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Andrew Herzing, Lucas Flagg, Chad R. Snyder, Lee Richter, Jonathan Onorato, Christine Luscombe, Ruipeng Li
We report the results of a combined grazing incidence wide-angle X-ray scattering (GIWAXS) and four-dimensional scanning transmission microscopy (4D-STEM) analysis of the effects of thermal processing on poly(3[2-(2-methoxyethoxy)ethoxy]-methylthiophene- 2
Jasleen K Bindra, Pragya Shrestha, Sebastian Engmann, Chad Cruz, David Gundlach, Emily Bittle, Jason Campbell
Time-resolved microwave conductivity (TRMC) is a contactless technique utilized for the investigation of carrier density, transport properties, trapping phenomena, and recombination parameters in charge transport materials. Traditional TRMC methods rely on
In this study a novel, all organic magnetic field sensor is presented based on an organic light emitting diode (OLED) and organic photodetector (OPD) with a maximum field sensitivity comparable to commercial Hall-sensors. The sensor function is driven by
Weigang Zhu, Guoping Li, Subhrangsu Mukherjee, Natalia Powers-Riggs, Leighton Jones, Eliot Gann, R Joseph Kline, Andrew Herzing, Jenna Logsdon, Lucas Flagg, Charlotte Stern, Ryan Young, Kevin Kohlstedt, George Schatz, Dean DeLongchamp, Michael Wasielewski, Ferdinand Melkonyan, Antonio Facchetti, Tobin Marks
Addressing pertinent and perplexing questions regarding why nonfullerene acceptors (NFAs) promote higher power conversion efficiencies (PCEs) than traditional fullerenes and how photoactive bulk heterojunction (BHJ) film morphology, charge photogeneration
Jiacheng Liu, Lingyu Yang, Phillip Pickett, Bumjun Park, Jennifer Schaefer
Li-ion batteries based on organic liquid electrolytes have been commercialized for decades. However, the flammability of the liquid electrolyte and propensity for reaction with metallic lithium anodes warrants the study of alternative electrolyte materials
Lee J. Richter, Bin Sun, Amin M. Najarian, Chao Zheng, Laxmi K. Sagar, Min-Jae Choi, Xiyan Li, Larissa Levina, Se-Woong Baek, Seungjin Lee, Ahmad R. Kirmani, Jehad Abed, Mengxia Liu, Peicheng Li, Oleksandr Voznyy, Zheng H. Lu, F. Pelayo G. de Arquer, Edward H. Sargent
Colloidal quantum dots (CQDs) are promising materials for IR light detection due to their tunable bandgap and their solution processing; however, to date, the time response of CQD IR photodiodes has been inferior to that provided by Si and InGaAs. We
Lee J. Richter, Lucas Flagg, Lauren Asselta, Nicholas D'Antona, Natalie Stingelin, Tommaso Nicolini, Jonathan Onorato, Christine Luscombe, Ruipeng Li
Organic mixed ionic electronic conductors (OMIECs) have the potential to enable diverse new technologies, ranging from biosensors to flexible energy storage devices and neuromorphic computing platforms. However, study of these materials in their operating
Subhrangsu Mukherjee, Guoping Li, Liang-Wen Feng, Leighton Jones, Robert Jacobberger, Wei Huang, Ryan Young, Robert Pankow, Weigang Zhu, Norman Lu, Kevin Kohlstedt, Vinod Sangwan, Michael Wasielewski, Mark Hersam, George Schatz, Dean DeLongchamp, Antonio Facchetti, Tobin Marks
The rational molecular design of non-fullerene acceptors (NFAs) in organic solar cells (OSCs) can profoundly influence the photovoltaic (OPV) performance. To date, NFA fluorination has proven beneficial to cell performance. However, there is a lack of
Guoping Li, Xiaohua Zhang, Subhrangsu Mukherjee, Wei Huang, Ding Zheng, Liang-Wen Feng, Yao Chen, Jianglin Wu, Vinod Sangwan, Mark Hersam, Dean DeLongchamp, Junsheng Yu, Antonio Facchetti, Tobin Marks
Non-fullerene acceptor (NFA) end group (EG) functionalization, especially by fluorination, affects not only the energetics but also the morphology of bulk-heterojunction (BHJ) organic solar cell (OSC) active layers, thereby influencing the power conversion
The charge-transfer (CT) state arising as a hybrid electronic state at the interface between charge donor and charge acceptor molecular units is important to a wide variety of physical processes in organic semiconductor devices. The exact nature of this
Jonathan Onorato, Zhongyang Wang, Yangyang Sun, Christian Nowak, Ban Dong, Lucas Flagg, Ruipeng Li, Lee J. Richter, Fernando Escobedo, Paul Nealey, Shrayesh Patel, Christine Luscombe
A major limitation for polymeric mixed ionic/electronic conductors (MIECs) is the trade-off between ionic and electronic conductivity; changes made that improve one typically hinder the other. In order to address this fundamental problem, this work
Sebastian Engmann, Emily Bittle, Lee J. Richter, Rawad Hallani, John Anthony, David J. Gundlach
Magneto electroluminescence (MEL) is emerging as a powerful tool for the study of spin dynamics in emitting devices. The shape of the MEL response is typically used to draw qualitative inference on the dominant process (singlet fission or triplet fusion)
Michela Prete, Elisa Ogliani, Mikkel Bregnhoj, Subham Dastidar, Jonas Lissau, Horst-Gunter Rubahn, Sebastian Engmann, Anne Ladegaard Skov, Michael Brook, Peter Ogilby, Adam Printz, Vida Turkovic, Morten Madsen
Photochemical and mechanical stability are critical factors in the production and application of organic solar cells. While these factors can individually be improved using different additives, there is no example of studies on the combined effects of such
Emily Bittle, Sebastian Engmann, Karl Thorley, John Anthony
Dynamics of triplet and singlet exciton populations in organic semiconductors offer interesting possibilities in improving optical device efficiency, while also attracting interest for future applications as manipulatable states for quantum-state based
Subhrangsu Mukherjee, Eliot Gann, Masrur M. Nahid, Terry McAfee, Andrew Herzing, Dean DeLongchamp, Harald W. Ade
Due to a general paucity of suitable characterization methods, the internal orientational ordering of polymer fibrils has rarely been measured despite its importance particularly for semi-conducting polymers. An emerging tool with sensitivity to bond
Subhrangsu Mukherjee, Dean DeLongchamp, Guoping Li, Xiaohua Zhang, Leighton Jones, Joaquin Alzola, Liang-Wen Feng, Weigang Zhu, Charlotte Stern, Junsheng Yu, Vinod K. Sangwan, Kevin L. Kohlstedt, Michael R. Wasielewski, Mark C. Hersam, George C. Schatz, Antonio Facchetti, Tobin Marks
The end-capping group (EG) is the essential electron-withdrawing component of nonfullerene acceptors (NFAs) in bulk heterojunction (BHJ) organic solar cells (OSCs). To systematically probe the impact of two frequent EG functionalization strategies, π
Lee J. Richter, Tommaso Nicolini, Jokubas Surgailis, Achileas Savva, Guillaume Wantz, Olivier Dautel, Georges Hadiziioannou, Natalie Stingelin
Organic mixed conductors find use in batteries, bioelectronics technologies, neuromorphic computing and sensing. While great progress has been achieved, polymer-based mixed conductors frequently experience significant volumetric changes during ion uptake
Ultrafast Time-Domain and Time-Resolved Terahertz (TDS/TRTS) spectroscopic methods are utilized to explore photoconductive properties of conjugated donor-acceptor co-polymers dispersed in room temperature toluene, a nonpolar dielectric solvent. TRTS
Alberto Scaccabarozzi, James Basham, Liyang Yu, Paul Westcott, Weimin Zhang, Aram Amassian, Iain McCulloch, Mario Caironi, David J. Gundlach, Natalie Stingelin
Organic electronics technologies have attracted considerable interest over the last decades and have become promising alternatives to conventional, inorganic platforms for specific applications. To fully exploit the touted potential of plastic electronics
Weigang Zhu, Subhrangsu Mukherjee, Joaquin Alzola, Vinod K. Sangwan, Samuel H. Amsterdam, Steven M. Swick, Leighton Jones, Michael Heiber, Guoping Li, Kevin L. Kohlstedt, Charlotte Stern, Dean DeLongchamp, Mark C. Hersam, George C. Schatz, Michael R. Wasielewski, Antonio Facchetti, Andrew Herzing, Lin Chen, Tobin Marks
Emerging nonfullerene acceptors (NFAs) with crystalline domains enable high-performance bulk heterojunction (BHJ) solar cells. Thermal annealing is known to enhance the BHJ photoactive layer morphology and performance. However, the microscopic mechanism of
Subhrangsu Mukherjee, Gang Wang, Liang-Wen Feng, Wei Huang, Yao Chen, Dengke Shen, Binghao Wang, Joseph Strzalka, Zheng Ding, Ferdinand Melkonyan, Jinhui Yan, J. Fraser Stoddart, Simone Fabiano, Dean DeLongchamp, Meifang Zhu, Antonio Facchetti, Tobin Marks
The rational creation of two-phase conjugated polymer systems with high levels of phase purity in each phase is challenging but crucial for realizing printed soft matter electronics. Here we report a mixed-flow microfluidic printing (MFMP) approach for two
Matthew Waldrip, Oana Jurchescu, David J. Gundlach, Emily Bittle
Organic semiconductors have sparked significant interest due to their inherent properties as flexible, solution processible, and chemically tunable electronic materials. In the last 10 years, the improvements in charge carrier mobility in small molecule