Article
Nanoscience & Nanotechnology
Kerong Yang, Weijiang Chen, Yushun Zhao, Yu He, Xin Chen, Bin Du, Wei Yang, Song Zhang, Yufei Fu
Summary: This study develops a general strategy to improve the dielectric strength of epoxy polymer matrix by constructing interface charge traps, using the -CF3 group in partial replacement of the -CH3 group. This strategy increases the dielectric strength and surface breakdown voltage while maintaining mechanical and thermal properties, holding potential for wide application in future electrical and electronic equipment requiring resilience to high-voltage stress.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Chenglong Li, Wei Wang, Chun Zhan, Qisheng Zhou, Defu Dong, Shengqiang Xiao
Summary: This study investigates the method of modulating the compatibility of host-dopant pairs in n-type organic semiconductors by changing the structure and lipophilicity of molecular n-dopants. A new n-dopant JLBI-H showed excellent performance in doping fullerene derivatives, demonstrating the influence of structural modification on doping effects.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Emilie Dauzon, Xavier Sallenave, Cedric Plesse, Fabrice Goubard, Aram Amassian, Thomas D. Anthopoulos
Summary: This study develops and evaluates two techniques to enhance the mechanical resistance and stretchability of bulk heterojunction active layers in organic solar cells without compromising photovoltaic performance. The addition of a cross-linker improves the power conversion efficiency by inducing increased aggregation of P3HT. On the other hand, the addition of elastomers acts as a mechanical softener, with SEBS elastomer showing excellent compatibility with various blend systems. The versatility and scalability of these approaches highlight their potential in manufacturing high-performance solar cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Physics, Applied
Ram Datt, Harrison Ka Hin Lee, Michael Spence, Matthew Carnie, Wing Chung Tsoi
Summary: Implantable biomedical electronics, such as pacemakers and drug pumps, can help humans overcome diseases. Currently, these devices rely on small batteries, which need to be replaced after a certain period of time. Recharging the battery can extend the replacement cycle.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Ziyun Huang, Ruimin Zhou, Min Lv, Hao Zhang, Chen Yang, Yanan Shi, Yi Tang, Jianqi Zhang, Kun Lu, Zhixiang Wei
Summary: This study introduces a new method to improve the performance of all-small-molecule organic solar systems through ternary strategies, incorporating a small amount of the IDIC acceptor into a ZR1-Cl : IDIC-4Cl based binary system. Results show that the good miscibility enabled by two structurally similar acceptors can enhance short circuit current, open circuit voltage, and fill factor, thereby increasing power conversion efficiency.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Philipp Marlow, Felix Manger, Karen Fischer, Christian Sprau, Alexander Colsmann
Summary: This research elucidates the mechanism behind the formation of stable P3HT dispersions, revealing that electrostatic effects play a dominant role in nanoparticle growth and dispersion stability. The study also shows that additional charges can be generated by light to enhance the electrostatic dispersion stability. This research provides a new approach for the fabrication of organic solar cells and optoelectronic thin-film devices.
Article
Chemistry, Inorganic & Nuclear
Tong Yan, Yu-Yang Li, Qin-Yi Gu, Jing Li, Jian Su, Hai-Ying Wang, Jing-Lin Zuo
Summary: A new Zn-MOF material containing both TTF and NDI units was successfully constructed using a space limiting effect. This material exhibited efficient near-infrared photothermal conversion performance, providing a promising strategy for the development of photothermal therapy materials.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Andriy Zhugayevych, Kun-Han Lin, Denis Andrienko
Summary: By neglecting intramolecular charge transfer, existing charge transport models of molecular solids fail to account for materials with quasi-degenerate spatially separated frontier orbitals. Through analyzing the electronic structure of a prototypical non-fullerene acceptor, ITIC-4F, it is found that the electron is localized on one of the acceptor blocks, indicating the necessity of considering intramolecular transfer in charge transport modeling. Failure to do so can lead to significant underestimation of charge carrier mobility for acceptor-donor-acceptor (A-D-A) molecules.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Mohamadreza Arab Baferani, Chuanyang Li, Yang Cao
Summary: This study reports a new solution for suppressing space charge in polymer dielectrics by incorporating 2D Talc nanoclay particles to enhance shallow trap mediated charge transport. This approach was verified in two different crystalline morphologies of polymers, leading to significant improvement in performance. The introduction of 2D Talc nanoclay modified the trap distribution in the polymer, increasing the number of shallow states and reducing the macroscopic activation energies. The resulting higher mobility of charge carriers contributed to the suppression of hetero-polar space charge, making this approach promising for HVDC cabling in future renewable energy systems.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Multidisciplinary Sciences
Xian'e Li, Qilun Zhang, Jianwei Yu, Ye Xu, Rui Zhang, Chuanfei Wang, Huotian Zhang, Simone Fabiano, Xianjie Liu, Jianhui Hou, Feng Gao, Mats Fahlman
Summary: Energy level alignment at donor-acceptor heterojunctions is crucial for charge generation and recombination in organic photovoltaic devices. This study systematically investigates the energy level alignment and its variation at different interfaces. Contrary to previous assumptions, significant vacuum level shifts are observed at the interfaces, resulting in reduced interfacial energetic offsets and increased charge transfer state energies.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Masahiro Funahashi
Summary: The study shows that a bulk photovoltaic effect can be achieved in a chiral smectic crystal phase doped with specific additives. The polarity of the photovoltaic effect can be adjusted by changing the polarization bias. Aggregation of fullerene derivatives into microcrystals promotes hole-electron dissociation, leading to high efficiency of photocurrent generation.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Spectroscopy
Merlys Borges-Martinez, Nicolas Montenegro-Pohlhammer, Xiance Zhang, Diego E. Galvez-Aranda, Victor Ponce, Jorge M. Seminario, Gloria Cardenas-Jiron
Summary: The study demonstrates that the binding of fullerene C60, through metal or ligand, can impact the photophysical and charge transport properties of M-porphyrin/phthalocyanine, with AlTPP-C60 and ZnTPP-C60 dyads showing better performance in terms of electron injection and dye regeneration.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Optics
Shijie Jiang, Lurong Yang, Chenbo Huang, Qianqian Chen, Wei Zeng, Xiaojian She
Summary: Thin film transistor (TFT) is crucial for planar drive display technology, and operating the TFT device in a saturation regime is essential for stable light emission. This study investigates the effect of illumination on TFT saturation behavior, revealing that the drift current of photogenerated carriers can exhibit saturation behavior depending on the dominance of charges induced by gate bias or charges generated by photons. These insights contribute to the development of TFT technologies that can drive light emission at a stable current.
Article
Chemistry, Physical
Jiufeng Dong, Renchao Hu, Yujuan Niu, Liang Sun, Liuting Li, Shuai Li, Desheng Pan, Xinwei Xu, Rui Gong, Jin Cheng, Zizhao Pan, Qing Wang, Hong Wang
Summary: The interface plays a significant role in the conduction and breakdown behaviors of dielectric materials. This study focuses on the effect of the energy level structure in the filler/polymer and electrode/dielectric interface region on the breakdown strength and high-temperature energy storage performances. By incorporating wide bandgap oxide layers, this study reveals that the energy level structure of the interface region can be regulated, which introduces deep traps in the nanocomposites and increases the Schottky barrier to impede charge injection and transport. The nanocomposites exhibit enhanced dielectric constants and improved capacitive performance at elevated temperatures.
Article
Polymer Science
Washat Ware, Tia Wright, Yimin Mao, Shubo Han, Jessa Guffie, Evgeny O. Danilov, Jeromy Rech, Wei You, Zhiping Luo, Bhoj Gautam
Summary: Research shows that tuning aggregation in polymer blends can optimize charge generation, which is beneficial for the design of highly efficient organic photovoltaic devices.
Article
Chemistry, Multidisciplinary
Hong-Cheng Li, Xun Tang, Sheng-Yi Yang, Yang-Kun Qu, Zuo-Quan Jiang, Liang-Sheng Liao
Summary: By binding D/A units in space and controlling their interaction, intramolecular charge transfer is achieved which enhances the emission properties of the material. The DM-Me-B material exhibits high external quantum efficiency and low efficiency roll-off.
CHINESE CHEMICAL LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Jun-Jie Cao, Kai-Li Wang, Chong Dong, Xiao-Mei Li, Wen-Fan Yang, Zhao-Kui Wang
Summary: Utilizing TaCl5-doped SnO2 ETL can enhance open-circuit voltage and power conversion efficiency, leading to the fabrication of high-performance perovskite solar cells.
ORGANIC ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Xue-Qi Wang, Sheng-Yi Yang, Qi-Sheng Tian, Cheng Zhong, Yang-Kun Qu, You-Jun Yu, Zuo-Quan Jiang, Liang-Sheng Liao
Summary: Multi-layer pi-stacked emitters based on spatially confined D/A/D patterns have been developed to achieve high-efficiency TADF. Dual donor moieties and a single acceptor moiety are introduced to form 3D emitters, resulting in high PLQYs, small Delta E-ST, and fast RISC processes. Devices based on these emitters exhibit maximum EQEs higher than their D/A-type analogues.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Applied
Wen-Fan Yang, Jun-Jie Cao, Chong Dong, Meng Li, Qi-Sheng Tian, Zhao-Kui Wang, Liang-Sheng Liao
Summary: By introducing Catechin into the perovskite layer, oxidation was suppressed, resulting in tin-based perovskite thin films with improved performance and stability. The average power conversion efficiency of the devices increased to 5.45% with a Champion PCE of 6.02%, demonstrating potential for indoor photovoltaics with a maximum PCE of 12.81% under indoor lighting.
APPLIED PHYSICS LETTERS
(2021)
Article
Optics
Xiao Wang, Yurong Ma, Qingyao Wu, Zhenzhen Wang, Yichen Tao, Yajie Zhao, Bo Wang, Jingjing Cao, Hui Wang, Xiaoqing Cu, Hui Huang, Si Li, Xiaoyong Wang, Fengrui Hu, Mingwang Shao, Liangsheng Liao, Tsun-Kong Sham, Yang Liu, Zhenhui Kang
Summary: This study presents a method to prepare pure blue LEDs using O, N co-doped carbon dots, demonstrating excellent performance in terms of color purity, high external quantum efficiency, brightness, and current efficiency.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Physical
Guixiang Li, Zhenhuang Su, Meng Li, Feng Yang, Mahmoud H. Aldamasy, Jorge Pascual, Fengjiu Yang, Hairui Liu, Weiwei Zuo, Diego Di Girolamo, Zafar Iqbal, Giuseppe Nasti, Andre Dallmann, Xingyu Gao, Zhaokui Wang, Michael Saliba, Antonio Abate
Summary: The use of n-butylammonium acetate (BAAc) to modulate tin coordination in the crystallization process results in more compact and preferentially oriented perovskite films. Perovskite solar cells processed with BAAc show higher power conversion efficiency and improved stability, paving the way for controlled tin-based perovskite crystallization in lead-free photovoltaics.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
J. Chen, Z-K Wang, L-S Liao
Summary: This review introduces the representative and effective strategies of crystallization control and defect passivation of perovskite films, which have achieved positive results in promoting enhancement of device efficiency and stability. Furthermore, efforts on increasing the dimensional scale of the device and producing flexible devices, which have huge commercial potential, are also covered. As a result of these advanced investigations, the prospects of the commercialization of PSCs have rapidly increased.
MATERIALS TODAY NANO
(2021)
Article
Chemistry, Multidisciplinary
Shuai Yuan, Lin-Song Cui, Linjie Dai, Yun Liu, Qing-Wei Liu, Yu-Qi Sun, Florian Auras, Miguel Anaya, Xiaopeng Zheng, Edoardo Ruggeri, You-Jun Yu, Yang-Kun Qu, Mojtaba Abdi-Jalebi, Osman M. Bakr, Zhao-Kui Wang, Samuel D. Stranks, Neil C. Greenham, Liang-Sheng Liao, Richard H. Friend
Summary: The research demonstrates that using fluorene-based pi-conjugated cationic polymer blended with perovskite semiconductors can achieve efficient blue LEDs with good electroluminescence and spectral stability. The mixed halide perovskite LEDs exhibit CIE coordinates of (0.08, 0.22) and (0.12, 0.13), showcasing great potential for stable blue perovskite LEDs.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Ryota Sugimoto, Masahiro Morimoto, Shigeki Naka
Summary: The patterning of organic light-emitting diodes using blue laser irradiation was investigated. The study found that optional patterning was possible by quenching the laser irradiation part, offering a potential fabrication technique for on-demand pattern emission.
Article
Materials Science, Multidisciplinary
Mitsuyuki Shikano, Masahiro Morimoto, Shigeki Naka
Summary: This study focused on the optical properties of a low-molecular-weight boron-dipyrromethene derivative (BODIPY-Ph) and its potential application in NIR region, with an acetone solution showing high photoluminescence quantum yield and the OLED exhibiting a relatively high external quantum efficiency in the NIR region.
ORGANIC ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Seiichiro Izawa, Masahiro Morimoto, Shigeki Naka, Masahiro Hiramoto
Summary: A highly efficient OLED with low operating voltage and high quantum efficiency was achieved by utilizing upconversion (UC) transition and introducing special materials to reduce energy loss during the process.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Mohammad Mostafizur Rahman Biswas, Md Faruk Hossain, Masahiro Morimoto, Shigeki Naka, Hiroyuki Okada
Summary: Cd-free ZnCuInS/ZnS quantum dot-based light-emitting diodes (QLEDs) were fabricated using metallic sputtered ZnO as the substrate, with the oxide layer properties enhanced by substrate heating. The semiconductor properties of the ZnO layer were examined through Hall effect measurements and structural analyses. The QLED devices achieved high power efficiency, current efficiency, and external quantum efficiency under specific preparation conditions, demonstrating promising potential for practical applications.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
(2021)
Article
Materials Science, Multidisciplinary
Teppei Masuda, Masahiro Morimoto, Shigeki Naka
Summary: To reduce the driving voltage, further development of organic light-emitting diodes (OLEDs) is needed. Exciplex upconversion-type OLEDs (ExUC-OLEDs), which form exciplexes at the donor/acceptor interface, are an optimal solution. However, an unexplained phenomenon is observed in these devices that cannot be explained by simple exciton diffusion. In this study, an exciton capture layer is inserted into the emitter layer of ExUC-OLEDs to investigate the exciton diffusion mechanism. All ExUC-OLEDs emit light through triplet-triplet upconversion (TTU) and operate at more than half the applied voltage (1 V) of the emitter material's energy gap. Additionally, long-range exciton diffusion up to 40 nm is confirmed through TTU and singlet fission contributions.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Ryosuke Fukazawa, Yoshiki Maegawa, Masahiro Morimoto, Ryosuke Matsubara, Atsushi Kubono, Shigeki Naka
Summary: In this study, the hole injection in organic light-emitting diodes (OLEDs) is improved by utilizing a P(VDF/TrFE) polymer layer as a hole injection layer on the indium tin oxide (ITO) electrode surface. The device's driving voltage is lowered due to the enhanced hole injection. Additionally, the structural change in the ultrathin P(VDF/TrFE) layer significantly enhances the hole injection in OLEDs.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Seiichiro Izawa, Masahiro Morimoto, Shigeki Naka, Masahiro Hiramoto
Summary: Triplet exciton formation at an organic semiconductor interface is crucial for electronic devices and optical functions. The distribution of triplet excitons reveals that 90% of them are confined within 10 nm from the interface, leading to efficient TTA emission.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Materials Science, Multidisciplinary
Jinfei Dai, Chenjing Zhao, Jie Xu, Hossein Roshan, Hua Dong, Francesco Di Stasio, Fang Yuan, Bo Jiao, Zhaoxin Wu
Summary: In this study, the performance of perovskite nanocrystal light emitting diodes (PNC-LEDs) was enhanced through rational device structure design and the application of high-performance perovskite nanocrystal emitting layers.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Jia-Hua Yeh, Suhendro Purbo Prakoso, Leon Lukhas Santoso, Shi-Ju Chen, Bryan Chiang, Ju-Chieh Cheng, Ru-Ning Zhang, Yu-Cheng Chiu
Summary: This study demonstrates the application of a renewable material called dextrin-SMS in the production of electret filters and transistor memory. Dextrin-SMS material can maintain prolonged electrostatic charges and has a relatively wide memory window, making it suitable for the production of biodegradable face masks and green electronics.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Ahmad Telfah, Qais M. Al-Bataineh, Ahmad A. Ahmad, Rund Abu-Zurayk, Carlos J. Tavares, Johannes Etzkorn, Farzad Foadian
Summary: Polyacrylic acid complexed with polyaniline (PAA/PANI) composite materials have the potential to form organic mixed ion-electron conductive (OMIEC) films, which can be used in optoelectronic and energy storage applications. The composite films are formed through an acid-base reaction, resulting in strong electrostatic interactions and intermolecular hydrogen bonds between PANI and PAA. The separation of PANI-rich domains from PAA-rich matrix in the composite films is observed. The electrical conductivity of the composite films is higher when the content of PANI is 33 wt%, due to the high ionic-electronic coupling at the interface between phase-separated regions.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Min-Chih Hou, Dian Luo, Yu-Ting Huang, Shun-Wei Liu, Chin-Wei Lu, Chih-Hao Chang, Hai-Ching Su
Summary: Light-emitting electrochemical cells (LECs) have great potential for novel emission applications, but their relatively low device efficiency hinders their competitiveness with other emission technologies. A study finds that increasing the concentration of small TiO2 nano-particles in the diffuser film can enhance light extraction and improve the device efficiency of LECs.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Qiaoli Niu, Yao Xu, Jun Yang, Wei Hua, Baoxiang Chai, Zequan Zhang, Yuhui Ma, Wenjin Zeng, Ana Flavia Nogueira, Ruidong Xia
Summary: By introducing CPB as a defect passivation agent in the perovskite precursor solution, the optoelectronic properties of perovskite films can be significantly improved and non-radiative carrier recombination can be effectively suppressed. CPB-modified perovskite solar cells exhibit lower trap-state density and stronger carrier migration capability, leading to enhanced power conversion efficiency and stability.
ORGANIC ELECTRONICS
(2024)
Article
Materials Science, Multidisciplinary
Hulya Ozturk Dogan, Fatma Yildirim, Zeynep Orhan, Ali Ben Ahmed, Mostefa Benhaliliba, Sakir Aydogan
Summary: In this study, efficient self-powered visible and UV photodetectors based on hybrid organic-inorganic materials were demonstrated. The photodetectors showed excellent UV detecting capability and good photoresponsivity.
ORGANIC ELECTRONICS
(2024)
