Article
Energy & Fuels
Linghai Meng, Lifu Shi, Yong Ge, Jialun Tang, Yu Chen, Haizheng Zhong
Summary: Photon management, combining antireflection and luminescence down-shifting coatings, improves the efficiency of silicon solar cells by addressing reflection loss and spectral mismatch issues. The combination of these coatings provides a low-cost and effective way to enhance device performance.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Physical
Jian Yong Huang, Yu Wang, Guang Tao Fei, Shao Hui Xu, Biao Wang, Zhi Zeng
Summary: In this study, a ZnO nanoparticle coating with antireflection and down-shifting properties was prepared on Si substrate using the sol-gel method. The coating showed remarkable antireflection enhancement and down-shifting effect, leading to improved photovoltaic conversion efficiency of the solar cells.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Ceramics
Vu Duy Tan, Nguyen Ba Tong, Nguyen Thi Van Quynh, Cao Thi My Dung, Trinh Dung Chinh, Le Van Thanh Son, Ta Thi Kieu Hanh, Phan Bach Thang, Le Thuy Thanh Giang, Tran T. T. Van
Summary: Each person's latent fingerprints are unique and provide essential clues in forensic science. The powder dusting method currently used for LFP detection has limitations, including low efficiency, low sensitivity, and toxicity. Our research proposes a NaYF4:Eu3+ phosphor that overcomes these limitations and shows good potential for LFP detection.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Arun Kumar Samuel, Reshma K. Dileep, Manonmani Jayaraman, Ganapathy Veerappan, Senthilselvan Jayaraman
Summary: The Ce3+-doped SrF2 nanophosphor used as a down-shifting material in DSSCs exhibited excellent luminescence and light absorption properties, leading to enhanced visible-light photon harvesting and high chemical stability. The nanocomposite-based device fabricated with Ce3+:SrF2/TiO2 photoanodes demonstrated an outstanding photo-conversion efficiency of 8.8%, attributed to the improved incident-photon-to-current efficiency curve and electrochemical values.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Energy & Fuels
Jiayao Xu, Wei Pan, Wenzhong Shen
Summary: In this study, a MAPbBr3/PMMA hybrid film was used as a LDS layer, leading to a significant increase in the conversion efficiency of commercial silicon solar cells with optimized AR.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Physical
Zhengce An, Jinshu Huang, Long Yan, Li He, Bo Zhou
Summary: Persistent luminescence has become a hot research topic with various applications. However, most reported persistent luminescence is based on dopants rather than the host matrix, which also plays an important role. This study presents a novel nanostructure design that combines persistent luminescence, upconversion, and down-shifting luminescence to control emission colors under different excitation modes. Additionally, the physical origin of persistent luminescence in the CaF2 matrix is explored through simulations of energy band structures and defects.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Optics
Roberto Masahiko Aoki, Everton Tiago dos Santos Torres, Joao Paulo Almirao de Jesus, Sidney Alves Lourenco, Ricardo Vignoto Fernandes, Edson Laureto, Marco Aurelio Toledo da Silva
Summary: The study successfully improved the photovoltaic performance of organic solar cells by applying cadmium sulfide quantum dots as a luminescence down-shifting layer. The use of this new material in organic photovoltaic devices resulted in higher power conversion efficiency during exposure to light.
JOURNAL OF LUMINESCENCE
(2021)
Article
Chemistry, Physical
Jia-Yu Hsu, Ren-Jei Chung, Natalia Majewska, Dominik Kreft, Hwo-Shuenn Sheu, Jyh-Fu Lee, Sebastian Mahlik, Mu-Huai Fang
Summary: This study reports LiGa5(1-x)Al5xO8:Cr3+ phosphors with sharp line emissions and reveals their potential for LED applications. The study reveals the subtle change of the local structure around Cr3+ and the difference between temperature-dependent photoluminescence and decay profile.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Jose A. Jimenez, Dugan Hayes, Carson Hasselbrink
Summary: The conversion of ultraviolet to near-infrared photons is demonstrated in Yb3+-containing glass via Sn2+ for the first time. The investigation confirms the existence of divalent tin centers and proposes an energy transfer process involving tin and ytterbium to explain the enhanced UV-excited NIR emission from Yb3+ ions.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Anna Lucia Pellegrino, Emil Milan, Adolfo Speghini, Graziella Malandrino
Summary: In this study, Eu-doped CaF2 thin films were fabricated using the sol-gel process for down-shifting applications. The fine-tuning of parameters resulted in high uniformity films with good crystalline properties even at low temperatures. The down-shifting properties were validated through fluorescence measurements, and a correlation with doping ion percentages was observed.
Article
Energy & Fuels
Tiezheng Lv, Yao Tang, Haonan Fan, Su Liu, Shengqu Zeng, Wei Liu
Summary: The use of fluorescent carbon quantum dots anchored on porous silica film enhances the output of encapsulated solar panels, promoting the wider use of solar power. This dual-functional film, serving as anti-reflection and luminescence down-shifting materials, guarantees the best UV absorption/conversion for LDS on top of the solar panel.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Optics
K. Pratibha, S. Gaurav, Ashutosh Kumar Dikshit, Y. Dwivedi
Summary: In this study, nanosized LiAlSi3O8 phosphors doped with Sm3+ ions were synthesized and their structural and spectroscopic properties were investigated. The formation of nanosized phosphor was confirmed by e-beam images and x-ray diffraction analysis, which showed the precipitation of LiAlSi3O8 nanocrystals with a crystalline size of 35 +/- 1 nm. Photoexcitation and luminescence analysis revealed bright emission in the orange-red region under UV-blue excitations. The optimum luminescence intensity was observed at 602 nm (4G5/2 -> 6H7/2) for a concentration of 0.75 mol%. The effect of concentration and laser excitation power on the emission characteristics of the Sm ion was also studied. Temperature-dependent optical analysis demonstrated the good temperature sensitivity of the phosphor in the range of 273-498 K. Color perception was found to vary with laser power, concentration, and temperature, as revealed by CIE coordinate analysis.
JOURNAL OF LUMINESCENCE
(2023)
Article
Polymer Science
Ningappa Kumara Swamy, Kikkeri Narasimha Shetty Mohana, Beejaganahalli Sangameshwara Madhukar
Summary: In this study, flexible poly vinyl alcohol (PVA) nanocomposites with different compositions of graphene nanoribbon (GNR) were prepared and characterized. GNR was found to bind to PVA chains through Vander Waals forces, leading to crystallographic changes in PVA matrix. Optical investigations showed enhanced UV-visible absorption with increasing GNR dopant concentration, as well as decreased optical band gap and Urbach energy. The nanocomposites also exhibited excellent agreement between refractive index, absorption coefficient, extinction coefficient, optical conductivity, and band gap revelations, indicating UVC light blocking properties. Furthermore, the GNR incorporated PVA nanocomposites showed improved thermal stability, wettability transitions, and luminescent down-conversion properties.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2023)
Article
Optics
Inigo Liberal, J. Enrique Vazquez-Lozano, Victor Pacheco-Pena
Summary: The quantum optical response of antireflection temporal coatings (ATCs), which suppress the generation of backward waves in temporal boundaries, is investigated. The results show that quantum ATCs induce a frequency shift of the quantum state while preserving all photon statistics intact. They can be applied for fast quantum frequency shifting in photonic quantum networks. Furthermore, quantum ATCs allow for fast temporal switching without amplification of thermal fields.
LASER & PHOTONICS REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Pankaj Biswas, Vinay Kumar, Kamni
Summary: The preparation of KSr(1 - 3x/2)VO4:xTb(3+) powders (x = 0 to 5.0 mol%) via a low-cost combustion route is reported. The XRD and TEM studies confirm the phase purity and nano-size of the powdered grains. UV-Vis spectroscopy reveals appreciable absorption efficiency in the UV excitation range. The nanophosphor shows potential as a green-emitting candidate for white light LEDs for reflected light illumination applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
