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
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
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, Physical
Jae-hun Bae, Hwang-Ju Jeon, Sung-Ho Cho, Yong-beom Cho, Sung-Eun Lee, Tae-Oh Kim
Summary: In this study, a dye-sensitized solar cell (DSSC) doped with Cu, Co was fabricated by simultaneously sonicating TiO2 and a trace amount of a transition metal precursor. The cavitation bubbles occurred during sonication resulted in defects on the surface of the TiO2 particles. The maximum energy-conversion efficiency of the DSSCs fabricated by TiO2 which doped with Cu and Co by ultrasonic treatment was 4.16%, and that of the DSSCs fabricated with TiO2 not doped with a transition metal was measured at 2.93%. Doping TiO2 with a transition metal using ultrasonic treatment contributed to the improvement of the performance of the TiO2 photoelectrode.
APPLIED SURFACE SCIENCE
(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
Chemistry, Physical
N. Sriharan, T. S. Senthil, P. Soundarrajan, Misook Kang
Summary: TiO2 nanorods were synthesized from colloidal titanate using a hydrothermal method, and Mg metallic ions were doped to study their influence on the growth of TiO2 nanorods. The introduction of Mg dopant induced constraint stress in the nanorods, resulting in a shift in preferentially oriented crystallographic plane. The crystallographic structures of TiO2 nanorods remained unchanged, but the surface to volume ratio and absorption capacity shifted due to Mg doping. This physical property change was confirmed by EDS analysis. The doped TiO2 nanorods showed improved performance as photoelectrodes in dye-sensitized solar cells, with the 2 mol.% Mg doped TiO2 nanorods achieving a high power conversion efficiency of 6.36%.
APPLIED SURFACE SCIENCE
(2022)
Article
Spectroscopy
Zahra Shariatinia, Amin Alizadeh, Mostafa Roudgar-Amoli, Melika Mahmoudi
Summary: To develop efficient photoelectrode nanomaterials for DSSCs, spinel ZnFe2O4 and Ag-doped ZnFe2O4 nanomaterials were incorporated into TiO2 photoanodes. The highest efficiency of 3.89% was achieved with TiO2 + 5 wt% ZnFe2O4 photoanode. The addition of Ag+ cations further improved the power conversion efficiency. The DSSC assembled using TiO2 + 5 wt% Ag0.2Zn0.90Fe2O4 photoanode achieved the highest PCE of 5.75%.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Sanjay Kumar Swami, Neetesh Kumar, Daniela R. Radu, Sung Woon Cho, Jongsu Lee
Summary: In this study, a post-lithium (Li) treatment on TiO2 films was performed to enhance the optoelectronic features and power conversion efficiency (PCE) of dye-sensitized solar cells (DSSCs). The Li treatment reduced defects and improved the crystallinity of the TiO2 films. DSSCs fabricated using Li-treated TiO2 films as photoanodes showed a performance improvement of approximately 20% and a PCE of 10.5%, compared to the control DSSC with a PCE of 8.7%. The enhanced performance was attributed to improved structural properties, efficient charge transport, and suppression of recombination due to the passivation of trap states.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Mi-Ra Kim, Thanh Chung Pham, Hyun-Seock Yang, Sung Heum Park, Seah Yang, Myeongkee Park, Sang Gil Lee, Songyi Lee
Summary: In this study, three types of TiO2 photoelectrodes were fabricated and evaluated for the dye-sensitized solar cells using synthesized organic photosensitizers. The double-layered nanoporous TiO2 photoelectrode showed the highest efficiency, compared to the single-layered nanoporous TiO2 photoelectrodes. The relationship between photovoltaic effects and interfacial resistance characteristics could be interpreted from impedance analysis.
Article
Chemistry, Physical
Sandeep B. Wategaonkar, Vinayak G. Parale, Sawanta S. Mali, Chang-Kook Hong, Rani P. Pawar, Parvejha S. Maldar, Annasaheb V. Moholkar, Hyung-Ho Park, Balasaheb M. Sargar, Raghunath K. Mane
Summary: This study utilized the one-step hydrothermal method to synthesize Sn-doped TiO2 thin films, investigating the influence of different Sn content on the performance of dye-sensitized solar cells. The 3% Sn-TiO2 thin film showed the highest efficiency in DSSCs, outperforming other samples.
Article
Energy & Fuels
Viplove Bhullar, Devarani Devi, Fouran Singh, Sundeep Chopra, A. K. Debnath, D. K. Aswal, Aman Mahajan
Summary: This study demonstrates the improvement of dye sensitized solar cell (DSSC) performance by inserting substitutional Ag into the photoanodes. The substitutional Ag implanted photoanodes show higher light absorption and reduced charge recombination, indicating a plausible mechanism for enhancing the photovoltaic performance of DSSCs.
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
Materials Science, Multidisciplinary
Zhen Li, Libo Yu
Summary: The researchers built TiO2 cavities on the top of the TiO2 NP layer using carbonaceous microspheres as the template, forming TiO2 cavity/nanoparticle (C/NP) photoelectrodes for dye-sensitized solar cells (DSSCs). The optimized TiO2 C/NP electrode with 25 wt.% carbonaceous microspheres showed significant improvement in short-circuit current density (J(sc)) and power conversion efficiency (PCE), achieving a PCE of 9.08%, which is over 98% higher than that of the TiO2 NP electrode. Further investigations revealed that the enhancement in PCE is attributed to the competition between light scattering effect and charges recombination in the TiO2 C/NP photoelectrode.
FRONTIERS OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Aditya F. Arif, Yuma Kobayashi, Elia M. Schneider, Samuel C. Hess, Ratna Balgis, Takafumi Izawa, Hideharu Iwasaki, Shuto Taniguchi, Takashi Ogi, Kikuo Okuyama, Wendelin J. Stark
Article
Chemistry, Multidisciplinary
Takashi Ogi, Takahiko Makino, Satoshi Nagai, Wendelin J. Stark, Ferry Iskandar, Kikuo Okuyama
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2017)
Article
Materials Science, Multidisciplinary
Umar Saleem, Fitri A. Permatasari, Ferry Iskandar, Takashi Ogi, Kikuo Okuyama, Yudi Darma, Meng Zhao, Kian Ping Loh, Andrivo Rusydi, Philippe Coquet, Muhammad Danang Birowosuto, Hong Wang
ADVANCED OPTICAL MATERIALS
(2017)
Article
Chemistry, Physical
Samuel C. Hess, Fitri A. Permatasari, Hiromitsu Fukazawa, Elia M. Schneider, Ratna Balgis, Takashi Ogi, Kikuo Okuyama, Wendelin J. Stark
JOURNAL OF MATERIALS CHEMISTRY A
(2017)
Editorial Material
Engineering, Chemical
Kikuo Okuyama
KONA POWDER AND PARTICLE JOURNAL
(2018)
Article
Chemistry, Multidisciplinary
Takahiko Makino, Satoshi Nagai, Ferry Iskandar, Kikuo Okuyama, Takashi Ogi
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2018)
Article
Chemistry, Multidisciplinary
Takashi Ogi, Hayato Horiuchi, Takahiko Makino, Aditya Farhan Arif, Kikuo Okuyama
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2018)
Article
Engineering, Chemical
Annie M. Rahmatika, Weilin Yuan, Aditya F. Arif, Ratna Balgis, Keita Miyajima, Gopinathan M. Anilkumar, Kikuo Okuyama, Takashi Ogi
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2018)
Article
Nanoscience & Nanotechnology
Chengbin Yang, Kok Ken Chan, Gaixia Xu, Mingjie Yin, Guimiao Lin, Xiaomei Wang, Wei-Jen Lin, Muhammad Danang Birowosuto, Shuwen Zeng, Takashi Ogi, Kikuo Okuyama, Fitri Aulia Permatasari, Ferry Iskandar, Chih-Kuang Chen, Ken-Tye Yong
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Engineering, Chemical
Asep Bayu Dani Nandiyanto, Takashi Ogi, Wei-Ning Wang, Leon Gradon, Kikuo Okuyama
ADVANCED POWDER TECHNOLOGY
(2019)
Editorial Material
Engineering, Chemical
Kikuo Okuyama
KONA POWDER AND PARTICLE JOURNAL
(2020)
Article
Multidisciplinary Sciences
Qing Li, Christina W. Kartikowati, Toru Iwaki, Kikuo Okuyama, Takashi Ogi
ROYAL SOCIETY OPEN SCIENCE
(2020)
Article
Engineering, Chemical
Leon Gradon, Ratna Balgis, Tomoyuki Hirano, Annie Mufyda Rahmatika, Takashi Ogi, Kikuo Okuyama
JOURNAL OF AEROSOL SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Fitri A. Permatasari, Hiromitsu Fukazawa, Takashi Ogi, Ferry Iskandar, Kikuo Okuyama
ACS APPLIED NANO MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Febrigia Ghana Rinaldi, Osi Arutanti, Aditya Farhan Arif, Tomoyuki Hirano, Takashi Ogi, Kikuo Okuyama