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A short overview of the lead iodide residue impact and regulation strategies in perovskite solar cells

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j.urnal of Energy Chemistry 2024年第3期90卷 504-510,I0012页

作者： Eng Liang lim Zhanhua Wei Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information DisplaysCollege of Materials Science and EngineeringHuaqiao UniversityXiamen 361021FujianChina

Lead iodide(PbI2) is a vital raw material for preparing perovskite solar cells(PSCs),and it not only takes part in forming the light absorption layer but also remains in the grain boundary as a passivator.In other words,the PbI2 content in the precursor and as formed film will affect the efficiency and stability of the PSCs.With moderate residual PbI2,it passivates the bulk/surface defects of perovskite,reduces the interfacial recombination,promotes the perovskite stability,minimizes the device hysteresis,and so on.Deficient PbI2 residue will reduce the interfacial passivation effect and device performance.In addition to facilitating the non-radiative recombination,over PbI2 residue can also lead to electronic insulation in the grain boundary and deteriorate the device performance.However,the impact and regulation of PbI2 residue on the device performance and stability is still not fully understood.Herein,a comprehensive and detailed review is presented by discussing the PbI2 residue impact and its regulation strategies(i.e., elimination,facilitation and conversion of the residue PbI2) to manipulate the PbI2 content,distribution and forms.Finally,we also show future outlooks in this field,with an aim to help further the progression of high-efficiency and stable PSCs.

关键词： Lead iodide Residue Regulation Perovskite solar cells Efficiency Stability

Highly Elastic,Bioresorbable Polymeric Materials for Stretchable,Transient Electronic Systems

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Nano-Micro Letters 2024年第6期16卷 1-13页

作者： j.ong‑Woong Shin Dong‑j. Kim Tae‑Min j.ng Won Bae Han j.ong Hoon Lee Gwan‑j.n Ko Seung Min Yang Kaveti Raj.ram Sungkeun Han Heeseok Kang j.n Hyeon lim Chan‑Hwi Eom Amay j.Bandodkar Hanul Min Suk‑Won Hwang KU‑KIST Graduate School of Converging Science and Technology Korea University145 Anam‑roSeongbuk‑guSeoul 02841Republic of Korea SK Hynix 2091Gyeongchung‑daeroBubal‑eupIcheon‑siGyeonggi‑do 17336Republic of Korea Hanwha Systems Co. Ltd.188Pangyoyeok‑roBundang‑guSeongnam‑siGyeonggi‑do 13524Republic of Korea Department of Electrical and Computer Engineering North Carolina State UniversityRaleighNC 27606USA Center for Advanced Self‑Powered Systems of Integrated Sensors and Technologies(ASSIST) North Carolina State UniversityRaleighNC 27606USA Department of Integrative Energy Engineering Korea University145 Anam‑roSeongbuk‑guSeoul 02841Republic of Korea Biomaterials Research Center Korea Institute of Science and Technology(KIST)5 Hwarang‑ro 14‑gilSeongbuk‑guSeoul 02792Republic of Korea Semiconductor R&D Center Samsung Electronics Co.Ltd.Hwaseong‑siGyeonggi‑do 18448Republic of Korea Center for Advanced Biomolecular Recognition Biomedical Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea

Substrates or encapsulants in soft and stretchable formats are key components for transient,bioresorbable electronic systems;however,elastomeric polymers with desired mechanical and biochemical properties are very limited compared to nontransient counterparts.Here,we introduce a bioresorbable elastomer,poly(glycolide-co-ε-caprolactone)(PGCL),that contains excellent material properties including high elongation-at-break(<1300%),resilience and toughness,and tunable dissolution behaviors.Exploitation of PGCLs as polymer matrices,in combination with conducing polymers,yields stretchable,conductive composites for degradable interconnects,sensors,and actuators,which can reliably function under external strains.Integration of device components with wireless modules demonstrates elastic,transient electronic suture system with on-demand drug delivery for rapid recovery of postsurgical wounds in soft,time-dynamic tissues.

关键词： Biodegradable elastomer Conductive polymer composites Biomedical device Transient electronics

长期类脂质渐进性坏死皮损区鳞状细胞癌发病率的增加

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世界核心医学期刊文摘（皮肤病学分册） 2006年第11期2卷 20-20页

作者： lim C. Tschuchnigg M. lim j. 任建文 Davies Campbell de Lambert 2 Leeds Street Rhodes NSW 2138 Australia

Background: Squamous cell carcinoma in an area of chronic ulceration is a well-documented phenomenon. However, its occurrence arising de novo in an area of necrobiosis lipoidica is rare. Method: We report a case in a 53-year-old female who presented with a 2 month history of an erythematous nodule occurring in a plaque of necrobiosis lipoidica on the medical aspect of the right lower leg. She had a background of poorly controlled Type 1 diabetes. Results: Histopathological findings revealed a well-differentiated squamous cell carcinoma overlying an area of necrobiosis lipoidica. Treatment was by excision and split-thickness skin graft. Conclusion: Clinicians should be aware of malignant transformation within a plaque of necrobiosis lipoidica. Early detection will allow conservative treatment.

关键词：皮损区鳞状细胞癌右小腿早期检查慢性溃疡组织病理学临床医师

Prediction of Minimum Spouting Velocity at Elevated Pressures and Temperatures

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Petroleum Science 2006年第2期3卷 81-84页

作者： Wei Weisheng Bao Xiaoj.n lim C. j. Bi H. T. Key Laboratory of Catalys＆ China National Petroleum Corporation China University of Petroleum Beijing 102249 China Department of Chemical and Biological Engineering University of British Columbia Vancouver V6T 1Z4 Canada

Minimum spouting velocity （Ums） is one of the most important flow characteristics for proper design and operation of spouted bed reactors. Many correlations for Ums have been published since spouted bed technology was initiated in 1955. In this paper, a new correlation is developed for Ums based on 767 published experimental data covering both high pressure and high temperature conditions. The calculated and the measured results of Ums are in better agreement than other published correlations.

关键词： Spouted bed minimum spouting velocity high temperature high pressure

Outcomes of a non-randomised audit of single pigtail suture stents in urolithiasis management of Asian patients in Singapore

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Asian j.urnal of Urology 2024年第2期11卷 324-330页

作者： Ee j.an lim Zhen Wei Choo Reshma Mangat Pradeep Durai Sarvaj.t Biligere Yiquan Tan Loh Hin Yeung Marcus Nicole Andrea Seet Li Ting Chin Tiong Heng Stefania Ferreti Vineet Gauhar Urology Department Singapore General HospitalSingapore Urology Department Tan Tock Seng HospitalSingapore Urology Department Ng Teng Fong HospitalSingapore Urology Department Azienda Ospedaliera-Uiversitaria(Hospital and University of Parma)ParmaItaly

Obj.ctive:Double-j.Dj.ureteric stents are commonly placed perioperatively for semirigid or flexible ureteroscopic renal surgery.It is believed that lesser stent material within the bladder mitigates stent-related symptoms.This study aimed to evaluate the j.Fil ureteral stent,a single pigtail suture stent compared with conventional Dj.stent in relation to stent symptoms in an Asian population undergoing ureterorenal intervention.Methods:Based on internal audit committee recommendation approval,the records of 50 patients retrieved,available data of 41 patients who were prospectively enrolled into two groups(Group 1[j.Fil stent group],n=21 and Group 2[Dj.stent group],n=20)between August 2020 to j.nuary 2021,were analysed.Parameters compared were nature of procedure,stone location and size,ease of deployment or removal,and complications.A modified universal stent symptom questionnaire was used to assess morbidity of stent symptoms within 48 h of insertion and at removal.Results:Both groups had similar median age,distribution in male to female ratio,and stone size.The overall median universal stent symptom questionnaire score at insertion was similar for bladder pain,flank or loin pain,and quality of life between Group 1 and 2;however,at removal Group 1 fared significantly better than Group 2,especially for flank or loin pain and pain at voiding.Both groups had similar ease in insertion with no hospital readmissions.Conclusion:Our audit favoured the single pigtail suture stent in Asian ureters in mitigating stent-related issues.It showed a good safety profile with easy deployment and removal.It promises a new standard in stenting.

关键词： Stent Ureteroscopy Pigtail suture stent Asianpatient Flexible ureteroscopic renal surgery

Performance of pulsed plasma thruster at low discharge energy

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Plasma Science and Technology 2024年第4期26卷 122-132页

作者：李鸿俊林泽豪胡浩俊吴文东陈爱虹杜德扬 Department of Physics Faculty of ScienceUniversity of MalayaKuala Lumpur 50603Malaysia Faculty of Engineering The University of Nottingham Malaysia CampusSemenyih 43500Malaysia Faculty of Engineering Multimedia UniversityCyberjaya 63100Malaysia

As the size of satellites scales down, low-power and compact propulsion systems such as the pulsed plasma thruster(PPT) are needed for stabilizing these miniature satellites in orbit. Most PPT systems are operated at 2 j.or more of discharge energy. In this work, the performance of a PPT with a side-fed, tongue-flared electrode configuration operated within a lower discharge energy range of 0.5-2.5 j.has been investigated. Ablation and charring of the polytetrafluoroethylene propellant surface were analyzed through field-effect scanning electron microscopy imaging and energy-dispersive X-ray spectroscopy. When the discharge energy fell below 2 j. inconsistencies occurred in the specific impulse and the thrust efficiency due to the measurement of the low mass bit. At energy ≥2 j. the performance parameters are compared with other PPT systems of similar configuration and discussed in depth.

关键词： pulsed plasma thruster low discharge energy performance parameters

Surface Waves in a Relativistic Plasma Stream Propagating in a Duct: Kinetic Theory

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j.urnal of Modern Physics 2022年第7期13卷 1065-1079页

作者： Hee j. Lee Young Kyung lim Kyunggi-do Namyangj.-si Hwado-eup Biryong-ro 321 South Korea Department of Radiation Oncology National Cancer Center Goyang South Korea

Dispersion relation of surface waves generated by a relativistic plasma stream in an infinite duct surrounded by vacuum is derived by means of relativistic Vlasov equation. The kinematic boundary condition imposed on the distribution function, the specular reflection conditions on the four sides of duct, can be satisfied by placing infinite number of fictitious surface charge sheets spaced by the duct widths. By placing appropriate fictitious surface charge sheets one can effectively deal with the extended electric field introduced in the Vlasov equation and treat kinetically the surface waves in semi-infinite, slab, and duct plasmas on equal ground. The relativistic duct dispersion relation is compared with the earlier non-relativistic surface wave dispersion relation.

关键词： Surface Wave Relativistic Plasma Duct Slab

Leading Approaches to Vascularize Kidney Constructs in Tissue Engineering

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Engineering 2022年第12期19卷 117-127页

作者： Diana S.lim j.hn D.j.ckson Anthony Atala j.mes j.Yoo Wake Forest Institute for Regenerative Medicine Wake Forest University School of MedicineMedical Center BoulevardNC 27157USA

There is an unprecedented need for new treatments for renal failure,as the incidence of this disease is increasing disproportionately to advancements in therapies.Current treatments are limited by the availability of viable organs,for which there is a worldwide lack.These treatment modalities also require a substantial amount of infrastructure,significantly limiting the access to care in most countries.Kidney tissue engineering approaches promise to develop alternative solutions that address many of the inadequacies in current care.Although many advancements have been made—primarily in the past decade—in biofabrication and whole-organ tissue engineering,many challenges remain.One maj.r hindrance to the progress of current tissue engineering approaches is establishing successful vascularization of developed engineered tissue constructs.This review focuses on the recent advancements that address the vascular challenge,including the biofabrication of vasculature,whole-organ engineering through decellularization and recellularization approaches,microscale organogenesis,and vascularization using organoids in the context of kidney tissue engineering.We also highlight the specific challenges that remain in developing successful strategies capable of clinical translation.

关键词： Kidney Vascularization Tissue engineering Biofabrication Organoids

Can two-dimensional graphdiyne-based materials be novel materials for perovskite solar cell applications?

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Materials Futures 2023年第2期2卷 142-151页

Two-dimensional(2D)graphdiyne(GDY)-based materials have attracted attention in the solar cell research community owing to their unique physicochemical properties and hydrophobic nature which can serve as moisture resistance from the surrounding medium.Benefiting from these,the performance and stability ofperovskite solar cells(PSCs)can be greatly improved via the addition of 2D GDY-based materials.This mini-review summarizes the recent development of 2D GDY-based materials for PSC application.The roles of 2D GDY-based materials,such as hole transporting material,electron transporting material,dopant material in perovskite film and interfacial layer,are discussed in detail.Moreover,we provide future perspectives in this field,aiming to help further progress efficient and stable 2D GDY-based materials in PSCs.

关键词： two-dimensional material graphdiyne perovskite solar cells power conversion efficiency stability