Article
Polymer Science
Langheng Pan, Tao Zhan, Yue Zhang, Junyu Li, Yifan Wu, Zhicai He, Ping Cai, Chunhui Duan, Fei Huang, Yong Cao
Summary: This study reports wide bandgap polymers based on 5,6-difluorobenzo[c][1,2,5]oxadiazole (ffBX) for non-fullerene organic solar cells. The solubility, solid state packing, and bulk-heterojunction morphology of the polymers are finely tuned through side chain engineering. Encouragingly, a decent efficiency of 14.25% is achieved with the polymer Oc25 blended with the non-fullerene acceptor Y6.
MACROMOLECULAR RAPID COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yan Wang, Yi Zhang, Tong Shan, Qingyun Wei, Zhenchuang Xu, Yanchuan Zhao, Jianming Yang, Qinye Bao, Hui Jin, Zaifei Ma, Hao Wei, Hongliang Zhong
Summary: By utilizing the conjugated macrocycle cyanostar, this study successfully modified the active layer and hole transporting layer of organic solar cells, improving device performance and demonstrating the potential of cyanostar in device optimization. Cyanostar dopes PEDOT:PSS and polymer donor, prolonging carrier lifetime, suppressing charge recombination, and enhancing charge transport and extraction efficiency.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Polymer Science
Bai-Qiao Liu, Yun-Hua Xu, Feng Liu, Cheng-Cheng Xie, Shi-Jie Liang, Qiao-Mei Chen, Wei-Wei Li
Summary: In this study, fullerene-contained double-cable conjugated polymers were successfully constructed using the functionalization-polymerization method. The power conversion efficiencies were increased by enhancing the fullerene contents. These conjugated polymers with molecular heterojunction show potential application in organic electronic devices.
CHINESE JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Lingyi Fang, Yuyan Zhang, Ming Ren, Xinrui Xie, Tianyu Li, Yi Yuan, Jing Zhang, Peng Wang
Summary: In this study, we report a triple helicene based molecular semiconductor, TBPC-611, which has a fully fused conjugated backbone and multiple pyrrole rings. TBPC-611 can be solution-processed with nonvolatile 4-tert-butylpyridinium bis(trifluoromethanesulfonyl)imide into a composite thin film with high electrical conductivity and high hole mobility, making it suitable for efficient and stable PSCs.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Kaikai Liu, Chengbo Tian, Yuming Liang, Yujie Luo, Liqiang Xie, Zhanhua Wei
Summary: This article comprehensively reviews the application of fullerene materials in regulating carrier transport, passivating defects, and enhancing device stability in perovskite solar cells (PSCs). The influence of fullerene-related chemical interactions, including fullerene-perovskite, fullerene-inorganic electron transport layer (IETL), and fullerene-fullerene, on device performance is well discussed. The article also outlines future perspectives for the design and application of fullerene materials to improve PSCs performance and commercialization.
Article
Chemistry, Applied
M. M. Tepliakova, I. E. Kuznetsov, D. S. Zamoretskov, A. N. Zhivchikova, A. V. Lolaeva, M. A. Sandzhieva, S. V. Makarov, M. V. Klyuev, D. K. Sagdullina, E. O. Perepelitsina, Y. G. Gladush, A. G. Nasibulin, K. J. Stevenson, A. V. Akkuratov, A. D. Furasova
Summary: Conjugated polymers based on benzodithiophene (BDT) and thiophene-flanked thiazolothiazole block (Tz) were designed and studied as promising hole-transport materials (HTMs) for perovskite solar cells (PSCs). The position of side chain greatly affects their performance, and the polymer in-BDTTz showed higher power conversion efficiency and stable operation compared to aus-BDTTz and poly(triarylamine) (PTAA). These alkylsilyl-substituted benzodithiophene-based polymers could be potential dopant-free hole-transport materials for efficient and stable perovskite photovoltaics.
Article
Nanoscience & Nanotechnology
Ibrahim Oladayo Raji, Shuguang Wen, Yonghai Li, Da Huang, Xiaoyan Shi, Aziz Saparbaev, Chuantao Gu, Chunming Yang, Xichang Bao
Summary: Alkylthio groups can modulate the energy levels and molecular packing of organic semiconductors, which is important for designing materials for organic solar cells. Introducing alkylthio side chains into donor or acceptor units can lead to materials with different energy levels, optimizing performance in organic solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Haizhen Liu, Dong Yuan, Haiying Jiang, Suhan Li, Lianjie Zhang, Junwu Chen
Summary: Solution processing of a bulk-heterojunction (BHJ) active layer in air with high relative humidity (RH) usually results in an inferior power conversion efficiency (PCE) of organic solar cells (OSCs). This study demonstrates that attaching a siloxane-terminated side chain on photoactive materials is a valuable chemical countermeasure to allow air-processing and withstand large variations in humidity. The PQSi705:Y6 active layer exhibited high humidity endurance and achieved a PCE of over 16.1%, showing the highest efficiency reported for BHJ active layers fabricated in high RH air.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Energy & Fuels
Jinpeng Yang, Chunyan Wu, Tengzuo Huang, Fayin Yu, Shuo Ding, Lei Qian, Tao Sun, Chaoyu Xiang
Summary: The impacts of doping the organic hole transport layer (HTL) PTB7-Th with lithium bis(trifluoromethanesulfonimide) (LiTSFI) on the performance of quantum dot solar cells were investigated, and a notable enhancement in fill factor was observed. Doping with LiTFSI significantly deepened the Fermi level of the HTL, improving charge separation ability and conductivity. By optimizing doping conditions, the doped device achieved a maximum power conversion efficiency of 12.68%. This doping strategy of organic HTL promotes the development of lead sulfide quantum dot solar cell techniques.
Article
Chemistry, Multidisciplinary
Aline Makhloutah, Anderson Hoff, Antoine Goujon, Gregory C. Welch, Pietrick Hudhomme
Summary: In this study, a series of AzaBenzannulated PDI (AzaBPDI) multimers were synthesized and their potential as non-fullerene acceptors in bulk-heterojunction organic solar cells was investigated. The AzaBPDI dimers and trimer were easily prepared through a one-pot sequence of reactions. The AzaBPDI showed strong visible-light absorption and suitable LUMO energy levels, making them promising electron acceptors for organic solar cells. The combination of AzaBPDI with the donor polymer PM6 resulted in high device open-circuit voltages, demonstrating the potential of AzaBPDI for high-performance fullerene-free photovoltaics.
MATERIALS CHEMISTRY FRONTIERS
(2022)
Article
Polymer Science
Zhi-Guo Zhang, Yang Bai, Yongfang Li
Summary: The J-series polymers are a type of two-dimensional conjugated polymers with medium energy bandgap and strong absorption characteristics, exhibiting ordered crystalline structures and high hole mobilities, with energy levels tunable depending on structural variations.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Multidisciplinary Sciences
Weifan Wang, Fiona Hanindita, Yosuke Hamamoto, Yongxin Li, Shingo Ito
Summary: A fully conjugated azacorannulene dimer with a large pi-surface has been successfully synthesized, which exhibits unique selective association with a dumbbell-shaped C-60 dimer and shows high quantum yield of red fluorescence. The utilization of a fully conjugated bifunctional azomethine ylide for the synthesis of large multiazafullerene fragments is a powerful method and has significant implications for the selective total synthesis of multiazafullerenes.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Yi Yang, Jingwen Wang, Pengqing Bi, Qian Kang, Zhong Zheng, Bowei Xu, Jianhui Hou
Summary: A new CPE composite was developed as a HTM for organic solar cells through rational molecular design and mutual doping mechanism, achieving high work function and good conductivity. It showed superior performance in different types of OSCs and achieved the highest photovoltaic efficiency so far.
CHEMISTRY OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Naoya Nakao, Soichiro Ogawa, Hyung Do Kim, Hideo Ohkita, Tsubasa Mikie, Masahiko Saito, Itaru Osaka
Summary: The study found that achieving a balance between the backbone order and solubility of pi-conjugated polymers through careful molecular design can lead to higher photovoltaic performance in organic solar cells.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Kyu Chan Song, Byeong Jin Kim, Woong Sung, Se Gyo Han, Sein Chung, Jaewon Lee, Kilwon Cho
Summary: We study the effect of extending the length of the pi-conjugated central core in non-fused-ring electron acceptors on their energy levels and miscibility with donor polymers in organic solar cells. Increasing the length of the conjugated core raises the lowest unoccupied molecular orbital (LUMO) energy level. Solids with the longest conjugated core have the highest LUMO levels. The open-circuit voltage (V-OC) of the solar cells increases as the length of the conjugated core increases. The miscibility of the donor polymer with the acceptor is improved by increasing the length of the conjugated core. The narrower light-absorption range of the blend containing the acceptor with the longest conjugated core is compensated by the improved miscibility, resulting in comparable short-circuit current densities (J(SC)).
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Polymer Science
Yida Liu, Huie Zhu, Akira Watanabe, Shunsuke Yamamoto, Tokuji Miyashita, Masaya Mitsuishi
Summary: The study developed a catechol-containing polysiloxane adhesive to firmly anchor ZnO nanoparticles on plastic substrates for flexible UV detector applications, demonstrating outstanding mechanical stability and stable photo-response performance even after repeated bending. The results indicate the promising potential of polycyclosiloxane-based flexible devices for wearable detector applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Yuya Ishizaki, Shunsuke Yamamoto, Tokuji Miyashita, Masaya Mitsuishi
Summary: This study demonstrates selective ion permeation in surface-functionalized ultrathin NP SiO2 films under acidic pH conditions, paving the way for new applications in molecular separation and sensing based on ultrathin nanoporous films.
Article
Materials Science, Multidisciplinary
Shunsuke Yamamoto, Satoru Ando
Summary: This study investigated the cosmetic corrosion behavior of cold-rolled steel sheets without galvanizing and discovered that the progress of under-film corrosion consisted of 3 steps: red rust changing to black rust, corrosion progressing from the scribed part, and swelling behavior at the tip of under-film corrosion.
MATERIALS TRANSACTIONS
(2022)
Article
Nanoscience & Nanotechnology
Shunsuke Yamamoto, Anastasios G. Polyravas, Sanggil Han, George G. Malliaras
Summary: This study examines the factors controlling the neuromorphic response of organic electrochemical transistors (OECTs) and highlights the dependence of post-synaptic response timescale on the size of ions in the electrolyte. Modeling further reveals that the transient response of the ionic circuit of the OECT controls the neuromorphic response. These findings provide insights for a more rational design of OECT-based neuromorphic devices.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Shunsuke Yamamoto, Hiroyuki Kai
Summary: Organic-inorganic hybrid films based on TiO2 and a fluorinated polymer were fabricated and their properties were investigated. The preparation process and UV irradiation were found to have significant effects on the surface properties. These hybrid films have been used as substrates in biosensing applications, allowing the collection and analysis of body fluids on a single platform.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Physical
Dongxun Lyu, Yanting Jin, Pieter C. M. M. Magusin, Simone Sturniolo, Evan Wenbo Zhao, Shunsuke Yamamoto, Scott T. Keene, George G. Malliaras, Clare P. Grey
Summary: Operando NMR spectroscopy is used to quantify cation and water movement in organic mixed conductors, providing insights into charge-compensating interactions and ionic dynamics. The study sheds light on the working principles of organic mixed conductors and demonstrates the utility of operando NMR spectroscopy in revealing structure-property relationships in electroactive polymers.
Review
Polymer Science
Shunsuke Yamamoto
Summary: This article provides a summary of recent advancements in organic neuromorphic devices, with a focus on resistive switches (memristors) and organic electrochemical transistors. The article highlights the materials used in the active layers and device architectures, emphasizing the advantages of organic devices such as flexibility, biocompatibility, and easy fabrication processes.
POLYMER INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Shunsuke Yamamoto, Ryusei Miyako, Ryota Maeda, Yuya Ishizaki, Masaya Mitsuishi
Summary: A dipping-based process to prepare water-resistant PEDOT:PSS films on nonplanar surfaces is developed, without the need for crosslinkers. The films gain water resistance through sequential soaking in ethanol and water. These films serve as conductors and channel layers in organic electrochemical transistors.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Yuya Ishizaki, Akito Watanabe, Shunsuke Yamamoto, Masaya Mitsuishi
Summary: This study proposes a method of controlling ion diffusion and electron hopping in a polymer-based resistive switching device. The device consists of ferrocene-containing polyelectrolyte nanofilms as a switching layer and PEDOT:PSS films as a top electrode. The characteristics of resistive switching and short-circuited behavior in the device depend on the ferrocene contents and relative humidity. This study elucidates the unique features of polymer-based resistive switching devices, which can pave the way for neuromorphic and wearable electronics applications.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Kohei Sambe, Takashi Takeda, Norihisa Hoshino, Wakana Matsuda, Riku Miura, Kanae Tsujita, Shingo Maruyama, Shunsuke Yamamoto, Shu Seki, Yuji Matsumoto, Tomoyuki Akutagawa
Summary: In this study, alkylamide-substituted BTBT derivatives were prepared, which exhibited ferroelectric and semiconducting properties. The coexistence of two-dimensional electronic band structures was observed due to the herringbone arrangement of the BTBT pi core and the hydrogen-bonding chains of alkylamide units. The thin films of the derivatives showed suitable structures for organic field-effect transistors, with conducting layers parallel to the substrate surface. The introduction of alkylamide units also provided the potential for external stimulus-responsive organic semiconductors.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Kai Futamata, Tsunenobu Onodera, Shunsuke Yamamoto, Masaya Mitsuishi, Hidetoshi Oikawa
Summary: Surface-doping of fluoroalkyl trichlorosilane (FTS) on pi-conjugated polymer (P3HT) thin films using the vapor phase method was investigated. The effects of different amounts of FTS on the film's structural and electronic properties were evaluated. The results showed that FTS greatly enhanced the conductivity of the film, but also reduced the carrier mobility.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Tanyaradzwa N. Mangoma, Shunsuke Yamamoto, George G. Malliaras, Ronan Daly
Summary: Organic electrochemical transistors (OECTs) are essential in bioelectronics and printed electronics applications due to their simple structure, ease of tunability, biocompatibility, and suitability for different fabrication routes. This study presents a hybrid direct-write additive manufacturing approach to fabricating OECTs, combining 3D printing of conducting and insulating layers with inkjet printing of semiconducting thin films. The results demonstrate that this manufacturing method can rapidly produce OECTs and neuromorphic devices with good performance.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Sanggil Han, Shunsuke Yamamoto, Anastasios G. Polyravas, George G. Malliaras
ADVANCED MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Yongjoon Im, Yu Gao, Huie Zhu, Shunsuke Yamamoto, Jun Matsui, Tokuji Miyashita, Masaya Mitsuishi
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
(2020)
Article
Nanoscience & Nanotechnology
Yuya Ishizaki, Shunsuke Yamamoto, Tokuji Miyashita, Masaya Mitsuishi
ACS APPLIED NANO MATERIALS
(2020)
