설치되도록 하는 레버 조작부; 및 상기 슬라이더 상에 설치되어 상기 스퀴지 바의 접촉압력을 조절하되, 상기 레버 조작부에 의해 압력조절 및 좌우 밸런스 조절되도록 하는 압력조절부;를 포함하는 것을 특징으로 하는 균질막 스크린 프린팅장치가 제공될 수 있다. https://scholar.dgist.ac.kr/handle/20.500.11750/60612 Title: Water-Soluble Self-Assembled Radical Nanoparticles for Deep-Red Fluorescence-Guided Type I/II Photodynamic Therapy Author(s): Li, Zhuo; Dang, Zetao; Cho, Eunkyung; Sun, Qi; Li, Xinru; Li, Yongming; Brédas, Jean-Luc; Coropceanu, Veaceslav; Zhu, Shoujun; Li, Feng Abstract: Organic luminescent radicals with efficient doublet emission can directly transfer electrons and energy to oxygen, enabling fluorescence-guided photodynamic therapy. However, their water insolubility and unclear oxygen interaction mechanisms limit their application. To address these challenges, we synthesized an amphiphilic organic radical (TTM-2PyPh) that forms self-assembled water-soluble nanoparticles (TTM-2PyPh_SA@NPs) with deep-red emission, serving as Type-I/II photosensitizers. Quantum chemistry calculations confirm an efficient electron transfer process between the radicals and oxygen. These nanoparticles self-assemble in vivo, target tumors, and produce reactive oxygen species more effectively than core-shell nanoparticles (TTM-2Py_CS@NPs), chlorin e6, and methylene blue. Additionally, TTM-2PyPh_SA@NPs demonstrate superior tumor eradication in vivo. This work advances the development of novel water-soluble radical-based photosensitizers for enhanced photodynamic therapy. 2026-05-31T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60597 Title: Redox-Active Ligand-Stabilized Lithium Iron Phosphate Nanoparticles for High-Performance Lithium-Ion Battery Cathode with High Capacities and Long-Term Stability Author(s): Bok, Jiwon; Ahn, Jeongyeon; Park, Bogeun; Nam, Donghyeon; Ryu, Hee Seung; Lee, Uijun; Jang, Jaeyeong; Chang, Shihyun; Choi, Sungha; Kwon, Minseong; Chang, Woojae; Ryu, Du Yeol; Kim, Daegun; Lim, Hee-Dae; Kim, Byung-Hyun; Ko, Yongmin; Cho, Jinhan Abstract: Developing cathodes that simultaneously deliver high capacity, superior rate capability, and long-term cycling stability remains a major challenge in lithium-ion batteries. Here, we report a high-performance textile cathode constructed via interfacial interaction-mediated assembly of high-energy porphyrin (PP) ligand-stabilized LiFePO4 nanoparticles (LFP NPs). For this, 19 nm LFP NPs with olivine-type intercalation mechanism were covalently integrated with amine-functionalized PP to enable multi-electron redox activity, followed by encapsulation with multi-walled carbon nanotube (MWCNT) multilayers. Subsequent thermal annealing transformed the MWCNT layers into a covalently cross-linked conductive network. As a result, the textile cathode delivers an unprecedented specific capacity of similar to 260 mAh g(-1) at similar to 0.1 C, excellent rate capability, and retains over 93% of its initial capacity after 2,000 cycles at 1 C with nearly 100% Coulombic efficiency. This work highlights interfacial interaction-mediated ligand assembly as a powerful strategy for next-generation high-capacity and durable cathodes. 2026-06-30T15:00:00Z https://scholar.dgist.ac.kr/handle/20.500.11750/60552 Title: Greener Colloidal Ink Engineering and Local Solidification Control for High-Performance Slot-Die Coated Perovskite Solar Modules Author(s): Sangale, Sushil Shivaji; Barma, Sunil Vinod; Kwon, Sung-Nam; Sung, Shi-Joon; Kim, Dae-Hwan; Byeok Jo, Sae; Na, Seok-In Abstract: Perovskite solar cells (PSCs) have emerged as leading candidates for next-generation photovoltaics; however, translating laboratory-scale efficiencies to industrial production remains limited by key challenges such as achieving high-quality film and addressing solvent toxicity. To overcome these limitations, we formulate colloidal ink by incorporating iodobenzene (Iodo) as an environmentally sustainable additive into a DMSO-based system, enabling scalable film fabrication via slot-die coating. It is found that Iodo-based additives enhance wettability, facilitate the formation of larger colloidal particles, and enable controlled solidification through solvent evaporation kinetics. Specifically, the inclusion of Iodo modulates colloidal size and evaporation behavior, which in turn reduces the effective nucleation barrier and promotes directional grain growth. This leads to the formation of dense, uniform films with improved crystallinity and minimal defects. Devices fabricated using Iodo-based ink achieved an efficiency of up to 22.3% (the highest reported efficiency in a highly toxic DMF-free system), encapsulated devices retaining 85% of their initial value after 1200 h of maximum power point tracking (MPPT) and 77% after 8400 h (unencapsulated devices stored in the dark), demonstrating excellent operational and long-term stability. Furthermore, the DMF-free, DMSO-based ink shows excellent scalability, achieving efficiencies of 21% and 19.5% for 2.7 and 31.50 cm2 modules, respectively. 2026-03-31T15:00:00Z