Article
Chemistry, Multidisciplinary
Yasir Siddique, Kyungnan Son, Tanka Raj Rana, Syed Dildar Haider Naqvi, Pham Minh Hoang, Asmat Ullah, Huyen Tran, Sang Min Lee, Sungjun Hong, Seung Kyu Ahn, Inyoung Jeong, SeJin Ahn
Summary: A breakthrough in the use of N,N-dimethylformamide (DMF) molecular ink has led to the fabrication of highly efficient and low bandgap CuIn(S,Se)(2) (CISSe) solar cells. It has been found that DMF ink can be processed in air under certain optimized conditions, without sacrificing device performance. This opens up new possibilities for commercialization while retaining the benefits of solution-based routes.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Harold O. Lee, LaRico J. Treadwell, Sam-Shajing Sun
Summary: One of the greatest advantages of organic/polymeric semiconductors is their tunability, and chemical doping has been shown to be a quick and cost-effective method. In this study, the relationship between the frontier orbital levels of poly(3-hexylthiophene-2,5-diyl) (P3HT) and various molecular dopants was investigated. The results revealed that as the LUMO level of the dopant increases, the electrical conductivity decreases, which can be attributed to the increased energy barrier for electron transfer.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Chen Li, Ke Liu, Dequan Jiang, Huacai Yan, En Chen, Yingying Ma, Haoming Cheng, Ting Wen, Binbin Yue, Yonggang Wang
Summary: This study demonstrates the pressure-induced multi-transition of both structure and physical properties in violet phosphorus, a novel phosphorus allotrope. Violet phosphorus exhibits emergent insulator-metal transition, superconductivity, and dramatic switching from positive to negative photoconductivity under compression. The resistance of violet phosphorus shows a sudden drop, and piezochromism and suppression of photoluminescence are observed upon compression. The sample irreversibly transforms into black phosphorus with different physical properties after decompression.
Article
Chemistry, Applied
Yuzhang Xiao, Mengzhen Du, Qingling Nie, Bo Xiao, Qiang Guo, Chuanqi Dong, Yanfang Geng, Qing Guo, Erjun Zhou
Summary: The study investigates the modification of side chain structures to improve the photovoltaic performance of A(2)-A(1)-D-A(1)-A(2) type NFAs with P3HT. The results show that fine-tuning the middle D unit significantly influences the intermolecular interaction, while modulation of the side chains at A(1) and A(2) units can enhance power conversion efficiencies.
Article
Materials Science, Multidisciplinary
Md Tarik Hossain, Tadasha Jena, Subhankar Debnath, P. K. Giri
Summary: In this study, ultrathin Bi2O2Se nanostructures were synthesized through a scalable chemical reaction process and their structural and optoelectronic functionalities were modulated through vacuum annealing. It was found that vacuum annealing improved the crystal quality and led to a conversion from negative persistent photoconductivity to positive photoconductivity. The defects in the nanocrystals also played a key role in modulating the wavelength-dependent photoconductivity. The research highlights the importance of vacuum annealing in improving the crystallinity and the practical applications of Bi2O2Se nanostructures in optoelectronics.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Fang Yu, Junyuan Tian, Fengying Jiang, Yunjie Liu, Chaohai Li, Chengwei Wang, Zhong Lin Wang, Kailiang Ren
Summary: In this study, vertically aligned NaNbO3 nanotubes (NN-NT) with trapezoidal shapes, containing orthorhombic and monoclinic phases, were successfully prepared. The NN-NT/epoxy composite film exhibited excellent flexoelectric properties due to lattice distortion caused by defects and irregular shape. The flexibility-enhanced photovoltaic (FPV) effect was observed, with the flexoelectric coefficient (mu(12)') being approximately 5-fold higher than pure epoxy film and the photovoltaic current of the NN-NT/epoxy composite film increasing from 39.9 to 71.8 nA·cm(-2) in the direction of spontaneous polarization when bent upward. The flexoelectric effect of the NN-NT/epoxy composite film could modulate the photovoltaic response by increasing it by 80% or reducing it to 65% of the original value. This work provides a new idea for further exploration in efficient and lossless ferroelectric memory devices.
Article
Materials Science, Multidisciplinary
Uzma Saleem, Muhammad Tariq, Muhammad Nadeem, Shahid Hussain, Muhammad Ali Khan, Hafiz Muhammad Asif, Ajaz Hussain, Gaber A. M. Mersal, Islam H. El Azab
Summary: In this study, two new efficient and ecofriendly hybrids based on Polyoxometalates-porphyrin were synthesized and their thin films were designed for use in light conversion devices. The optical and electrical properties of the films were analyzed, and it was found that they show promising potential in optoelectronic applications such as solar cells and photovoltaic cells.
Article
Nanoscience & Nanotechnology
Fei Shuang, Zhaohe Dai, Katerina E. Aifantis
Summary: Graphene can strengthen the Ni matrix not only through interface hardening or precipitate hardening, but also through a continuous transition between the two mechanisms, depending on the behavior of the graphene. This transition from interface hardening to precipitate hardening affects the strengthening effect on the materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Yixuan Chen, Yinying Zhang, Ruiming Lu, Trevor P. Bailey, Ctirad Uher, Pierre F. P. Poudeu
Summary: This study investigates the correlation between phase composition, microstructure, and electronic transport behavior in Cu2Se-CuInSe2 binary hybrid system. The researchers observed an atypical electronic behavior in the hierarchical composites, which could be rationalized by the formation of an inter-band within the band gap. This finding suggests a new strategy to modulate the electronic structure of semiconductor composites and develop materials with interactive and stimuli-responsive multifunctional properties.
NANOSCALE ADVANCES
(2022)
Article
Materials Science, Ceramics
Anu Katiyar, Nishant Kumar, R. K. Shukla, Anchal Srivastava
Summary: This study synthesized undoped, doped, and co-doped vertically aligned zinc oxide nanorods (NRs) using a sonicated sol-gel immersion method and investigated the structural, morphological, optical, and photoconductivity properties of NRs with different dopants. The results showed that the incorporation of Fe improved the growth of NRs, while the incorporation of Ag had a detrimental effect. Co-doping enhanced the light harvesting efficiency and reduced the persistent photoconductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
M. V. Durnev
Summary: In this study, we theoretically investigate the transverse photoconductivity induced by circularly and linearly polarized radiation in a two-dimensional electron gas. Our microscopic theory is based on the analytical solution of the Boltzmann equation for different electron spectra and scattering mechanisms. We show that the transverse electric current is significantly enhanced at certain frequencies, and the excitation spectrum and current direction depends on the scattering mechanism at higher frequencies.
Article
Chemistry, Physical
Patrick Beer, Paul M. Reichstein, Konstantin Schoetz, Dominic Raithel, Mukundan Thelakkat, Juergen Koehler, Fabian Panzer, Richard Hildner
Summary: In this study, individual nanoscale aggregates of the conjugated polymer P3HT were examined using photoluminescence spectroscopy to reveal varying levels of structural and electronic disorder. The findings indicate that the P3HT aggregates exhibit H-type nature and undergo partial planarization upon cooling from room temperature to low temperature. These spectral changes are indicative of intra-chain torsional disorder, which ultimately contributes to both intra- and inter-aggregate disorder.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Chemistry, Multidisciplinary
Sikandar Aftab, Muhammad Arslan Shehzad, Hafiz Muhammad Salman Ajmal, Fahmid Kabir, Muhammad Zahir Iqbal, Abdullah A. Al-Kahtani
Summary: Researchers have discovered mechanical distortion-induced bulk photovoltaic behavior in MoTe2 material, caused by phase transition and broken inversion symmetry. A large bulk photovoltaic response is anticipated in the absence of an external electric field, which has the potential to improve the efficiency of converting light energy.
Article
Chemistry, Applied
Yuzhang Xiao, Zehua He, Hai Jiang, Kunyuan Zuo, Qiang Guo, Yanfang Geng, Yingliang Liu, Erjun Zhou
Summary: The development of A-DA'D-A non-fullerene acceptors (NFAs) has driven the progress of organic solar cells (OSCs), especially those using D-A type polymers as electron donors. However, the use of A-DA'D-A NFAs to accelerate the development of P3HT devices is still uncertain, as only limited BT-based A-DA'D-A molecules have been used in P3HT-based devices.
Article
Materials Science, Multidisciplinary
S. Nithiananth, K. Silambarasan, T. Logu, S. Harish, R. Ramesh, C. Muthamizhchelvan, M. Shimomura, J. Archana, M. Navaneethan
Summary: The study focused on preparing low-cost counter electrodes for DSSCs, utilizing Cu- (In, Co, Ni, Mn)-Se-2 material, with CuNiSe2 exhibiting the lowest charge transfer resistance and showing superior performance in terms of photovoltaic efficiency.
Article
Chemistry, Multidisciplinary
Weijie Chen, Dong Li, Xu Chen, Haiyang Chen, Shuo Liu, Haidi Yang, Xinqi Li, Yunxiu Shen, Xuemei Ou, Yang (Michael) Yang, Lin Jiang, Yaowen Li, Yongfang Li
Summary: Constructing monolithic two-terminal tandem solar cells using complementary properties of various photoactive layers, and improving charge recombination efficiency through surface reconstruction of all-inorganic perovskite, resulted in high power conversion efficiency and enhanced stability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Weiqing Chen, Min Zhou, Yang Liu, Xue Yu, Chaojie Pi, Ze Yang, Hao Zhang, Zhichao Liu, Ting Wang, Jianbei Qiu, Siu Fung Yu, Yang (Michael) Yang, Xuhui Xu
Summary: A novel perovskite polymer-ceramics scintillator with high transparency and quality is designed for flexible and refreshable X-ray imaging, achieved through a nucleation inhibition strategy. This scintillator-based detector boasts a high detection limit and spatial resolution, overcoming the long operation lifetime issue of perovskites-based scintillators.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lei Ye, Xuehui Xu, Siyu He, Yanping Liu, Yizheng Jin, Yang Michael Yang, Haiming Zhu
Summary: This study investigates the triplet sensitization of monolayer semiconductors and its potential for enhancing optoelectronic applications. The results show that triplet energy or charge can be transferred to the monolayer semiconductors, resulting in photoluminescence enhancement and long-lived charge separation. These findings demonstrate the great promise of molecular triplets in sensitizing 2D monolayer semiconductors and provide guidance for achieving enhanced optoelectronic applications.
Article
Chemistry, Multidisciplinary
Peng Ran, Lurong Yang, Tingming Jiang, Xuehui Xu, Juan Hui, Yirong Su, Cuifang Kuang, Xu Liu, Yang (Michael) Yang
Summary: Conventional X-ray imaging lacks spectral information and is not easily applied in large-area flat-panel X-ray imaging (FPXI). By designing multilayer stacked scintillators, multispectral X-ray imaging can be achieved, providing a facile and effective strategy for large-area FPXI.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Juan Hui, Peng Ran, Yirong Su, Lurong Yang, Xuehui Xu, Tianyu Liu, Yang Michael Yang
Summary: Lead-free copper halide scintillators have great potential in X-ray detection and imaging, but their imaging resolution is limited due to the lack of a scintillation waveguide. This study presents a solution synthesis route for Cs3Cu2I5 nanowire arrays with high spatial resolution, providing a convenient and facile method for high-resolution X-ray imaging.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Optics
Tianyu Liu, Chenying Yang, Zhuping Fan, Xu Chen, Zeng Chen, Yirong Su, Hanbo Zhu, Fangling Sun, Tingming Jiang, Wenjuan Zhu, Weidong Shen, Jianjun He, Haiming Zhu, Xu Liu, Yang (Michael) Yang
Summary: This study presents the design and fabrication of a new type of metal-dielectric microcavity PeLED, which exhibits a narrow spectrum and enhanced forward emission directionality. This has significant implications for expanding the color space in display applications and other related device designs.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Siyuan Huang, Yongpin Chen, Yang (Michael) Yang, Wei E. Sha
Summary: In this study, a new figure of merit is proposed to accurately describe the light emission process by simultaneously using direction-dependent Purcell factor and transmittance coefficient.
Article
Materials Science, Multidisciplinary
Kaiyu Xia, Peng Ran, Wenwen Wang, Jiewen Yu, Gaopeng Xu, Kun Wang, Xiaodong Pi, Qingquan He, Yang (Michael) Yang, Jun Pan
Summary: In this study, large-area flexible scintillation screen films with good mechanical stability and homogeneity were successfully prepared. The photoluminescence quantum yield of the film exceeded 85%, and it exhibited excellent scintillation performance for X-ray imaging applications.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Siyuan Huang, Chun-Hsiao Kuan, Yue Tian, Xu Chen, Zeng Chen, Cheng-Hung Hou, Xuehui Xu, Xiangyang Tang, Jing-Jong Shyue, Haiming Zhu, Tingming Jiang, Yang (Michael) Yang
Summary: This study utilizes a small amount of 2D perovskite to regulate the crystallization process of 3D tin-lead alloyed perovskite, resulting in high quality film with lower non-radiative recombination and better stability. The achieved champion efficiency of 14.6% sets a new record for inorganic tin-lead perovskite solar cells.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Peng Jin, Yingjie Tang, Xuehui Xu, Peng Ran, Yan Wang, Yue Tian, Yong Huang, Bowen Zhu, Yang (Michael) Yang
Summary: A novel hybrid X-ray detector device structure was designed, in which lead halide perovskite mainly acted as an X-ray sensitizer to activate the conduction channel of indium oxide (In2O3). The actual electrical signal was conducted and collected in a lateral metal-oxide device, resulting in improved performance compared to traditional detectors.
Article
Nanoscience & Nanotechnology
Yan Wang, Xinyao Shan, Yingjie Tang, Tianyu Liu, Binghan Li, Peng Jin, Kun Liang, Dingwei Li, Yang Michael Yang, Huaibin Shen, Bowen Zhu, Botao Ji
Summary: Developing advanced patterning techniques for colloidal nanocrystals is crucial for high-performance electronic/optoelectronic devices. The researchers have developed a direct method to pattern functional nanocrystals without the need for complicated photolithography processes or photosensitive molecules. The obtained patterns allow for postpatterning ligand exchange, enabling the fabrication of thin-film transistors and light-emitting diodes with enhanced performances.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Biao Li, Xuehui Xu, Yuxin Yao, Pengjie Hang, Chenxia Kan, Ying Wang, Yiqiang Zhang, Yang (Michael) Yang, Deren Yang, Xuegong Yu
Summary: This study investigates the influence of the dipole moment of A-site ions on the migration of iodine ions in perovskite films. It finds that a decrease in the dipole moment of A-site ions leads to a decrease in the activation energy of iodine ions. Therefore, increasing the dipole moment of A-site ions can be an effective strategy for suppressing iodine migration in perovskite films and enhancing the long-term stability of PSCs.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Peng Ran, Xinya Chen, Zeng Chen, Yirong Su, Juan Hui, Lurong Yang, Tianyu Liu, Xiangyang Tang, Haiming Zhu, Xiao-Jian She, Yang (Michael) Yang
Summary: Copper-based halides have shown promise as scintillator materials for X-ray imaging. CsCu2I3 exhibits perfect spectral compatibility and fast decay properties, making it suitable for CT X-ray imaging and allowing for non-planar imaging.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Dianxing Ju, Ming Zhou, Pen Ran, Huifang Li, Yang Michael Yang, Tingming Jiang
Summary: This study designed novel Cu(I) halides with lower melting points and improved moldability. The investigation also demonstrated the reversal of aging and luminescence-quenching phenomena through controlled heat treatment. The resulting crystals exhibited broadband emission and high photoluminescence quantum yields. The melt processability of these materials makes them suitable for various practical applications, especially in X-ray imaging.
ACS MATERIALS LETTERS
(2023)
Article
Optics
Ma Wenbo, Kuang Cuifang, Liu Xu, Yang Yang
Summary: Halide perovskite and perovskite-like materials have shown great potential in X-ray detection and imaging due to their excellent performance. This review summarizes the fundamental principles, advances, and future prospects of X-ray detection and imaging based on novel metal halide semiconductors and scintillators.
ACTA OPTICA SINICA
(2022)
