Article
Chemistry, Physical
Erica M. James, Marc T. Bennett, Gerald J. Meyer
Summary: Core/shell nanoparticles composed of SnO2 core and TiO2 shell show practical interest in dye-sensitized water splitting. Electroabsorption studies indicate that the shell can screen an electric field from a surface anchored dye. The field strength is significantly reduced when using SnO2/TiO2 core/shell materials compared to TiO2 alone.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Phuong Thao Trinh, Sina Hasenstab, Markus Braun, Josef Wachtveitl
Summary: This study investigates the electron transfer processes in methylene blue-CdTe and methylene blue-CdTe/CdSe complexes. The research finds that the growth of the shell accelerates the electron transfer rate and changes the shape of the quantum dots. Transient absorption measurements show that QDs with a thin shell can achieve charge carrier multiplication, leading to increased charge transfer efficiency.
Article
Materials Science, Multidisciplinary
Yi Di, Tianshi Qin
Summary: Incorporating plasmonic ZrN@TiO2 nanostructures into the photoanode of DSSC can efficiently improve the photovoltaic performance, showing potential applications.
Article
Nanoscience & Nanotechnology
Caroline E. Reilly, Robert J. Dillon, Animesh Nayak, Shane Brogan, Taylor Moot, Matthew K. Brennaman, Rene Lopez, Thomas J. Meyer, Leila Alibabaei
Summary: A core-shell approach was utilized to prepare efficient p-type dye-sensitized solar cells, with photocathodes sensitized using either a porphyrin chromophore or a porphyrin covalently tethered to a ruthenium complex. The sensitized photoelectrodes produced high cathodic photocurrents under simulated sunlight, which were increased by the addition of regenerative hole donors. Slow interfacial recombination kinetics were observed, highlighting the important property of p-type dye-sensitized electrodes.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Yu Xie, Cong Cao, Yu Li, Gaojun Ren, Jinsong Wang
Summary: In this study, a dye-sensitized composite nanomaterials with enhanced upconversion under 980 nm excitation was reported. The influence of different conditions on upconversion luminescence was systematically studied, including competitive luminescence center, dye molecules, dye concentration, and different composite systems. The results showed that the upconversion fluorescence can be enhanced 20 times when coated with phosphatidylcholine (PC). The compound structure wrapped with PC fully exploits the advantages of promoted upconversion, demonstrating promising biomedical application prospects and providing more opportunities for biomedical and energy applications.
JOURNAL OF LUMINESCENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Junzi Li, Zhihang Guo, Shuyu Xiao, Yudi Tu, Tingchao He, Wenjing Zhang
Summary: In this study, we synthesized core/shell hybrid perovskite nanocrystals with optimized optical stability and enhanced two-photon absorption, making them promising for application in nonlinear optoelectronic devices.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Michael J. Mortelliti, Annie N. Wang, Jillian L. Dempsey
Summary: The study on the deposition of ultrathin TiOx coatings on TiO2 and SnO2 cores using ALD revealed that after annealing at certain temperatures, the crystallinity and electronic structure of TiOx became closer to crystalline TiO2. In contrast, the TiOx coatings deposited at low temperatures or without annealing exhibited disordered structures with a broad distribution of trap states within the band gap.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: The hole transfer process from the core to the surface in InP/ZnS and InP/ZnSe/ZnS quantum dots was studied comparatively using ultrafast spectroscopy and time-resolved photoluminescence technology. The results show that InP/ZnSe/ZnS quantum dots have a faster hole transfer rate with a ZnSe midshell thickness of about 2.2 nm. This is because the ZnSe midshell increases the density of higher-energy hole states, allowing a larger proportion of photoexcited holes to be distributed in these states compared to InP/ZnS quantum dots. The easier hole transfer in these higher-energy states makes InP/ZnSe/ZnS quantum dots more suitable for photoelectric conversion systems than InP/ZnS quantum dots.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Environmental Sciences
Govind Sharma, Saurabh K. Saini, Komal Mulchandani, Amarnath Bheemaraju, Chhagan Lal
Summary: Natural dye-sensitized solar cells (DSSCs) are cost-effective and have a simple fabrication process. The choice of dyes significantly affects their performance. However, there is still a lack of comprehensive research on the photophysics and excited state dynamics of natural dyes used in DSSCs, highlighting the need for further investigation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Hajer Gallah, Frej Mighri, Abdellah Ajji, Jayita Bandyopadhyay
Summary: In this study, high porous flexible structures composed of polyethylene terephthalate (PET) and a PET composite with titanium dioxide (PET-TiO2) core/shell nanofibrous mats were developed using coaxial electrospinning technique. Different shapes of TiO2 nanoparticles were incorporated at various contents in the nanofiber shell to improve the properties of the fibrous mats. The surface morphology, porosity, thermal stability, dye adsorption, optical and mechanical properties of the nanofibrous mats were investigated. The successful incorporation of TiO2 nanoparticles inside the nanofibers was confirmed and the addition of TiO2 shifted the absorption spectra of the mats. The PET/(PET-TiO2) core/shell nanofibrous mats showed higher thermal stability and efficient charge transfer.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Shijia Zeng, Zhenbo Li, Wenjiang Tan, Jinhai Si, Yuren Li, Xun Hou
Summary: This study compares the ultrafast carrier dynamics in InP/ZnSe/ZnS core/shell/shell quantum dots (CSS-QDs) and InP/ZnS core/shell QDs (CS-QDs), revealing the impact of the ZnSe midshell on carrier dynamics. The results show that the ZnSe midshell enhances electron delocalization, prolongs the in-band relaxation time of electrons and holes, and reduces defect emissions. Additionally, the ZnSe midshell leads to an increased density of higher-energy hole states, which may decrease the probability of Auger recombination.
Article
Chemistry, Physical
Xianshao Zou, Robert Bericat Vadell, Bin Cai, Xinjian Geng, Ananta Dey, Yawen Liu, Axel Gudmundsson, Jie Meng, Jacinto Sa
Summary: Optical upconversion via a multiphoton absorption process converts low-energy photons to shorter wavelengths. A solid-state thin film for infrared-to-visible upconversion composed of plasmonic/TiO2 interfaces is reported in this study. When excited at & lambda; = 800 nm, three photons are absorbed, leading to the excitation of TiO2 trap states into an emissive state in the visible domain. The plasmonic nanoparticle enhances the light absorption capabilities of the semiconductor, increasing emission efficiency by 20 times.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Fengjuan Miao, Fuchen Chu, Bingcheng Sun, Bairui Tao, Peng Zhang, Yu Zang, Paul K. Chu
Summary: This study presents the design and fabrication of a photoanode composed of Au/SnS/TiO2 sensitized with natural dye for dye-sensitized solar cells (DSSCs). By calcination, a layer of spherical nano-TiO2 is prepared, and a layer of nano-SnS is deposited on the TiO2 photoanode using the continuous ion layer adsorption reaction (SILAR). The sensitized Au nanoparticles exhibit enhanced localized surface plasmon resonance (LSPR) effects and electron trapping ability, resulting in improved electron mobility and reduced electron recombination in the DSSC.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Chaoqiang Liao, Kaiwen Zeng, Hanlun Wu, Qingliang Zeng, Hao Tang, Lingyun Wang, Herbert Meier, Yongshu Xie, Derong Cao
Summary: The use of pillar[5]arene dyes can enhance the open-circuit voltage of DSSCs, while also inhibiting dye aggregation and charge recombination, leading to improved performance. Additionally, host-guest interactions with the electrolyte can further adjust the voltage and photocurrent of the DSSCs.
CELL REPORTS PHYSICAL SCIENCE
(2021)
Article
Energy & Fuels
M. A. K. L. Dissanayake, K. Umair, G. K. R. Senadeera, T. Jaseetharan, A. M. J. S. Weerasinghe, H. W. M. A. C. Wijayasinghe
Summary: In this study, plasmonic dye sensitized solar cells (DSSCs) were fabricated using MgO coated SnO2 (SnO2:MgO) based photoanodes incorporating gold nanoparticles (Au NP). Compared to the reference DSSC, the plasmonic DSSC displayed higher efficiency due to reduced electron recombination by an ultra-thin MgO barrier layer and enhanced light absorption by Au nanoparticles.
Review
Chemistry, Multidisciplinary
Dennis L. Ashford, Melissa K. Gish, Aaron K. Vannucci, M. Kyle Brennaman, Joseph L. Templeton, John M. Papanikolas, Thomas J. Meyer
Article
Chemistry, Physical
M. Kyle Brennaman, Michael R. Norris, Melissa K. Gish, Erik M. Grumstrup, Leila Alibabaei, Dennis L. Ashford, Alexander M. Lapides, John M. Papanikolas, Joseph L. Templeton, Thomas J. Meyer
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2015)
Review
Chemistry, Multidisciplinary
M. Kyle Brennaman, Robert J. Dillon, Leila Alibabaei, Melissa K. Gish, Christopher J. Dares, Dennis L. Ashford, Ralph L. House, Gerald J. Meyer, John M. Papanikolas, Thomas J. Meyer
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
Article
Chemistry, Multidisciplinary
David F. Zigler, Zachary A. Morseth, Li Wang, Dennis L. Ashford, M. Kyle Brennaman, Erik M. Grumstrup, Erinn C. Brigham, Melissa K. Gish, Robert J. Dillon, Leila Alibabaei, Gerald J. Meyer, Thomas J. Meyer, John M. Papanikolas
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
Article
Chemistry, Physical
M. Kyle Brennaman, Melissa K. Gish, Leila Alibabaei, Michael R. Norris, Robert A. Binstead, Animesh Nayak, Alexander M. Lapides, Wenjing Song, Robert J. Brown, Javier J. Concepcion, Joseph L. Templeton, John M. Papanikolas, Thomas J. Meyer
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Chemistry, Physical
Stephanie E. Bettis, Kenneth Hanson, Li Wang, Melissa K. Gish, Javier J. Concepcion, Zhen Fang, Thomas J. Meyer, John M. Papanikolas
JOURNAL OF PHYSICAL CHEMISTRY A
(2014)
Article
Chemistry, Physical
Melissa K. Gish, Austin L. Jones, John M. Papanikolas, Kirk S. Schanze
JOURNAL OF PHYSICAL CHEMISTRY C
(2018)
Article
Chemistry, Physical
Melissa K. Gish, Natalie A. Pace, Garry Rumbles, Justin C. Johnson
JOURNAL OF PHYSICAL CHEMISTRY C
(2019)
Article
Chemistry, Physical
Melissa K. Gish, Karl J. Thorley, Sean R. Parkin, John E. Anthony, Justin C. Johnson
Summary: The study enhances intermolecular coupling and crystallinity by carboxylic acid functionalization of anthradithiophene derivatives, significantly increasing the singlet fission rate in thin films. This enhancement also affects the utilization of triplet pairs.
Article
Chemistry, Multidisciplinary
Ann L. Greenaway, Sijia Ke, Theodore Culman, Kevin R. Talley, John S. Mangum, Karen N. Heinselman, Ryan S. Kingsbury, Rebecca W. Smaha, Melissa K. Gish, Elisa M. Miller, Kristin A. Persson, John M. Gregoire, Sage R. Bauers, Jeffrey B. Neaton, Adele C. Tamboli, Andriy Zakutayev
Summary: Photoelectrochemical fuel generation is a promising method for producing sustainable liquid fuels from water and carbon dioxide using sunlight as the energy input. This study reports on the synthesis and characterization of zinc titanium nitride (ZnTiN2), a photoelectrode material that exhibits self-passivating surface oxides and has both photocatalytic activity and operational stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Kevin P. P. Ruoff, Melissa K. K. Gish, Ellen Song, Iskander Douair, Pragati Pandey, Mark Steger, Justin C. C. Johnson, Patrick J. J. Carroll, Michael Gau, Christopher H. H. Chang, Ross E. E. Larsen, Andrew J. J. Ferguson, Eric J. J. Schelter
Summary: A new strategy for differentiating between Dy3+ and Y3+ ions by tailoring a photochemical reaction of their isostructural complexes using the f-electron states of Dy3+ as an energy sink was disclosed. This approach provides a new method for differentiating rare earth elements that does not depend on cation size.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Melissa K. Gish, Emily K. Raulerson, Ryan T. Pekarek, Ann L. Greenaway, Karl J. Thorley, Nathan R. Neale, John E. Anthony, Justin C. Johnson
Summary: Electron injection dynamics into mesoporous oxide substrates are affected by the driving force, with a weaker electronic coupling at the interface for triplet injection compared to singlet injection. The study reveals that triplet injection is negligible at zero bias due to competing recombination channels, but accelerates at higher driving forces, in line with predictions from Marcus theory with a metallic acceptor.
Article
Chemistry, Physical
Austin L. Jones, Melissa K. Gish, Charles J. Zeman, John M. Papanikolas, Kirk S. Schanze
JOURNAL OF PHYSICAL CHEMISTRY A
(2017)
Article
Chemistry, Physical
Subhadip Goswami, Jeff L. Hernandez, Melissa K. Gish, Jiliang Wang, Bethy Kim, Amrit P. Laudari, Suchismita Guha, John M. Papanikolas, John R. Reynolds, Kirk S. Schanze
CHEMISTRY OF MATERIALS
(2017)