Article
Materials Science, Multidisciplinary
Vedaste Uwihoreye, Zhenni Yang, Jia-Ye Zhang, Yu-Mei Lin, Xuan Liang, Lu Yang, Kelvin H. L. Zhang
Summary: In this study, Ta-doped SnO2 thin films were fabricated via a low-cost sol-gel spin coating method, achieving high electrical conductivity and high optical transparency. The optical bandgaps of the films increased due to Ta doping, however, a bandgap shrinkage was also observed due to many-body interactions. These films exhibit both transparency and conductivity, providing a new platform for optoelectronic and solar cell applications.
SCIENCE CHINA-MATERIALS
(2023)
Article
Materials Science, Ceramics
R. Senthil Kumar, K. H. Sai Priyanka, A. K. Khanra, R. Johnson
Summary: A facile methodology of synthesizing highly reactive nano Y2O3 powders to fabricate submicron yttria ceramics with superior optical and mechanical properties is reported. The sintered samples achieved high IR transmissions and enhanced mechanical properties with submicron grain sizes.urther characterization for their thermal properties was conducted on sintered and HIPed Y2O3 specimens.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Rinu Abraham Maniyara, Christina Graham, Bruno Paulillo, Yu Bi, Yu Chen, Gervasi Herranz, David E. Baker, Prantik Mazumder, Gerasimos Konstantatos, Valerio Pruneri
Summary: The study introduces a simple technique to reduce reflection in the near-infrared range for ITO and achieve high transmission with optimized parameters. This allows for high transmission at telecommunication wavelengths while maintaining high electrical conductivity.
Article
Optics
Jiangshan Zheng, Huaibin Zheng, Yongqiang Pang, Bingyue Qu, Zhuo Xu
Summary: The study presents a novel visible-light transparent, microwave broadband absorbing metamaterial. The designed structure utilizes indium tin oxide (ITO) conductive film patch arrays of different sizes, achieving a reflection coefficient <= -10 dB from 2.2 to 18 GHz in simulations. It demonstrates good optical transparency, broadband radar absorption capability, and potential applications in multi-spectrum stealth and electromagnetic compatibility.
Article
Materials Science, Multidisciplinary
Xiaomeng Fan, Shengrui Xu, Weiguo Liu, Hongchang Tao, Huake Su, Linlin Hu, Jincheng Zhang, Yue Hao
Summary: This research reports a method of using ITO/Gr/ITO structure as a transparent conductive layer (TCL) to improve the current spreading of UV-LEDs. The ITO/Gr/ITO structure is obtained through RF magnetron sputtering and wet-transfer, with Raman spectroscopy measurement confirming the presence of single layer and few layers of graphene. The optimized LEDs with ITO/Gr/ITO TCL have significantly lower forward voltage, increased light output power (LOP) and wall plug efficiency (WPE) compared to conventional LEDs with ITO TCL. Light distribution analysis shows that the introduction of ITO/Gr/ITO structure as TCL is an effective method to improve the current spreading in UV-LEDs.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Liwei Che, Jianmin Song, Jinzheng Yang, Xiaoyang Chen, Junjie Li, Nan Zhang, Shaopeng Yang, Yanfeng Wang
Summary: In this study, F, Cl, and Ga co-doped ZnO films were deposited on a glass substrate using the sol-gel spin-coating method. The effects of F-doping content on the structural, morphological, electrical, and optical properties of the films were investigated. The F, Cl, and Ga co-doped ZnO film with a doping ratio of 2% showed the best photoelectric performance, with high transmittance and a wide optical band gap.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Vivekanandan Raman, Ji-Eun Lee, Han-Ki Kim
Summary: To improve the flexibility of transparent conductive electrodes (TCEs), multi-stacked ITO/PEDOT:PSS hybrid superlattice (IxPy) films were designed and applied in flexible polymer-dispersed liquid crystal (PDLC), foldable thin-film heaters (TFHs), and flexible perovskite solar cells (PSCs). The optimized I6P5 film showed excellent electrical and optical properties, and the I6P5-based PDLC, TFHs, and PSCs demonstrated promising performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
G. Ramanathan, K. R. Murali
Summary: Various metal oxide semiconductors, especially those exploiting the junction between p-type and n-type semiconductors, play a significant role in the field of electronics. Indium oxide doped with tin (ITO) is a commonly used substrate material due to its low resistivity and high optical transmittance in the visible region. In this study, ITO films with different tin concentrations were prepared using the acrylamide sol gel dip coated method, and their optical properties were investigated.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Physics, Applied
Imran Sutan Chairul, Atsushi Echimoto, Ryutaro Tazawa, Kei-ichiro Murai, Toshihiro Moriga
Summary: Transparent diodes were fabricated by layering a Ga-Sn-O (GTO) film onto an In2O3:Sn (ITO) film using a facing-targeted DC sputtering method. When a GTO film containing about 25% gallium was deposited on the surface of the conductive ITO film at room temperature, a bilayer film was obtained. The rectification characteristics of the bilayer film were approximately 0 and 3.8 μA/V for negative and positive voltages, respectively, but increased up to 68.3 μA/V in the positive voltage applied region after annealing at 200℃.
MODERN PHYSICS LETTERS B
(2023)
Article
Chemistry, Analytical
Jianchen Cai, Jiaxi Jiang, Jinyun Jiang, Yin Tao, Xiang Gao, Meiya Ding, Yiqiang Fan
Summary: This study proposed a method for fabricating thin, film-based, transparent, and flexible digital microfluidic devices and conducted a series of characterizations. The fabricated digital microfluidic device has a total thickness of less than 200 µm and is nearly transparent in the visible range, enabling droplet manipulation.
Article
Physics, Applied
Shijun Ji, Hailin Ren, Chenguang Zhang, Ji Zhao, Han Wu, Handa Dai
Summary: An optically transparent metamaterial absorber with polarization insensitivity and wide-angle absorption is proposed. The absorber is composed of an indium tin oxide resistive film and a low-loss substrate, achieving an absorption rate of more than 97% in the range of 6.54-18.66 GHz. The design provides a new idea for future applications by using a low-resistivity resistive film as the frequency-selective surface.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yilun Jiang, Ji'an Chen, Zhengyang Du, Fei Liu, Yuyuan Qin, Peng Mao, Min Han
Summary: ITO nanoparticles were formed using a magnetron plasma gas aggregation cluster source, with their morphology dependent on the discharging power of magnetron sputtering. The nanoparticles changed from rough spheroids to multi-branch structures with different discharging powers. Transparent conductive ITO nanoparticle films were successfully fabricated with controlled thickness and exhibited tunable electron conduction by changing the deposition thickness.
Article
Materials Science, Paper & Wood
Seunghwan Noh, Huijin An, Youngjun Song
Summary: This study demonstrates a simple and fast method of fabricating transparent conductive nitrocellulose using nitrocellulose membrane and solvent evaporation process. By filtering and processing with various materials, a nonporous TCNC membrane with good optical and electrical performances can be obtained, suitable for various electronic devices.
Article
Chemistry, Physical
Hehe Zhang, Jan Mischke, Wolfgang Mertin, Gerd Bacher
Summary: This paper provides an overview of the current status of graphene-based transparent conductive electrodes in GaN-based LEDs. It focuses on manufacturing progress and the resulting properties of the fabricated devices, discussing the impact of graphene-based transparent conductive electrodes on current spreading and contact resistance, as well as future challenges and perspectives on the use of graphene in GaN-based LEDs.
Article
Nanoscience & Nanotechnology
Bastian Waduge Naveen Harindu Hemasiri, Jae-Kwan Kim, Ji-Myon Lee
NANO-MICRO LETTERS
(2018)
Article
Nanoscience & Nanotechnology
Bastian Waduge Naveen Harindu Hemasiri, Jae-Kwan Kim, Ji-Myon Lee
NANO-MICRO LETTERS
(2018)
Article
Nanoscience & Nanotechnology
Naveen Harindu Hemasiri, Samrana Kazim, Laura Calio, Sanghyun Paek, Manuel Salado, Gianluca Pozzi, Luis Lezama, Mohammad Khaja Nazeeruddin, Shahzada Ahmad
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Murat Onur Yildirim, Elif Ceren Gok, Naveen Harindu Hemasiri, Esin Eren, Samrana Kazim, Aysegul Uygun Oksuz, Shahzada Ahmad
Summary: A library of metal oxide-conjugated polymer composites was prepared for hole selective layers in perovskite solar cells fabrication, and machine learning approaches were used to predict and compare their performances. Different composites showed different suitable models and performance scores according to the evaluation models. Machine learning can be a pioneering prediction model for the PSCs performance and its validation.
Correction
Materials Science, Multidisciplinary
Abolfazl Ghaderian, Meenakshi Pegu, Naveen Harindu Hemasiri, Peng Huang, Shahzada Ahmad, Samrana Kazim
Summary: This study investigates the impact of fluorine atoms on a dopant-free hole-selective layer based on triphenylamine. The results demonstrate that the introduction of an appropriate amount of fluorine atoms can enhance the photoelectric conversion efficiency and stability of the layer, suggesting its potential application in perovskite solar cells.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Abolfazl Ghaderian, Meenakshi Pegu, Naveen Harindu Hemasiri, Peng Huang, Shahzada Ahmad, Samrana Kazim
Summary: By rationally designing dopant-free HTL and incorporating fluorinated arms on the core through molecular engineering, the stability and cost-effectiveness of PSCs can be substantially improved. The designed fluorinated HTL, FOMePh, showed high efficiency in PSCs and performed comparably to doped Spiro-OMeTAD, but at a lower cost.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Hassen Dhifaoui, Naveen Harindu Hemasiri, Walid Aloui, Abdelaziz Bouazizi, Samrana Kazim, Shahzada Ahmad
Summary: The study on perovskite solar cells (PSCs) reveals that planar PSCs with P3HT as hole transport layer exhibit high efficiency, while PSCs without HTL show significant hysteresis. Investigation on the electrical response of PSCs indicates the appearance of negative capacitance in low frequency regime, which is attributed to interfacial interactions between migrating ions and metal contact.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Energy & Fuels
Naveen Harindu Hemasiri, Laura Calio, Meenakshi Pegu, Samrana Kazim, Shahzada Ahmad
Summary: Interface engineering with an organic semiconductor as an interfacial layer is proposed to improve the performance of perovskite solar cells. The organic semiconductor enhances hole mobility and electrical conductivity through π-conjugation, and effectively suppresses detrimental charge recombination. Significant performance enhancement is achieved using this approach.
Article
Energy & Fuels
Elif Ceren Gok, Murat Onur Yildirim, Muhammed P. U. Haris, Esin Eren, Meenakshi Pegu, Naveen Harindu Hemasiri, Peng Huang, Samrana Kazim, Aysegul Uygun Oksuz, Shahzada Ahmad
Summary: The study successfully predicted the performance parameters of solar cells using machine learning technology, confirming the experimental data and indicating that this technology can help advance the commercialization of perovskite solar cells.
Article
Energy & Fuels
Hassen Dhifaoui, Naveen Harindu Hemasiri, Hanadi Mehdi, Abdelaziz Bouazizi, Samrana Kazim, Shahzada Ahmad
Summary: Charge selective layers, especially the hole transport layer (HTL), play an essential role in determining the performance of perovskite solar cells (PSCs). The influence of HTL is even more significant in inverted PSCs, as it affects both the performance and crystallization process of the perovskite deposition. Through measuring the low-frequency impedance responses of inverted PSCs, the photo-induced charge transfer dynamics and negative chemical inductor features at low frequencies were deciphered.
Article
Energy & Fuels
Abolfazi Ghaderian, Naveen Harindu Hemasiri, Shahzada Ahmad, Samrana Kazim
Summary: The 3D-halide perovskite-based solar cells have shown impressive power conversion efficiency. This study explores the use of a common salt, tetra-n-butyl ammonium hexafluorophosphate (TBAPF), as a passivating agent to improve the efficiency and stability of the perovskite solar cells.
Article
Chemistry, Physical
Muhammad Ashraf, Naveen Harindu Hemasiri, Samrana Kazim, Nisar Ullah, Majad Khan, Saheed Adewale Ganiyu, Khalid R. Alhooshani, Muhammad Nawaz Tahir, Shahzada Ahmad
Summary: Interfacial engineering plays an important role in enhancing the performance and stability of perovskite solar cells (PSCs) by reducing non-radiative recombination and improving the moisture resistance. This study focuses on the synthesis and characterization of 2D polymeric carbon nitride-based materials as interfacial layers in inverted PSCs. These interfacial layers effectively suppress the redox reaction between Ni3+ and organic cations in perovskites, suppress interfacial charge accumulation, and reduce non-radiative recombination, leading to improved stability and higher device performance.
SUSTAINABLE ENERGY & FUELS
(2023)
Article
Chemistry, Physical
Mohd Taukeer Khan, Naveen Harindu Hemasiri, Samrana Kazim, Shahzada Ahmad
Summary: The study revealed two different charge carrier activation processes in triple cation-based PSCs, one caused by the migration of halide anions at high temperatures, while the other resulted from the trapping/de-trapping of electronic charges from shallow traps at low temperatures. The trap density of states in triple cation-based perovskites was found to be significantly lower than that of single cation-based perovskites, while the charge carrier mobility was higher.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Materials Science, Multidisciplinary
Naveen Harindu Hemasiri, Samrana Kazim, Shahzada Ahmad
Summary: This study introduces the use of 2D-WS2 as an interfacial layer in perovskite solar cells to enhance charge extraction and transfer dynamics, leading to improved device performance.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Chemistry, Physical
Naveen Harindu Hemasiri, Samrana Kazim, Shahzada Ahmad
