Article
Nanoscience & Nanotechnology
Ming Liu, Mengyang Li, Yufeng Jiang, Zaifei Ma, Duanzijing Liu, Zhongjie Ren, Thomas P. Russell, Yao Liu
Summary: Conductive ionenes were synthesized by integrating donor and acceptor compounds, optimizing film properties through varying ratios, and enhancing pi-pi interactions. These materials significantly modify electrode interfaces, boosting efficiency particularly in organic solar cells with a range of interlayer thicknesses, achieving high power conversion efficiencies.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Energy & Fuels
Lennart K. Reb, Michael Boehmer, Benjamin Predeschly, Sebastian Grott, Christian L. Weindl, Goran I. Ivandekic, Renjun Guo, Lukas V. Spanier, Matthias Schwartzkopf, Andrei Chumakov, Christoph Dreissigacker, Roman Gernhaeuser, Stephan V. Roth, Andreas Meyer, Peter Mueller-Buschbaum
Summary: This study presents a detailed analysis of irradiation-dependent photovoltaic parameters of perovskite and organic solar cells exposed to space conditions. In orbital altitudes, perovskite and organic solar cells reach power-conversion efficiencies of more than 13% and 6%, respectively. Minor changes in the active layer morphology induced by transport have no significant impact on performance, indicating promising results for further orbital demonstration.
Review
Energy & Fuels
Ting Yu, Dongling Ma
Summary: Nonfullerene acceptors (NFAs) are a focus of research in the development of organic solar cells (OSCs) due to their tunable properties. This review discusses the relationship between the structural characteristics of NFAs and the morphology of OSCs, as well as the challenges of characterizing the morphology of NFA-based films. Strategies for optimizing morphology through material design and processing are also presented.
Article
Chemistry, Multidisciplinary
Daniel Powell, Xueqiao Zhang, Chideraa Nwachukwu, Edwin J. Miller, Kameron R. Hansen, Laura Flannery, Jonathan Ogle, Alex Berzansky, John G. Labram, Andrew G. Roberts, Luisa Whittaker-Brooks
Summary: Self-doping is an important doping method for organic semiconductors, but the relationship between dopant structure and function still needs further investigation. Studies have shown that using sterically encumbered ammoniums with short tethers and Lewis basic counterions enable the best self-n-doping effect, while water inhibits doping.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yuxiang Li, Huiting Fu, Ziang Wu, Xin Wu, Mei Wang, Hongmei Qin, Francis Lin, Han Young Woo, Alex K-Y Jen
Summary: This study successfully optimized the film structure of polymer solar cells by systematically adjusting the molecular aggregation patterns of unfused non-fullerene acceptors (UF-NFAs), leading to improved efficiency of the photovoltaic devices.
Article
Chemistry, Multidisciplinary
Benjamin R. Luginbuhl, Parth Raval, Tomasz Pawlak, Zhifang Du, Tonghui Wang, Grit Kupgan, Nora Schopp, Sangmin Chae, Sangcheol Yoon, Ahra Yi, Hyo Jung Kim, Veaceslav Coropceanu, Jean-Luc Bredas, Thuc-Quyen Nguyen, G. N. Manjunatha Reddy
Summary: This study introduces a combined method to elucidate atomic-scale interactions in Y6 crystals, thin films, and PM6:Y6 blends, providing insights into the application of NFAs in high-performance organic solar cells.
ADVANCED MATERIALS
(2022)
Article
Energy & Fuels
Isidora Susic, Kassio P. S. Zanoni, Abhyuday Paliwal, Ismail C. Kaya, Zafer Hawash, Michele Sessolo, Ellen Moons, Henk J. Bolink
Summary: This study investigates the characteristics of thin hole transport layers (HTLs) in vacuum-deposited perovskite solar cells. It is found that only very thin HTLs (<5 nm) result in high-performing devices, while thicker films (>= 5 nm) exhibit dynamic behavior in consecutive electrical measurements. Furthermore, small-molecule HTLs are found to lead to thermally unstable solar cells, possibly due to chemical reactions/diffusion at the interface with the perovskite layer.
Article
Chemistry, Physical
Danqin Li, Fushan Geng, Tianyu Hao, Zeng Chen, Hongbo Wu, Zaifei Ma, Qifan Xue, Lina Lin, Rong Huang, Shifeng Leng, Bingwen Hu, Xianjie Liu, Jie Wang, Haiming Zhu, Menglan Lv, Liming Ding, Mats Fahlman, Qinye Bao, Yongfang Li
Summary: In this study, an organic solar cell was developed with improved power conversion efficiency by doping DMBI-BDZC into the photoactive layer. The doped layer exhibited enhanced carrier mobilities, effective exciton dissociation, longer carrier lifetime, and suppressed charge recombination.
Article
Chemistry, Multidisciplinary
Dennis Derewjanko, Dorothea Scheunemann, Emmy Jaersvall, Anna Hofmann, Christian Mueller, Martijn Kemerink
Summary: This study reveals a power-law relationship between conductivity and charge density in strongly p-doped conjugated polymers at high doping levels. Conventional models fail to explain this behavior, but a variable range hopping model with an energy-dependent localization length can. The superlinear increase in conductivity with charge density is observed when the Fermi level reaches partially delocalized states.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Alina F. Latypova, Nikita A. Emelianov, Dmitry O. Balakirev, Polina K. Sukhorukova, Nadezhda K. Kalinichenko, Petr M. Kuznetsov, Yuriy N. Luponosov, Sergey M. Aldoshin, Sergey A. Ponomarenko, Pavel A. Troshin, Lyubov A. Frolova
Summary: This study explores a series of small molecules as dopant-free hole-transport materials for high-efficiency and stable perovskite solar cells. The best performance is achieved using the triazatruxene-based molecule TAT-2T-CNA, which exhibits optimal optoelectronic properties and defectless film morphology. The use of scanning near-field infrared microscopy is shown to be useful for detecting and visualizing defects in the hole-transport materials, which strongly correlate with device performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Yongfeng Ni, Xuan Liu, Yang Liu, Zhendong Feng, Dandan Tu, Xin Guo, Can Li
Summary: A new concept of nonalloy model is proposed for ternary organic solar cells, which can achieve high efficiency and stability by introducing a third component with moderate miscibility and distributing it in the interspace between donor and acceptor domains.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Yuanbao Lin, Yadong Zhang, Junxiang Zhang, Mantas Marcinskas, Tadas Malinauskas, Artiom Magomedov, Mohamad Insan Nugraha, Dimitris Kaltsas, Dipti R. Naphade, George T. Harrison, Abdulrahman El-Labban, Stephen Barlow, Stefaan De Wolf, Ergang Wang, Iain McCulloch, Leonidas Tsetseris, Vytautas Getautis, Seth R. Marder, Thomas D. Anthopoulos
Summary: The influence of halogen substitutions on the energy levels of a self-assembled hole-extracting molecule and its performance in organic photovoltaic cells are investigated. It is found that Cl-2PACz-based cells exhibit the highest power conversion efficiency and enhanced stability.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jianfeng Li, Min Liu, Kun Yang, Yimei Wang, Junwei Wang, Zhicai Chen, Kui Feng, Dong Wang, Jianqi Zhang, Yongchun Li, Han Guo, Zhixiang Wei, Xugang Guo
Summary: By devising a novel selenophene-based electron-deficient building block, the pronounced advantages of selenium substitution in enabling advanced n-type polymers are demonstrated. The resulting selenium-substituted polymer achieves high conductivity and power factor, surpassing the sulfur-based analogue polymer by 40% conductivity increase. These results provide important insights for developing high-performing n-type organic thermoelectric materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Gao-Yang Ge, Jia-Tong Li, Juan-Rong Wang, Miao Xiong, Xue Dong, Zu-Jian Li, Jiu-Long Li, Xiao-Yu Cao, Ting Lei, Jin-Liang Wang
Summary: Three n-type small-molecule organic semiconductors with different end functional groups were synthesized in this study. The results suggest that high intrinsic charge carrier mobility and high doping level cannot guarantee high electrical conductivity, and maintaining good charge transport pathways after doping is also critical.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zongtao Wang, Helin Wang, Mengzheng Du, Xue Lai, Feng He, Qing Guo, Qiang Guo, Ailing Tang, Xiangnan Sun, Erjun Zhou
Summary: A fused NDTI derivative is used as a cathode interlayer material in organic solar cells, showing excellent film-forming capacity and strong crystallinity. The NDTI-based solar cells achieve a high power conversion efficiency using different active layer materials and exhibit good stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Shuyan Yang, Nassim Hemmati, Thomas Russell, Abbas Zeinijahromi, Sara Borazjani, Aron Behr, Luis Genolet, Pavel Bedrikovetsky
Summary: This study focuses on analyzing the three-dimensional effects in short cores during steady-state tests for relative permeability and capillary pressure. It was found that although 3D flow effects influenced the measurement data, the agreement between K-r and P-c obtained from 3D and 1D models was close, with the Spiral distributor showing lower 3D flow effects and more accurate determination of relative permeability and capillary pressure from SSTT tests.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Psychology, Multidisciplinary
Paul Youngbin Kim
Summary: This study examines the association between endorsement of the model minority stereotype by Asian Americans and mental health, and explores the moderating roles of religion and God representation. The findings suggest that both authoritarian and benevolent God representations play a role in moderating this association. This novel integration of the model minority and religiosity literature has promising implications for professionals working with Asian Americans in Christian settings.
PSYCHOLOGY OF RELIGION AND SPIRITUALITY
(2023)
Article
Ethnic Studies
Paul Youngbin Kim, Joel Jin, Katharine E. Bau
Summary: This study indicates that self-compassion plays a significant role in fostering positive attitudes towards professional counseling among Asian American college students, while emotional self-control is significantly associated with unfavorable help-seeking attitudes.
ASIAN AMERICAN JOURNAL OF PSYCHOLOGY
(2022)
Article
Ethnic Studies
Kyu Jin Yon, Hun Je Jo, Paul Youngbin Kim
Summary: This study found that adhering to certain East Asian cultural values is associated with life satisfaction among Korean college students, and these associations differ by gender. The study highlights the importance of considering the interaction between cultural values and gender when assisting Asian college students in the context of cultural shifts.
ASIAN AMERICAN JOURNAL OF PSYCHOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Yixuan Yin, Tan Liu, Beibei Wang, Bangqi Yin, Yang Yang, Thomas P. Russell, Shaowei Shi
Summary: By using the interfacial complexation of a polyelectrolyte (PE) and cellulose nanocrystals (CNCs), a unique interfacial PE/CNC complex is demonstrated for stabilizing aqueous two-phase systems and fabricating all-aqueous double emulsions and 3D constructs.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Orthopedics
Andrew P. Adamczyk, Paul R. Kim, Isabel Horton, Wade Gofton, Paul E. Beaule, George Grammatopoulos
Summary: This study aims to improve efficiency and cost-effectiveness of total hip arthroplasty (THA) by simplifying the instrument setup. The study found that adopting a more minimalist approach to instrument setup can lead to significant savings in cost, energy, and waste, without compromising surgical time and patient safety.
JOURNAL OF ARTHROPLASTY
(2022)
Article
Orthopedics
Alison Suraci, Gavin Wood, Michael Tanzer, Au Keegan, Stephen Burnett, Jennifer Leighton, David Zukor, Veronica Wadey, Kelly Johnston, Nicholas Desy, Paul Kim, James Howard, Brent Lanting, Leonard Rosen, Steven MacDonald, Emil Schemitsch, John Antoniou
Summary: This study investigated the psychological well-being of Canadian arthroplasty surgeons during the peak of the first wave of the COVID-19 pandemic. The results showed that approximately 38% of the surgeons experienced emotional distress and 29% experienced depression. The main factors contributing to psychological morbidity were concerns about loss of income, emotional conflict, and safety worries. However, the majority of surgeons demonstrated insight into the impact of COVID-19 on their emotional health.
JOURNAL OF ARTHROPLASTY
(2022)
Article
Orthopedics
Helene R. Cook, Nicole K. Cates, Christopher J. Kennedy, Eshetu Tefera, Daniel Popovsky, Kevin Delijani, Paul J. Kim, Christopher E. Attinger, John S. Steinberg
Summary: The study aims to determine the risks of major lower extremity amputation after Vertical Contour Calcanectomy and identifies factors such as gender, primary closure, vascular disease, and preoperative ambulatory status that are associated with postoperative recovery.
JOURNAL OF FOOT & ANKLE SURGERY
(2022)
Article
Surgery
Sarah Yang, Emily Esposito, Chance Spalding, Joshua Simpson, Julie A. Dunn, Linda Zier, Sigrid Burruss, Paul Kim, Lewis E. Jacobson, Jamie Williams, Jeffry Nahmias, Areg Grigorian, Laura Harmon, Anna Gergen, Matthew Chatoor, Rishi Rattan, Andrew J. Young, Jose L. Pascual, Jason Murry, Adrian W. Ong, Alison Muller, Rovinder S. Sandhu, Rachel Appelbaum, Nikolay Bugaev, Antony Tatar, Khaled Zreik, Mark J. Lieser, Thomas M. Scalea, Deborah M. Stein, Margaret Lauerman
Summary: The study aims to investigate the stroke risk factors specific to grade 1 ICA BCVI. It found that persistence of injury may increase the risk of stroke, and some strokes still occurred despite initiation of medical therapy. Repeat imaging is recommended to evaluate the progression or resolution of injury in grade 1 ICA BCVI.
Article
Orthopedics
Andrew Adamczyk, Pierre Laboudie, Hamid Nessek, Paul R. Kim, Wade T. Gofton, Robert Feibel, George Grammatopoulos
Summary: This study retrospectively reviewed 204 patients (220 hips) who underwent elective total hip arthroplasty (THA) between November 2016 and December 2019. The study analyzed templates from 5 different surgeons and compared the accuracy of preoperative digital templating for different stem designs and surgical approaches. The results showed that the accuracy of femoral component size templating was significantly improved with a single-wedge mid-short stem design. The precision of cup sizing was better in the posterior approach group. Accuracy of templating was found to be dependent on the presence of a calibration marker and the stem design.
Article
Respiratory System
Christopher N. Schmickl, Jeremy E. Orr, Paul Kim, Brandon Nokes, Scott Sands, Sreeganesh Manoharan, Lana McGinnis, Gabriela Parra, Pamela DeYoung, Robert L. Owens, Atul Malhotra
Summary: This study developed a prediction model of loop gain based on readily-available clinical data, which can be used to predict patients with high loop gain in obstructive sleep apnea and has moderate discrimination ability.
BMC PULMONARY MEDICINE
(2022)
Article
Psychiatry
Jung H. Hyun, Paul Youngbin Kim, Hee-Sun Cheon, David Leong
Summary: This study investigated the experiences of Asian American Christian faculty in terms of stereotypes and discrimination, and examined their responses to these experiences. The findings reveal that these faculty members face stereotypes and discrimination at the interpersonal level, as well as the perpetuation of stereotypes and discriminatory practices at the institutional or systemic level.
MENTAL HEALTH RELIGION & CULTURE
(2022)
Article
Chemistry, Multidisciplinary
Paul Y. Kim, Zachary Fink, Qingteng Zhang, Eric M. Dufresne, Suresh Narayanan, Thomas P. Russell
Summary: The relaxation and aging processes of spherical nanoparticles at a water-oil interface were studied using grazing incidence X-ray photon correlation spectroscopy. It was observed that weak attractions between the nanoparticles resulted in gel-like structures, while the broad size distribution of the nanoparticles inhibited in-plane ordering. Structural rearrangements occurred through intermittent fluctuations rather than continuous cooperative motions.
Article
Materials Science, Multidisciplinary
Yuren Xiang, Yameng Cao, Wenqiang Yang, Rui Hu, Sebastian Wood, Bowei Li, Qin Hu, Fan Zhang, Jujie He, Mozhgan Yavari, Jinlai Zhao, Yunlong Zhao, Jun Song, Junle Qu, Rui Zhu, Thomas P. Russell, S. Ravi P. Silva, Wei Zhang
Summary: A recoverable laser-induced fluorescence quenching phenomenon was observed in perovskite films, indicating the impact of perovskite lattice deformation on transient optical properties. Adjusting charge carrier recombination can improve the bleaching resistance of perovskite grains.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Orthopedics
Kevin K. Ragothaman, Tammer X. Elmarsafi, Ariya Mobaraki, Caitlin S. Zarick, Karen K. Evans, John S. Steinberg, Christopher E. Attinger, Paul J. Kim
Summary: This study demonstrates that PCR can detect clinically relevant bacterial species in lower extremity wound infections and shows higher sensitivity compared to culture. Culture results show a significant decrease in the number of clinically relevant species detected from initial presentation to final closure, while PCR results show no significant changes.
JOURNAL OF FOOT & ANKLE SURGERY
(2022)