Article
Engineering, Multidisciplinary
Youssef Essam, Ghada H. El-Nowihy
Summary: The study presents a highly efficient nanocomposite based on titania for dye-synthesized solar cells (DSSCs). The nitrogen-cobalt-cadmium-doped titania (N-Co-Cd-doped TiO2) prepared using the sol-gel method significantly enhances the photoelectric properties of DSSCs. Material characterization techniques such as scanning electron microscopy and X-ray spectroscopy reveal the surface morphology, composition, and phases of the prepared N-Co-Cd-doped TiO2 nanocomposite. The current-voltage measurements confirm the improved charge transport in DSSCs using N-Co-Cd-doped TiO2, and the power conversion efficiency in fluorescent dye reaches 5.4% (approximately eight times higher than TiO2).
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Wen-Feng Lai, Pei-Ling Chao, Xin-Yu Lin, Yin-Pei Chen, Jih-Hsin Liu, Tz-Feng Lin, Wei-Chou Hsu, Chia-Yi Huang
Summary: In this study, a one-dimensional protrusive TiO2 strip array was fabricated using chemical and physical methods. A porous semiconductor layer was coated on the strip array. The results showed that the DSSC with the TiO2 strip array had a higher energy conversion efficiency, which can be attributed to the large surface area of the protrusive structure and its specific electron transport paths.
Article
Chemistry, Physical
Tamasgen Fikadu Yadeta, Toyoko Imae
Summary: The carbon quantum dot (C-dot) acts as a photosensitizer and dye-adsorber. Adding C-dot to TiO2/NiO(10 wt%) nanocomposites significantly enhances the power conversion efficiency (PCE) of dye-photosensitized solar cells (DSSCs) up to 2.88 times. However, in TiO2/CuO/C-dot nanocomposites, the addition of C-dot leads to a decrease in PCE.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Adriana Martinez Oviedo, Hien Truong Thi, Quang Chau Van, Hao Huy Nguyen
Summary: By investigating the physicochemical properties of Fe-doped TiO2, it was found that the material possessed defect structures including oxygen vacancies, Ti3+, and Fe ions. These defect structures prevented electron-hole recombination, thereby enhancing the lifetime of the photoelectrons. As a result, the efficiency of Fe-TiO2-based DSSC increased to 30% compared to undoped-TiO2-based DSSC.
Article
Multidisciplinary Sciences
R. Krishnapriya, C. Nizamudeen, B. Saini, M. Sayem Mozumder, Rakesh K. Sharma, A. -H. I. Mourad
Summary: The facile synthesis and application of nano-sized semiconductor metal oxides for optoelectronic devices are challenging due to multi-step processes. Semiconductor oxides derived directly from metal-organic frameworks (MOFs) show promise for clean energy conversion and storage devices, with the potential to enhance light absorption in the visible region and improve overall performance.
SCIENTIFIC REPORTS
(2021)
Article
Engineering, Electrical & Electronic
Nazir Mustapha, Muhammad Abdel-Shakour, Idriss Bedja, M. Abdel Rafea
Summary: The photovoltaic performance of black dye-based dye-sensitized solar cells can be improved by introducing long alkoxy group, tuning anchoring parts, and pi-spacer, which reduces dye aggregation and improves sensitizer coverage.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Physics, Multidisciplinary
Yu-Chih Chiang, Chia-Rong Lee, Chia-Yi Huang
Summary: A 90-nm-thick TiO2 grid was fabricated using photolithography, sputtering, and lift-off process. A nanoporous film was deposited on the TiO2 grid, which induced a protrusive structure. Experimental results showed that introducing the TiO2 grid into a dye-sensitized solar cell increased its power conversion efficiency by 25%. This improvement can be attributed to the large surface area and directional electron transport channels of the protrusive structure.
Article
Materials Science, Multidisciplinary
Hui Zhao, Feifei Nie, Shuhui Liu, Yuanhao Li, Kezhong Wu, Mingxing Wu
Summary: Researchers have successfully synthesized a series of hierarchical MoC1-x@N-doped carbon composites through a simple one-step self-polymerization method. These composites exhibit excellent electron conduction and electrocatalytic performance, and have numerous active catalytic sites. As counter electrodes in dye-sensitized solar cells, these composites achieve comparable power conversion efficiencies to Pt counter electrodes.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Energy & Fuels
Mahesh Dhonde, Kirti Sahu, V. V. S. Murty
Summary: Cu-doped TiO2/graphene (CuTGR) composites were prepared for the first time in this study and applied to DSSC anodes. Surface morphological and elemental analysis showed uniform distribution of Cu and graphene in the composite with desired morphology. Addition of graphene improved dye loading ability and charge transport, leading to increased power conversion efficiency in DSSC.
Article
Energy & Fuels
Abdullah Atilgan, Abdullah Yildiz
Summary: The development of novel bilayer photoanodes is crucial for efficient dye-sensitized solar cells. In this study, a homojunction photoanode consisting of undoped and Ni-doped TiO2 layers was prepared. By tuning the location of the doped layer, the photoconversion efficiency was greatly improved. The bilayer structure enhanced light absorption, resulting in increased short circuit current and open-circuit voltage.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Tharmakularasa Rajaramanan, G. R. A. Kumara, Dhayalan Velauthapillai, Punniamoorthy Ravirajan, Meena Senthilnanthanan
Summary: This study focuses on synthesising and characterising Ni/N co-doped P25-TiO2 nanostructure electrodes for photovoltaic application. Enhanced light absorption and improved surface roughness of Ni/N co-doped TiO2 electrode contribute to the higher performance of the fabricated DSSCs. The increase in short circuit current density (JSC) is mainly responsible for the improved power conversion efficiency (PCE) of the co-doped device.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Engineering, Electrical & Electronic
S. Rajkumar, M. R. Venkatraman, K. Suguna, P. Karuppasamy, M. Senthil Pandian, P. Ramasamy
Summary: In this study, a green synthesis approach was used to dope silver (Ag) ions onto the TiO2 lattice using grapefruit extracts as a solvent, resulting in the preparation of dye-sensitized solar cells with improved performance. The results showed that the TiO2 nanoparticles with 5% silver doping exhibited high efficiency for both natural and commercial dyes.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Energy & Fuels
Kezhong Wu, Shan Liu, Yingshan Wu, Bei Ruan, Jianing Guo, Mingxing Wu
Summary: This study successfully synthesized N-doped W2C catalytic materials through ball-grinding and pyrolysis, and applied them as CEs catalysts in DSSCs. The N-doped W2C materials showed higher power conversion efficiency compared to the regeneration of traditional iodide/triiodide (I-3(-)/I-).
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Physical
Fadzai Lesley Chawarambwa, Tika Erna Putri, Kunihiro Kamataki, Masaharu Shiratani, Kazunari Koga, Naho Itagaki, Daisuke Nakamura
Summary: A series of Yb3+/Ho3+ co-doped Y2O3 up-conversion nanophosphors were fabricated using a homogeneous precipitation method, and their application in DSSC was investigated for enhanced cell efficiency.
JOURNAL OF MOLECULAR STRUCTURE
(2021)
Article
Engineering, Electrical & Electronic
Tharmakularasa Rajaramanan, Dhayalan Velauthapillai, Punniamoorthy Ravirajan, Meena Senthilnanthanan
Summary: This study presents a simple impregnation method to synthesize Ni-doped TiO2 nanomaterials using P25-TiO2 as a starting material. The as prepared nanomaterials were characterized structurally and optically, and then applied in photovoltaic studies. The results showed that Ni doping did not alter the anatase and rutile contents of P25-TiO2, as confirmed by XRD and Raman studies. The presence of dopants and their ionic states was confirmed by EDX and XPS spectroscopies. AFM images revealed that Ni doping increased the surface roughness of TiO2. UV-Visible spectroscopy indicated that Ni doping caused red shift in light absorption and improved dye adsorption on TiO2 films. Photovoltaic studies showed that the optimized 0.10 wt% Ni-doped TiO2 photoanode exhibited a high power conversion efficiency of 6.29% under AM 1.5 conditions. The electrochemical impedance spectroscopic study also revealed improved charge transport properties for the device with optimized Ni-doped TiO2.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
