Article
Multidisciplinary Sciences
Mahmoud H. Elshorbagy, Pablo A. Sanchez, Alexander Cuadrado, Javier Alda, Oscar Esteban
Summary: Incorporating an optimized nano-dimer structure into a-Si:H ultra-thin solar cells can significantly enhance the deliverable short-circuit current and reduce the total reflectance by about 50%. The nano-dimer structure made of high-index refractive material like GaP plays a key role in efficiently scattering light and increasing absorption in the active layer.
SCIENTIFIC REPORTS
(2021)
Review
Chemistry, Multidisciplinary
Jian Chen, Ge Song, Shan Cong, Zhigang Zhao
Summary: Resonant-cavity-enhanced electrochromic materials and devices, a new trend in electrochromics, show significant potential for multicolor characteristics, fast response times and long cycling lifetimes. This review summarizes the progress and applications of multicolor electrochromic materials and devices based on different types of optical resonators.
ADVANCED MATERIALS
(2023)
Article
Physics, Multidisciplinary
Chen Yue, Xian-Sheng Tang, Yang-Feng Li, Wen-Qi Wang, Xin-Xin Li, Jun-Yang Zhang, Zhen Deng, Chun-Hua Du, Hai-Qiang Jia, Wen-Xin Wang, Wei Lu, Yang Jiang, Hong Chen
Summary: This study focused on the optical absorption process within the active region of semiconductor materials and observed a new abnormal phenomenon beyond traditional theories, providing a new theoretical basis for the design of optoelectronic devices.
Article
Chemistry, Multidisciplinary
Xiangdong Guo, Ning Li, Chenchen Wu, Xiaokang Dai, Ruishi Qi, Tianyu Qiao, Tuoyi Su, Dandan Lei, Nishuang Liu, Jinlong Du, Enge Wang, Xiaoxia Yang, Peng Gao, Qing Dai
Summary: Metallic MXene micro/nanostructures with plasmon resonances can enhance the electromagnetic absorption. By controlling the interlayer distance and layer number, the desired electromagnetic absorption can be achieved at a specific frequency. These findings provide guidance for the design of advanced ultrathin electromagnetic absorption materials.
ADVANCED MATERIALS
(2022)
Article
Optics
Mingyue Guan, Connie Chang-Hasnain
Summary: Two novel top mirror designs of high contrast gratings are proposed for resonant-cavity enhanced photodetectors operating at 940 nm. The designs demonstrate different full-width half-maximum (FWHM) values by varying the grating periods. A broadband HCG design improves manufacturing cost and achieves near unity quantum efficiency (QE), while a resonator HCG design results in a new splitting responsivity spectrum with a high on-off ratio, showing potential applications in ternary systems, polarization dichroism or diattenuation, and optical switches.
Article
Optics
Qiansen Xie, Huajun Feng, Shangliang Wu, Xu Liu, Zhihai Xu
Summary: In this study, a thin device with large areas is demonstrated, showing strong omnidirectional absorption and wide-angle absorption. The device achieves a high absorption rate of up to 99% across the visible spectrum and has potential applications in solar thermophotovoltaics and vehicle LiDAR.
Article
Materials Science, Multidisciplinary
Virendrakumar G. Deonikar, John Marc C. Puguan, Hern Kim
Summary: This study investigates the Physico-chemical and Localized Surface Plasmon Resonance (LSPR) effects of Ag nanoparticles on WO3 center dot 0.33H(2)O thin films, leading to enhanced electrochromic performance. The hexagonal-snowflakes like WO3 center dot 0.33H(2)O/Ag(x%) nanohybrids showed significant improvement in optical modulation and coloration-bleaching time compared to pure WO3 center dot 0.33H(2)O films, thanks to improved electrical conductivity and intercalation-deintercalation pathways facilitated by Ag nanoparticles. Overall, the enhancement in electrochromic activity is attributed to the LSPR effect and tuned physical, chemical, and structural properties of the nanohybrids.
Article
Crystallography
Indu Aravind, Yu Wang, Zhi Cai, Lang Shen, Bofan Zhao, Sisi Yang, Yi Wang, Jahan M. Dawlaty, George N. Gibson, Ernest Guignon, Nathaniel C. Cady, William D. Page, Arturo Pilar, Stephen B. Cronin
Summary: A systematic theoretical study was conducted on surface plasmon resonance in different metallic grating structures using computational electromagnetic tools. The research identified corrugation parameters for maximum field enhancement and optimized the absorption and radiation losses to maximize the field enhancement. Results showed that Ag and Au had the best overall field enhancement, while Pt had the worst performance.
Article
Physics, Applied
Jonathan L. Bryan, Joe V. Carpenter, Zhengshan J. Yu, Ashling (Mehdi) Leilaeioun, Jianwei Shi, William Weigand, Kathryn C. Fisher, Zachary C. Holman
Summary: Contacts implemented on the rear side of silicon heterojunction solar cells, such as a-Si:H(i)/a-Si:H(n)/Al and a-Si:H(i)/a-Si:H(p)/Al, demonstrate promising performance in electrical test structures and full-area solar cells. The stability and performance of the contacts are affected by annealing temperature and thickness of doped a-Si:H layers. Transmission electron microscopy and energy-dispersive x-ray spectroscopy analysis help to explain Al-Si interactions at the interfaces and understand the limiting materials properties affecting contact stability.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Mohammadali Razeghi, Merve Ustuncelik, Farzan Shabani, Hilmi Volkan Demir, T. Serkan Kasirga
Summary: The photo-bolometric effect is observed in individual silver nanowires and networks of such nanowires, leading to negative photoconductance. The effect is caused by the local heating resulting from surface plasmon polaritons or plasmons created at the nanowire-metal contact junctions. Decorating the silver nanowires with silver nanoparticles enhances this plasmon-assisted bolometric effect.
NANOSCALE HORIZONS
(2022)
Article
Optics
Chen-Yang Chang, Radhika Bansal, Kuo-Chih Lee, Greg Sun, Richard Soref, H. H. Cheng, Guo-En Chang
Summary: A study reported on planar GeSn resonant-cavity-enhanced photodetectors on an SOI platform for SWIR integrated photonics. Utilizing the SOI platform and a deposited SiO2 layer as reflectors to enhance optical responsivity with a vertical cavity. Incorporating Sn into the GeSn active layer extended the photodetection range.
Article
Engineering, Electrical & Electronic
Manoj Kumar, Sushil Kumar
Summary: This study used AFORS-HET numerical simulation software to study Titanium dioxide silicon heterojunction (TiO2-SHJ) solar cells. Optimization of thickness, doping concentration, silicon surface texturing, and defect states were carried out to achieve the optimum efficiency. Experimentally, a maximum efficiency of 14.16% was achieved. Using optimized cell parameters, a maximum efficiency of 24.13% was achieved for pyramid textured TiO2-SHJ solar cells. The impact of defect states on performance was also investigated.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Optics
Toyonori Matsuda, Isao Tsunoda, Masanori Nagata, Takao Kawakita, Shumpei Noguchi
Summary: We experimentally investigated the polarization property of specularly reflected light from an anodic porous alumina membrane coated with a gold thin film. We found a rapid change in the normalized Stokes parameter s3 of the reflected light at the angle of incidence where resonance absorption occurs. This rapid change indicates that the reflected light can quickly transition from linear polarization to right- or left-elliptical polarization at the zero-crossing point of s3.
Article
Materials Science, Multidisciplinary
Ghulam Abbas Khan, Yonghua Lu, Pei Wang
Summary: Graphene absorption in the visible to near-infrared spectrum can be enhanced by optimizing the metastructure. Surface plasmons and magnetic dipole plasmons play a key role in absorption. The dynamic control of surface plasmon resonance and magnetic dipole plasmon opens up possibilities for various optoelectronic applications.
Article
Chemistry, Physical
Jing Wang, Xin Wu, Yizhe Liu, Tian Qin, Kaicheng Zhang, Ning Li, Juan Zhao, Ruquan Ye, Zhanxi Fan, Zhenguo Chi, Zonglong Zhu
Summary: The study introduces a novel small molecular hole-transporting material SFDT-TDM based on spirofluorene-dithiolane, synthesized through easy and cost-effective routes, which shows high efficiency and stability in perovskite solar cells.
ADVANCED ENERGY MATERIALS
(2021)