Article
Energy & Fuels
Muhammad Yasin, Muhammad Khan, Norah Alwadai, Munawar Iqbal
Summary: Nanorods of TiO2, Sn-doped TiO2, TiO2@Sn-TiO2 and Sn-TiO2@TiO2 were prepared and characterized using SEM, XRD and UV-Vis spectroscopy. The results showed that the heterostructure film of Sn-TiO2@TiO2 had the smallest band gap and highest efficiency in DSSC among the four films.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(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)
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
Energy & Fuels
Aycan Atli, Abdullah Yildiz
Summary: An opaque platinum film as a counter electrode in dye-sensitized solar cells demonstrates enhanced reflectivity, smaller resistance, and excellent adhesion properties. As a result, the DSSC with the opaque platinum film achieves a higher electrical power conversion efficiency compared to the transparent platinum film under the same conditions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Chemistry, Multidisciplinary
Sikandar Aftab, Muhammad Zahir Iqbal, Sajjad Hussain, Fahmid Kabir, Hosameldin Helmy Hegazy, Burragoni Sravanthi Goud, Muhammad Aslam, Fan Xu
Summary: This review article provides an overview of MXene-modified electrodes in dye-sensitized solar cells (DSSCs). MXenes, a type of two-dimensional transition metal carbides or nitrides, have remarkable properties that enhance the performance of DSSC electrodes. The article analyzes the use of MXenes integrated with other materials for electrode modification in photovoltaics, and discusses the impact of different deposition techniques on performance. MXene-modified electrodes have the potential to improve the performance and efficiency of DSSCs, making them a promising material for renewable energy applications.
Article
Materials Science, Multidisciplinary
Bandana Ranamagar, Isaac Abiye, Fasil Abebe
Summary: The Rhodamine-6G derivative Rhd and its metal complexes with aluminum and chromium ions were synthesized and characterized using UV-vis and fluorescence spectroscopy. Dye-sensitized solar cells (DSSCs) were fabricated with Rhd and the metal complexes, and their solar-to-electric power efficiencies were determined through current-density measurements and Electrochemical Impedance Spectroscopy (EIS). The Rhd and Cr3+-sensitized solar cell showed the highest solar to electric power efficiency at 0.16%.
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
Materials Science, Multidisciplinary
Fengjuan Miao, Bingcheng Sun, Bairui Tao, Yanchun Wang, Paul K. Chu
Summary: This paper demonstrates the application of a novel ternary nanocomposite MoS2/Ag/TiO2 photoanode in high efficiency plasma dye sensitive solar cell. The ternary nanocomposite MoS2/Ag/TiO2 was successfully synthesized without any hazardous substances. The addition of MoS2 improves the light absorption ability and electron transfer rate of the photoanode, leading to a significant enhancement in the photoelectric conversion efficiency of the dye sensitive solar cell.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Multidisciplinary
Raghvendra S. Dubey, Sandesh R. Jadkar, Ajinkya B. Bhorde
Summary: This study focuses on the solvothermal preparation of nanoparticles using acetone without a surfactant, and the doping of metal ions to improve the performance of doped oxides. Various doped-TiO2 nanocrystals were successfully synthesized for dye-sensitized solar cells, showing enhanced conversion efficiency. Characterization techniques such as XRD, Rietveld refinement, absorption spectroscopy, and SEM confirmed the successful synthesis and improved properties of the nanocrystals.
Article
Chemistry, Physical
Hugo G. Lemos, Rodrigo M. Ronchi, Guilherme R. Portugal, Jessica H. H. Rossato, Gurpreet S. Selopal, David Barba, Everaldo C. Venancio, Federico Rosei, Jeverson T. Arantes, Sydney F. Santos
Summary: Dye-sensitized solar cells (DSSCs) are a promising technology for clean energy conversion. This study focuses on enhancing the efficiency of DSSCs by optimizing charge transport and non-radiative carrier recombination. The introduction of Ti3C2Tx MXene into the photoanode improves electron transport and increases the energy-to-current conversion of DSSCs.
ACS APPLIED ENERGY MATERIALS
(2022)
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, Multidisciplinary
Dongting Wang, Yuchen Li, Yimin Ding, Xiangchen Jia, Daopeng Zhong, Xianxi Zhang, Jinsheng Zhao, Yuzhen Fang
Summary: Synthesizing SnO2 composite nanostructures has been a challenge, but by adjusting operating variables, a hybrid structure of irregular zero-dimensional nanoparticles and two-dimensional nanosheets has been successfully created. Dye-sensitized solar cells constructed with this composite exhibited the highest conversion efficiency, thanks to the combined effects of each component.
Review
Chemistry, Multidisciplinary
Ana Belen Munoz-Garcia, Iacopo Benesperi, Gerrit Boschloo, Javier J. Concepcion, Jared H. Delcamp, Elizabeth A. Gibson, Gerald J. Meyer, Michele Pavone, Henrik Pettersson, Anders Hagfeldt, Marina Freitag
Summary: Dye-sensitized solar cells (DSCs) and dye-sensitized photoelectrochemical cells (DSPECs) have seen a revival in recent years as they offer unique properties such as low cost, non-toxic materials, colorfulness, transparency, and efficiency in low light conditions. This review covers advancements in DSC technology over the past decade, including theoretical studies, characterization techniques, materials, applications, and commercialization efforts by various companies.
CHEMICAL SOCIETY REVIEWS
(2021)
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
Chemistry, Physical
Shanmuganathan Venkatesan, Yun-Yu Chen, Hsisheng Teng, Yuh-Lang Lee
Summary: This study demonstrates a quick dye adsorption process using electrochemical methods, reducing the fabrication time of dye-sensitized solar cells. The electrodes prepared using constant potential methods show high performance in DSSCs with high efficiencies and low dark current densities.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Lee Seul Oh, Minseon Park, Yoo Sei Park, Youngmin Kim, Wongeun Yoon, Jeemin Hwang, Eunho Lim, Jong Hyeok Park, Sung Mook Choi, Min Ho Seo, Won Bae Kim, Hyung Ju Kim
Summary: Both experimental and computational methods are used in this work to investigate the effect of electrochemically-synthesized CuCo-oxide, Cu-oxide, and Co-oxide catalysts on the glycerol oxidation reaction. The Cu-based oxides show enhanced ability in cleaving C-C bonds, leading to high selectivity for glycolic acid and formic acid production, compared to the conventional Au and Pt catalysts.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Cheng Lin, Chaoran Dong, Sungsoon Kim, Yuan Lu, Yulan Wang, Zhiyang Yu, Yu Gu, Zhiyuan Gu, Dong Ki Lee, Kan Zhang, Jong Hyeok Park
Summary: By a simple annealing process, an enhanced Mie scattering effect of the well-documented porous BiVO4 photoanode was obtained, which significantly reduced reflectivity, increased light absorbability, and achieved efficient photo-electrochemical (PEC) oxidation of glycerol (GLY) to dihydroxyacetone (DHA) on the photoanode.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Jung Hwan Lee, SunJe Lee, Taehee Kim, Hyungju Ahn, Gyu Yong Jang, Kwang Hee Kim, Yoon Jun Cho, Kan Zhang, Ji-Sang Park, Jong Hyeok Park
Summary: Controlling oxygen vacancies in SnO2_x is crucial for efficient and stable perovskite solar cells (PSCs). However, most research only focuses on the results without analyzing the underlying phenomenological part of the strategy. This study reveals a new beneficial effect of controlling oxygen vacancies in SnO2_x by examining its role in suppressing unfavorable perovskite phase transitions and facilitating formamidinium cation retention at the interface. The findings emphasize the genuine necessity of reducing oxygen vacancies in SnO2_x.
Article
Engineering, Environmental
Young Moon Choi, Seung Hun Roh, Eujin Kwak, Dae-Geun Choi, Seok Joon Kwon, Jung Kyu Kim, Jong Hyeok Park
Summary: The introduction of plasmon induced energy transfer (PIET) is a promising approach to improve the photo-electrochemical (PEC) responses on metal-oxide based photoelectrodes. This study demonstrates effective localization of a plasmon-induced near-field on a photoelectrode via patterned Au NP assemblies (Au-PAT) that enhances the PEC responses for oxidation reactions. The optimized grating pitch of Au-PAT enhances the light absorption efficiency and increases the interband transition rate via PIET.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Jaehyun Kim, Dayoung Lee, Cheolho Kim, Haeli Lee, Seungjun Baek, Jun Hyuk Moon
Summary: Porous carbon nanospheres with controlled porosity and high electrochemical performance were prepared by coating ZnO on polystyrene spheres. The hierarchical pore structure and enriched sp3 defects of the carbon nanospheres allowed for full utilization of the surface area and achieved high capacitance and stability.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Physical
Han Gyo Jeong, Gwanghyun Lee, Jong Hyeok Park
Summary: Silicon is a promising active material for lithium-ion batteries with a high theoretical capacity. However, its fabrication requires complicated and high-cost processes to improve cyclic performance. Herein, we report a one-step wet ball-milling process to fabricate submicron silicon particles coated with a polyacrylonitrile (PAN) layer, which enhances electrolyte wettability and increases lithium-ion pathways on the silicon surface. These improvements result in a stable solid electrolyte interphase layer and reduced internal resistance of the electrodes. The silicon anodes with optimal particle size and PAN layer exhibit superior performance even at ultra-fast current density, and when combined with an NCM712 cathode, a full-cell demonstrates excellent performance.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhao Yang, Byung Gi Kim, Woongsik Jang, Jong Hyeok Park, Dong Hwan Wang
Summary: This study successfully improves the performance of organic photodetectors by introducing acid-free PEDOT-(PSS) films, enabling the diagnosis of blood circulation status and cardiovascular diseases.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Review
Energy & Fuels
Jinghan Wang, Dokyoon Kim, Jong Hyeok Park, Sangwoo Ryu, Mohammadreza Shokouhimehr, Ho Won Jang
Summary: This article reviews recent advancements in the electrochemical and photoelectrochemical production of H2O2, discussing the fundamental mechanism, electrode design, and engineering strategies. It also addresses the obstacles and challenges of this process, as well as methods to enhance H2O2 production and efficiency.
Article
Chemistry, Multidisciplinary
Mihui Park, Seonyong Cho, Junghoon Yang, Vincent Wing-hei Lau, Kwang Hee Kim, Jong Hyeok Park, Stefan Ringe, Yong-Mook Kang
Summary: The use of heterogeneous catalysts as substrates can regulate the growth of Li2O2 and the formation of solid/solid reaction interfaces, improving the reversibility, capacity, and durability of lithium-oxygen batteries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Jiwon Kim, Jae Hyung Kim, Cheoulwoo Oh, Hyewon Yun, Eunchong Lee, Hyung-Suk Oh, Jong Hyeok Park, Yun Jeong Hwang
Summary: An electro-assisted approach using acid-treated carbon electrocatalyst and in-situ cathodically generated reactive oxygen species is proposed for the partial oxidation of methane at ambient temperature and pressure. Reactive oxygen species activate methane and methanol, leading to selective methane partial oxidation. This study presents a method for the electrochemically assisted partial oxidation of methane to produce liquid oxygenate, HCOOH, selectively.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Tae-Kyung Liu, Gyu Yong Jang, Sungsoon Kim, Kan Zhang, Xiaolin Zheng, Jong Hyeok Park
Summary: Aqueous photoelectrochemical (PEC) cells are a promising technology for converting solar energy into hydrogen, but their efficiency and cost-effectiveness are limited by sluggish oxygen evolution reaction (OER) kinetics and the low economic value of the produced oxygen gas. Organic upgrading PEC reactions, especially alternative OERs, have gained considerable attention for improving efficiency and economic effectiveness. This review provides an overview of PEC reaction fundamentals, cost analysis, recent advances in organic upgrading reactions using different substrates, and discusses the current status, future prospects, and challenges towards industrial applications.
Article
Chemistry, Physical
Dongkyu Kim, Won-Gwang Lim, Youngmin Kim, Lee Seul Oh, Seongseop Kim, Jong Hyeok Park, Changshin Jo, Hyung Ju Kim, Joonhee Kang, Seonggyu Lee, Eunho Lim
Summary: The reaction pathway of electrocatalytic glycerol oxidation can be controlled by incorporating amorphous antimony oxide on the surface of a Pt nanoparticle electrocatalyst, resulting in highly selective glycerol oxidation to dihydroxyacetone. This strategy not only improves the selectivity, stability, and electro-catalytic activity of the Pt electrocatalyst, but also promotes the glycerol conversion in the reaction.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Cheolho Kim, Heewon Min, Junmin Kim, Jun Hyuk Moon
Summary: Fe-N-C single atom catalysts (SACs) are used to achieve high faradaic efficiency and ethanol conversion productivity in electrochemical methane oxidation. The potential limiting step for the oxygen evolution reaction (OER) is determined to be OOH* formation on stable active oxygen on Fe-N-C SACs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Sang Won Lee, Tae Heon Nam, Minkyu Kim, Seokhee Lee, Kyu Hyung Lee, Jong Hyeok Park, Tae Ho Shin
Summary: This study investigated the catalytic activity and reaction kinetics of CO2 reduction for metal catalysts (Co, Fe, Ni, and Ru) on a La(Sr)Fe(Mn)O-3 (LSFM) fuel electrode. The distribution of relaxation times analysis was conducted to study the adsorption and dissociation processes of CO2 molecules for each catalyst. The Fe catalyst showed the best electrolysis performance of 2.201 A cm(-2) at 1.5 V in CO2 electrolysis at 1123 K.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Ryan Rhee, Tae G. Kim, Gyu Y. Jang, Gwangmin Bae, Jung H. Lee, Sunje Lee, Sungsoon Kim, Seokwoo Jeon, Jong H. Park
Summary: Research has shown that combining photo-absorbing LHP with water-splitting catalysts can achieve efficient unbiased water splitting. By integrating the two monolithic LHP-based photoelectrodes, high solar-to-hydrogen conversion efficiency and photocurrent density are achieved.
