Article
Energy & Fuels
Min-Kyu Son
Summary: In this study, sputtered gold (Au) and copper (Cu) grid lines were introduced to improve the PEC performance of large-scale cuprous oxide (Cu2O) photocathode, with Cu grid lines being more effective. The PEC performance of a 25-cm(2) scaled Cu2O photocathode with Cu grid lines was almost double than one without grid lines, resulting in an improved charge transport in the large area substrate. The outdoor demonstration of a 50-cm(2) scaled Cu2O photocathode with Cu grid lines provides insight into the development of efficient upscaled PEC photoelectrode.
Article
Nanoscience & Nanotechnology
Chien-Neng Liao, Ting-Kai Chang, Yan-Syun Huang, Hsin-Yu Chen
Summary: This study successfully improved the photocurrent density of Cu2O films by controlling the electrodeposition current density and introducing a Cu2Te layer, thereby enhancing their photoelectrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
Madhusudana Gopannagari, Kethireddy Arun Joshi Reddy, Song Inae, Hyung Suk Bae, Junho Lee, Tae Gyun Woo, A. Putta Rangappa, Dharani Praveen Kumar, D. Amaranatha Reddy, Tae Kyu Kim
Summary: By incorporating Ag+ ions into the nanosized porous CBO network, the photocathode exhibits improved charge carrier separation and transfer. The introduction of a NiO hole-selective layer further enhances the charge transfer across the back interface. Compared with unmodified CBO, the NiO/ACBO photocathode shows three-fold enhanced photocurrent performance.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Chemistry, Physical
Lingxue Diao, Lingcheng Zheng, Rui Zhang, Feifei Chen, Yan Li, Weihua Wang, Feng Lu, Liying Chen, Hui Liu, Hong Dong, Yahui Cheng
Summary: The proposed Cu2O-based photocathode protection strategy using atomic layer deposition technology to deposit TiN thin film as the protective layer significantly enhances the stability of the photocathode. The optimized photocathode maintains the initial photocurrent density for more than 35 minutes at 0 V vs RHE and retains 71% of the initial value after 1 hour of testing, showing a 16-fold enhancement compared to the bare photocathode.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yufeng Cao, Huajian Qiao, Yalong Zou, Na An, Yang Zhou, Deyu Liu, Yongbo Kuang
Summary: This study reports a mild approach to fabricate a ready-to-use functional n-type layer by creating an interfacial electric field in a p-n heterojunction. The approach effectively addresses the carrier recombination issue in light-absorbing p-type semiconductors and shows great potential for practical applications in photoelectrochemical devices.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Manoj Vishwakarma, Yogita Batra, Joke Hadermann, Aditya Singh, Abhishek Ghosh, B. R. Mehta
Summary: This study reports the hydrogen evolution properties of CZTS heterostructure photocathodes with graphene oxide (GO) as a co-catalyst layer and an Al2O3 protection layer. The results show that GO as a co-catalyst significantly improves the photocurrent density, and the Al2O3 protection layer provides a stable photocurrent.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Min-Kyu Son, Linfeng Pan, Matthew T. Mayer, Anders Hagfeldt, Michael Gratzel, Jingshan Luo
Summary: Cuprous oxide is a promising photocathode material for PEC water splitting, but suffers from poor stability in strong acidic or alkaline conditions. Improvements in performance have been made by introducing nanostructures and catalysts, but further research is needed to establish suitable protection strategies for durable PEC water splitting.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Huimin Li, Tuo Wang, Shanshan Liu, Zhibin Luo, Lulu Li, Huaiyuan Wang, Zhi-Jian Zhao, Jinlong Gong
Summary: Silicon is a promising material for photocathodes in photoelectrochemical water splitting, but faces limitations due to photocorrosion. This paper explores the introduction of controllable oxygen vacancy distribution in TiO2 to promote carrier transport, resulting in improved efficiency in hydrogen production through photoelectrochemical processes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Materials Science, Multidisciplinary
Huihui Deng, Cunqi Qin, Kemei Pei, Guoyong Wu, Mei Wang, Huagang Ni, Peng Ye
Summary: In the catalytic process of semiconductors, the rapid recombination of electron-holes greatly reduces the catalytic activity. A low-defect reduced hydroxylated graphene (RGOH) was used as a carrier material to prepare TiO2/reduced hydroxylated graphene (T/RGOH) nanocomposite photocatalyst, which showed a higher degradation efficiency for methylene blue compared to pure TiO2 and TiO2/reduced graphene oxide (T/RGO) nanocomposite photocatalysts. The enhanced performance was attributed to the higher electrical conductivity of RGOH and the existence of Ti-O-C bonds in the T/RGOH, which improved electron-hole separation and prevented rapid recombination.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Min-Li Guo, Shi-Peng Wan, Cao-Long Li, Kan Zhang
Summary: This study reports a graphene oxide (GO) layer that promotes charge transfer from BiVO4 to NiOOH catalyst and improves stability. The rationally designed photoanode achieves high photocurrent density at 1.23 V, providing a low-cost auxiliary material for enhancing photoelectrochemical water splitting.
Article
Chemistry, Physical
Carlos G. O. Bruziquesi, Matheus C. P. Stolzemburg, Rafael R. de Souza, Mariandry Rodriguez, Maria L. Rocco, Pedro E. A. Salomao, Andre E. Nogueira, Zoraya E. Lopez-Cabana, Marcio C. Pereira, Adilson C. Silva
Summary: CuBi2O4 is a promising photocathode material for water-splitting photoelectrochemical cells, but its poor stability due to Cu2+ reduction limits its application. This study presents a strategy to decrease Cu2+ reduction by using cobalt as a sacrificial metal. Co-doped CuBi2O4 films were prepared, and the reduction of Cu2+ was minimized by the partial oxidation of Co2+ to Co3+. Compared to the CuBi2O4 film, the Co-doped film exhibited a significantly lower drop in photocurrent, indicating enhanced photostability.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
K. D. R. N. Kalubowila, M. Siyath Gunewardene, J. Lakmini Kaushalya Jayasingha, Dhammike Dissanayake, Charith Jayathilaka, J. M. Dilushan Jayasundara, Yun Gao, J. K. D. Sumedha Jayanetti
Summary: A highly efficient Cu2O/Cu/rGO composite photocatalyst was synthesized through a series of steps, showing significantly improved degradation of methylene blue in solution compared to using Cu2O alone, with minimal effects of photocorrosion. The layered graphene oxide provides an effective medium for photoelectron transportation to the reactant while inhibiting photocorrosion, and also demonstrated the ability to split water under visible light in the presence of methanol.
ACS APPLIED NANO MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
E. H. Eldrehmy, Y. S. Alghamdi, H. H. Amer, M. H. Yassin, S. A. Mostafa, Moustapha Eid Moustapha, A. A. Menazea
Summary: Nanocomposites (NCs) are hybrid materials that improve the properties of individual compounds. HAP and Cu2O were confirmed to have hexagonal and cubic symmetry, respectively, through XRD analysis. Different scanning techniques revealed nanorod-shaped HAP. The ternary nanocomposite (TNC) showed significant antibacterial activity and good cell viability.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. J. Rendell, S. D. Liles, A. Srinivasan, O. Klochan, I Farrer, D. A. Ritchie, A. R. Hamilton
Summary: Magnetic focusing can be used to measure spin polarization and the strength of spin-orbit interaction in two-dimensional systems. By controlling the spatial separation of spins, the splitting of magnetic focusing peaks can be controlled.
Article
Energy & Fuels
Iqbal Singh, Viplove Bhullar, Aman Mahajan
Summary: This study focuses on improving the performance of quantum dot-sensitized TiO2 photoanodes using graphene nanoribbons (GNRs) to reduce recombinations and enhance electron transport. The optimized photoanodes show higher power conversion efficiency and photocurrent density in quantum dot-sensitized solar cells and photoelectrochemical water-splitting applications.
Article
Materials Science, Coatings & Films
Hui-Wen Tsao, Chao-Cheng Kaun, Yen-Hsun Su
SURFACE & COATINGS TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Po-Yen Kung, Fei Pan, Yen-Hsun Su
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Nanoscience & Nanotechnology
Sheng-Che Yen, Yu-Lin Chen, Yen-Hsun Su
Article
Nanoscience & Nanotechnology
Chun-Yuan Wu, Chia-Ju Lee, Yi-Hsing Yu, Hui-Wen Tsao, Yen-Hsun Su, Chao-Cheng Kaun, Jen-Sue Chen, Jih-Jen Wu
Summary: The SnS-SnS2 heterostructured nanosheet framework demonstrates promising photocatalytic activity for converting CO2 and water to C2 and C3 hydrocarbons. The enhanced photocatalytic performance is attributed to the increased fraction of crystalline SnS in nanosheets through partial transformation of SnS2, allowing for efficient CO2 conversion catalysis with low activation energy. The Z-scheme charge transfer dynamic in the SnS-SnS2 heterostructured nanosheet framework enhances not only charge separation efficiency but also catalytic activity for CO2 conversion.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Ceramics
Yi-Wei Chen, Jr-Jeng Ruan, Jyh-Ming Ting, Yen-Hsun Su, Kao-Shuo Chang
Summary: This study demonstrates the fabrication and superior piezoelectric performance of high-entropy Ba(Ti,Hf,Zr,Fe,Sn)O-3 films. Sample A exhibits the highest piezoelectric coefficient among all samples, attributed to high crystallinity, slightly textured polycrystalline structure, and cocktail effects. Enhanced piezoelectricity was achieved for both high-entropy oxide and medium-entropy oxide samples after poling, indicating their ferroelectric effect.
CERAMICS INTERNATIONAL
(2021)
Article
Energy & Fuels
Yi-Sheng Lai, Yen-Hsun Su
Summary: This research reveals a method to effectively increase the spintronic population, which has been successfully applied in energy harvesting devices, leading to high energy conversion efficiency and excellent charge mobility.
Article
Energy & Fuels
Yi-Sheng Lai, Yen-Hsun Su
Summary: In this study, high-performance spintronic water-splitting devices with high applied power operating at room temperature were demonstrated using the Ce2O3 small polaron surface state-based spintronic injection system. The spintronic entanglement tomography decrypted information about ultrahigh-energy conversion efficiency and optimal applied voltage. Ce+3 ions exhibited unpaired d orbitals for achieving spin-orbital coupling by accepting quantum information from incident laser light.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Thi Xuyen Nguyen, Yen-Hsun Su, Chia-Chun Lin, Jrjeng Ruan, Jyh-Ming Ting
Summary: A new high entropy material, HEG, synthesized via a simple solvothermal process, shows excellent oxygen evolution reaction (OER) activity and outperforms binary-, ternary-, and quaternary-metal glycerates. The significance of synergistic effect is demonstrated in modifying electronic structure and coordination environment. Moreover, HEG exhibits outstanding stability and durability in alkaline electrolyte and shows good overall water splitting performance in HEG@HEG electrolyzer.
Article
Chemistry, Multidisciplinary
Dinh-Tuan Nguyen, Hsiang-An Ting, Yen-Hsun Su, Mario Hofmann, Ya-Ping Hsieh
Summary: The study introduced additive-assisted exfoliation (AAE) to significantly increase the efficiency of shear exfoliation and achieved an exfoliation yield of 30%. By dynamically reducing the gap between rotor and stator, shear rate was increased, leading to enhanced production of WS2 and MoS2.
Article
Chemistry, Multidisciplinary
Thi Xuyen Nguyen, Yi-Cheng Liao, Chia-Chun Lin, Yen-Hsun Su, Jyh-Ming Ting
Summary: A new type of lanthanum-based high entropy perovskite oxide (HEPO) electrocatalyst for the oxygen evolution reaction has been reported. The HEPOs with B-site lattices consisting of five consecutive first-row transition metals exhibit excellent OER electrocatalytic performance, with La(CrMnFeCo2Ni)O-3 HEPO showing outstanding OER overpotential and electrochemical stability.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Hai-Thai Nguyen, Yen Nguyen, Yen-Hsun Su, Ya-Ping Hsieh, Mario Hofmann
Summary: The use of 2D materials enables the reliable production of high-quality and high-yield nanogap tunnel junctions. This advancement in fabrication not only improves productivity but also allows for precise control over nanogap dimensions and high uniformity in size. Through the one-dimensional nano-trench geometries, tunnel junctions that can sustain larger tunneling currents than conventional 0D nano-junctions are achieved.
Article
Chemistry, Physical
Jia-Hong Pan, Kun-Ta Lin, Wei-Ting Li, Yi-Chang Wu, Jia-Han Lyu, Jyh-Ming Ting, Kao-Shuo Chang, Yen-Hsun Su, U-Ser Jeng, Jrjeng Ruan
Summary: The enhanced secondary crystallization of ferroelectric polymer PVDF-TrFE above Curie temperature leads to crystal association and sequential coalescence, resulting in oriented stacking arrays of crystals with high dielectric constant in thin films.
APPLIED SURFACE SCIENCE
(2021)
Proceedings Paper
Energy & Fuels
Mei-Yi Tseng, Yen-Hsun Su, Yi-Sheng Lai, Fei Pan, Po-Yen Kung
4TH INTERNATIONAL CONFERENCE ON OPTICS IN MATERIALS, ENERGY, AND TECHNOLOGIES 2019 (ICOMET-2019)
(2020)
Article
Chemistry, Applied
Thi Xuyen Nguyen, Yen-Hsun Su, Jason Hattrick-Simpers, Howie Joress, Takahiro Nagata, Kao-Shuo Chang, Suchismita Sarker, Apurva Mehta, Jyh-Ming Ting
ACS COMBINATORIAL SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Miladina R. Aziza, Chia-Wei Chang, Anisha Mohapatra, Chih-Wei Chu, Chao-Cheng Kaun, Yen-Hsun Su
ACS APPLIED NANO MATERIALS
(2020)
