Article
Chemistry, Multidisciplinary
David Trieb, Paul W. M. Blom, Gert-Jan A. H. Wetzelaer
Summary: A general method is proposed to achieve an ohmic electron contact in organic semiconductor devices by inserting a thin organic interlayer between the metal electrode and the organic semiconductor. It is demonstrated that this interlayer can significantly enhance the injected electron current by over three orders of magnitude. The formation of an ohmic contact is attributed to the elimination of barrier formation through direct contact between the metal and organic semiconductor. Additionally, it is shown that solution processing of such interlayers on top of organic semiconductors is feasible.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Organic
Bruno Salgues, Rudraditya Sarkar, Muhammad Luthfi Fajri, Yatzil Alejandra Avalos-Quiroz, Anne-Doriane Manick, Michel Giorgi, Nicolas Vanthuyne, Yannick Carissan, Christine Videlot-Ackermann, Jorg Ackermann, Gabriel Canard, Jean-Luc Parrain, Boris Le Guennic, Denis Jacquemin, Muriel Amatore, Laurent Commeiras, Elena Zaborova, Frederic Fages
Summary: The novel di(benz[f]indenone)-fused tetraazaanthracene derivative synthesized in this study showed strong electron-accepting character, making it attractive for the generation of n-channel semiconducting materials. It exhibited electron transport in organic field effect transistors and demonstrated potential as an electron acceptor material in organic solar cells.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Zi Wang, Jing Hu, Jie Lu, Xiaofei Zhu, Xu Zhou, Lizhen Huang, Lifeng Chi
Summary: We report a method of widely tuning the gas sensitivity of organic semiconductor (OSC) gas sensors through charge transport manipulation, achieving an ultrahigh sensitivity to NO2 of nearly 2000%/ppm and a fast square-wave-like response feature. This approach is also effective for tuning the sensitivity to reductive gases, demonstrating its generality for promoting the performance of OSC gas sensors, as well as a promising strategy for other types of sensors or detectors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Huipeng Ma, Feng Lin, Shibo Cheng, Jin-Dou Huang
Summary: In this study, the electronic structures and conducting properties of BN-embedded perylene diimides (B2N2-PDIs) were systematically investigated. The substitution of C-C units with B-N units in the pi-electron core was found to significantly affect the reorganization energies, ionization potential, and electron affinity of the PDIs. It was also revealed that B2N2-PDIs have the potential to be developed as high-efficiency n-type organic semiconductor materials. Additionally, the three-dimensional angular resolution anisotropic mobility of 6-CH, 6-EH, and 6-DIPP was simulated for the first time, and their charge carrier-transport properties were characterized.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Yongfan Yang, Lygia Silva de Moraes, Christian Ruzie, Guillaume Schweicher, Yves Henri Geerts, Alan R. Kennedy, Hengyu Zhou, St John Whittaker, Stephanie S. Lee, Bart Kahr, Alexander G. Shtukenberg
Summary: Many molecular crystals grow as twisted, helicoidal ribbons from the melt, and this twisting enhances the charge mobility. The effect of twisting on charge mobility is analyzed for a monocomponent organic semiconductor, and it is found that smaller pitches (more twisted) result in significantly higher carrier mobilities. X-ray scattering and Mueller matrix polarimetry are used to analyze the microscale organization of the polycrystalline films. The greater number of tightly packed twisted fibers in the film allows for better charge transport.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiaohui Liu, Yangyang Hu, Danting Li, Guiling Zhang, Wei Quan Tian
Summary: Based on the successful achievement of single-molecule graphene-C-60 transistors, a series of double-layered GNR-C-60 devices were designed and investigated for their transport properties. The overall conductivity of these devices followed the sequence: H/GNR-C-60 > S/GNR-C-60 > O/GNR-C-60. All devices showed multiple negative differential resistance (NDR) within the considered bias range. The NDR behavior was influenced by various factors such as passivated edges, electrode linkages, interactions between graphene nanoribbons, and applied voltage.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Multidisciplinary Sciences
Xinwen Yan, Miao Xiong, Xin-Yu Deng, Kai-Kai Liu, Jia-Tong Li, Xue-Qing Wang, Song Zhang, Nathaniel Prine, Zhuoqiong Zhang, Wanying Huang, Yishan Wang, Jie-Yu Wang, Xiaodan Gu, Shu Kong So, Jia Zhu, Ting Lei
Summary: By carefully designing the structure of conjugated polymers, their tolerance to disorder induced by doping can be increased, leading to better n-doping efficiency and higher electrical conductivity.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Tucker L. Murrey, Melissa Berteau-Rainville, Goktug Gonel, Jan Saska, Nikolay E. Shevchenko, Alice S. Fergerson, Rachel M. Talbot, Nichole L. Yacoub, Fengyu Zhang, Antoine Kahn, Mark Mascal, Ingo Salzmann, Adam J. Moule
Summary: Conjugated polymers can be chemically tailored for different electronic device applications. The relationship between conductivity, mobility, and charge density is poorly understood, but studies have shown that the polaron density has a larger effect on increasing both conductivity and charge mobility than changes in the polymer chemistry or structure.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Daniel Vong, Tahereh Nematiaram, Makena A. Dettmann, Tucker L. Murrey, Lucas S. R. Cavalcante, Sadi M. Gurses, Dhanya Radhakrishnan, Luke L. Daemen, John E. Anthony, Kristie J. Koski, Coleman X. Kronawitter, Alessandro Troisi, Adam J. Moule
Summary: The study demonstrates that relying on calculations from only the Gamma-point instead of the full Brillouin zone may overestimate a in small molecule semiconductors by up to 28%. Additionally, mode analysis reveals that no single mode dominates the phonon spectrum, highlighting the need to develop design rules considering the full spectrum of phonon modes.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Yao Chen, Jianglin Wu, Shirong Lu, Antonio Facchetti, Tobin J. Marks
Summary: In this study, the structural and electronic properties trends of a series of n-type semiconducting copolymers were evaluated. The reduction of NDI carbonyl groups was found to increase the LUMO energy. Additionally, the thienyl attachment regiochemistry played a significant role in the performance of the copolymers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Nanoscience & Nanotechnology
Colin Tyznik, James Lee, Jeni Sorli, Xiaojie Liu, Emma K. Holland, Cynthia S. Day, John E. Anthony, Yueh-Lin Loo, Z. Valy Vardeny, Oana D. Jurchescu
Summary: The study shows that by adjusting the microstructure of the electronically active layers at the interface of hybrid organic-inorganic metal-halide perovskites and organic semiconductors, the photocurrent response can be significantly enhanced, leading to improved performance of photodetectors.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jongbok Lee, Shi Li, Xiaozhou Ji, Sai Che, Yirui Cao, Daniel P. Tabor, Lei Fang
Summary: This study investigates the factors affecting the doping mechanism of organic semiconductors using neutral dopants. The results show that the extended, rigid, and coplanar pi-faces play a crucial role in the doping interaction. This work provides principles for the molecular design of organic semiconductors and dopants.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Marc-Antoine Stoeckel, Yoann Olivier, Marco Gobbi, Dmytro Dudenko, Vincent Lemaur, Mohamed Zbiri, Anne A. Y. Guilbert, Gabriele D'Avino, Fabiola Liscio, Andrea Migliori, Luca Ortolani, Nicola Demitri, Xin Jin, Young-Gyun Jeong, Andrea Liscio, Marco-Vittorio Nardi, Luca Pasquali, Luca Razzari, David Beljonne, Paolo Samori, Emanuele Orgiu
Summary: Charge transport in organic semiconductors is highly sensitive to disorder, especially in n-type materials, due to internal dynamic disorder caused by thermal fluctuations and molecular vibrations. This disorder can lead to transient localization of charge carriers.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shao-Wei Tu, Shuang Huang, Si-Nan Li
Summary: By introducing different substituents, the charge transfer performance and photoelectric characteristics of 2,5-di(pyridine-2-yl)thiophene (DPT) infrastructure can be adjusted, improving the charge transfer ability of the molecules.
Article
Chemistry, Multidisciplinary
Junfeng Guo, Yan Zeng, Yonggang Zhen, Hua Geng, Zongrui Wang, Yuanping Yi, Huanli Dong, Wenping Hu
Summary: This study utilized non-equal ratio cocrystal engineering to construct cocrystals with more appropriate packing structure through hydrogen bonds and donor-acceptor interactions, leading to an improved carrier mobility of organic semiconductors.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Sarune Daskeviciute-Geguziene, Yi Zhang, Kasparas Rakstys, Gediminas Kreiza, Sher Bahadar Khan, Hiroyuki Kanda, Sanghyun Paek, Maryte Daskeviciene, Egidijus Kamarauskas, Vygintas Jankauskas, Abdullah M. Asiri, Vytautas Getautis, Mohammad Khaja Nazeeruddin
Summary: Cyclobutane-based hole-selective materials were successfully synthesized using simple and green-chemistry inspired protocols, reducing costs and adverse environmental impact in perovskite solar cell applications. These materials resulted in impressive efficiency and stability in PSCs, with modules achieving record efficiency over 19% in an active area of 30.24 cm².
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Energy & Fuels
Suer Zhou, Maryte Daskeviciene, Matas Steponaitis, Giedre Bubniene, Vygintas Jankauskas, Kelly Schutt, Philippe Holzhey, Ashley R. Marshall, Pietro Caprioglio, Grey Christoforo, James M. Ball, Tadas Malinauskas, Vytautas Getautis, Henry J. Snaith
Summary: New carbazole-based enamine molecules can substitute high-cost bespoke chemicals in perovskite solar cells, improving efficiency and stability. These new hole conductors do not require chemical oxidation, reducing material costs and potentially reducing the manufacturing costs of future photovoltaic modules compared to traditional products.
Article
Energy & Fuels
Aiste Jegorove, Minh Anh Truong, Richard Murdey, Maryte Daskeviciene, Tadas Malinauskas, Kristina Kantminiene, Vygintas Jankauskas, Vytautas Getautis, Atsushi Wakamiya
Summary: Five new star-shaped carbazole-based molecules were successfully synthesized as hole transporting materials in perovskite solar cells to replace spiro-OMeTAD. These molecules exhibited comparable power conversion efficiencies to spiro-OMeTAD, with two candidate molecules showing superior thermal stability due to ethyl side chains.
Article
Chemistry, Multidisciplinary
Sarune Daskeviciute-Geguziene, Yi Zhang, Kasparas Rakstys, Chuanxiao Xiao, Jianxing Xia, Zhiheng Qiu, Maryte Daskeviciene, Tomas Paskevicius, Vygintas Jankauskas, Abdullah M. Asiri, Vytautas Getautis, Mohammad Khaja Nazeeruddin
Summary: In this study, a series of donor-acceptor-donor (D-A-D) type small molecules based on fluorene and diphenylethenyl enamine units were developed as hole transporting materials (HTMs) for perovskite solar cells. The incorporation of malononitrile acceptor units not only improved carrier transportation efficiency but also passivated defects through Pb-N interactions. The HTM V1359 achieved a higher power conversion efficiency of over 22% compared to spiro-OMeTAD under the same conditions, demonstrating that HTMs prepared via simplified synthetic routes are not only a cost-effective alternative to spiro-OMeTAD but also exhibit superior efficiency and stability than materials obtained through expensive cross-coupling methods.
ADVANCED FUNCTIONAL MATERIALS
(2023)
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
Energy & Fuels
Deimante Vaitukaityte, Minh Anh Truong, Kasparas Rakstys, Richard Murdey, Tsukasa Funasaki, Takumi Yamada, Yoshihiko Kanemitsu, Vygintas Jankauskas, Vytautas Getautis, Atsushi Wakamiya
Summary: This study designs and synthesizes a series of HTMs with different central heteroatom cores and molecular structures, which exhibit comparable performance to spiro-OMeTAD in PSCs. The work demonstrates how high-performing HTMs for PSCs can be produced using a simple condensation approach.
Article
Materials Science, Multidisciplinary
Aurimas Vysniauskas, Simon Keegan, Kasparas Rakstys, Tobias Seewald, Vytautas Getautis, Lukas Schmidt-Mende, Azhar Fakharuddin
Summary: This research demonstrates the importance of compositional tuning using different 2D cations for perovskite emissive layers. The ratio between the 2D cation and the [PbX6]4- component affects the electrical transport and emission properties of the device. Excess cations are required to enhance the external quantum efficiency of PeLEDs, with FPEA achieving the highest EQE and BPEA resulting in the lowest EQE. Additionally, FPEA-based perovskite exhibits fewer pinholes and traps, as well as better charge transport properties.
ORGANIC ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Lauryna Monika Svirskaite, Sreekanth Mandati, Nicolae Spalatu, Vida Malinauskiene, Smagul Karazhanov, Vytautas Getautis, Tadas Malinauskas
Summary: New electron transporting materials containing 1,4,5,8,-naphtalenetetracarboxylic diimide central fragment along with various anchoring groups were synthesized and investigated for possible application in photovoltaic devices. These semiconductors demonstrated good thermal stability and suitable electrochemical properties for effective electron transport from absorber layer to cathode. The self-assembled monolayers of these materials showed increased contact angle, indicating bond formation between the monolayer forming molecules and the surface of Sb2S3, Sb2Se3, or the perovskite.
Article
Chemistry, Multidisciplinary
Yuanbao Lin, Yadong Zhang, Artiom Magomedov, Eleftheria Gkogkosi, Junxiang Zhang, Xiaopeng Zheng, Abdulrahman El-Labban, Stephen Barlow, Vytautas Getautis, Ergang Wang, Leonidas Tsetseris, Seth R. Marder, Iain McCulloch, Thomas D. D. Anthopoulos
Summary: The incorporation of Br-2PACz/MoO3 in inverted OPVs enhances the performance of the cells and improves their operational stability.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Amran Al-Ashouri, Mantas Marcinskas, Ernestas Kasparavicius, Tadas Malinauskas, Axel Palmstrom, Vytautas Getautis, Steve Albrecht, Michael D. McGehee, Artiom Magomedov
Summary: The wettability issue of the Me-4PACz hole-selective monolayer is resolved by adding a second component to the precursor solution. This not only improves the device yield but also maintains similar performance.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Aiste Jegorove, Jianxing Xia, Matas Steponaitis, Maryte Daskeviciene, Vygintas Jankauskas, Alytis Gruodis, Egidijus Kamarauskas, Tadas Malinauskas, Kasparas Rakstys, Khalid A. Alamry, Vytautas Getautis, Mohammad Khaja Nazeeruddin
Summary: A group of small-molecule hole-transporting materials based on fluorenylidene fragments were synthesized and tested in perovskite solar cells. The highest power conversion efficiency of 22.83% was achieved by a PSC device doped with lithium bis(trifluoromethane-sulfonyl)imide (LiTFSI). The best performing hole-transporting material V1387 showed improved stability compared to spiro-MeOTAD.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Deimante Vaitukaityte, Artiom Magomedov, Kasparas Rakstys, Simon Kwiatkowski, Egidijus Kamarauskas, Vygintas Jankauskas, Jolanta Rousseau, Vytautas Getautis
Summary: Perovskite solar cells are a promising photovoltaic technology that may soon be available commercially. However, unresolved issues surrounding their lifetime and fabrication cost hinder their competitiveness with existing technologies. To address this, we have developed small organic molecules with vinyl groups as hole transporting materials that can undergo thermal polymerization, forming solvent-resistant 3D networks. These novel compounds, synthesized from inexpensive starting materials, offer a potential alternative to reduce the manufacturing cost of perovskite solar cells by simplifying the purification process.
Article
Chemistry, Multidisciplinary
Sarune Daskeviciute-Geguziene, Artiom Magomedov, Maryte Daskeviciene, Kristijonas Genevicius, Nerijus Nekrasas, Vygintas Jankauskas, Kristina Kantminiene, Michael D. McGehee, Vytautas Getautis
Summary: In this study, Carbazole-based molecules V1205 and V1206 were synthesized and utilized as hole-transporting materials in inverted perovskite solar cells. The newly developed HTMs were thermally polymerized to form films resistant to organic solvents. A PSC with V1205 achieved a photovoltaic conversion efficiency of 16.9% and exhibited good stability.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Nimish Juneja, Sreekanth Mandati, Atanas Katerski, Nicolae Spalatu, Sarune Daskeviciute-Geguziene, Aivars Vembris, Smagul Karazhanov, Vytautas Getautis, Malle Krunks, Ilona Oja Acik
Summary: The application of Sb2S3 solar cells is limited by their low power conversion efficiency and the use of expensive hole transport materials. By using V1236 as a novel HTM instead of P3HT, the efficiency and transparency of solar cells can be improved.
SUSTAINABLE ENERGY & FUELS
(2022)
