A5000887480- Copper-based nanomaterials and applications
- ZnO doping and properties
- Electronic and Structural Properties of Oxides
- Advanced Photocatalysis Techniques
- Chalcogenide Semiconductor Thin Films
- Ga2O3 and related materials
- Gas Sensing Nanomaterials and Sensors
- Electrocatalysts for Energy Conversion
- Quantum Dots Synthesis And Properties
- Electrochemical Analysis and Applications
- Conducting polymers and applications
- Perovskite Materials and Applications
- Semiconductor materials and devices
- Hybrid Renewable Energy Systems
École Polytechnique Fédérale de Lausanne
2024-2025
University of Zurich
2017-2025
Zhejiang University
2013-2018
Silicon Labs (United States)
2018
State Key Laboratory of Silicon Materials
2018
Hangzhou Xixi hospital
2017
Hangzhou Academy of Agricultural Sciences
2015-2017
Abstract Solar fuels offer a promising approach to provide sustainable by harnessing sunlight 1,2 . Following decade of advancement, Cu 2 O photocathodes are capable delivering performance comparable that photoelectrodes with established photovoltaic materials 3–5 However, considerable bulk charge carrier recombination is poorly understood still limits further advances in 6 Here we demonstrate beyond the state-of-the-art exploiting new conceptual understanding and transport single-crystal...
Abstract Cu 2 O is one of the most promising light absorbing materials for solar energy conversion. Previous studies with water splitting usually deliver high photocurrent or photovoltage, but not both. Here, a O/Ga 3 /TiO /RuO x photocathode that benefits from quality thermally oxidized layer and good band alignment Ga buffer reported, yielding 6 mA cm −2 at 0 V versus reversible hydrogen electrode (RHE), an onset potential 0.9 RHE, 3.5 0.5 RHE. The quantum efficiency spectrum (incident...
Crystal orientation-dependent etching, charge-carrier trapping behaviour, and performance of single-crystal photocathodes are enabled by ammonia solution etching thermally-oxidised Cu 2 O.
Cu2S is a promising solar energy conversion material due to its suitable optical properties, high elemental earth abundance, and nontoxicity. In addition the challenge of multiple stable secondary phases, short minority carrier diffusion length poses an obstacle practical application. This work addresses issue by synthesizing nanostructured thin films, which enables increased charge collection. A simple solution-processing method involving preparation CuCl CuCl2 molecular inks in thiol-amine...
Cu<sub>2</sub>O/a-Ta<sub>2</sub>O<sub>5</sub> heterostructures exhibited a quantum efficiency level of 3% for overall water splitting under visible light irradiation (400–480 nm).
Antimony selenide (Sb2Se3) has recently been intensively investigated and achieved significant advancement in photoelectrochemical (PEC) water splitting. In this work, a facile one-step hydrothermal method for the preparation of Sn-doped Sb2Se3 photocathodes with improved PEC performance was investigated. We present an in-depth study enhancement using capacitance–voltage (CV), drive-level capacitance profiling (DLCP), electrochemical impedance spectroscopy (EIS) techniques. The incorporation...
Host-guest complexation offers a promising approach for mitigating surface defects in perovskite solar cells (PSCs). Crown ethers are the most widely used macrocyclic hosts complexing surfaces, yet their supramolecular interactions and functional implications require further understanding. Here we show that dipole moment of crown serves as an indicator with both perovskites precursor salts. A larger moment, achieved through substitution heteroatoms, correlates enhanced coordination lead...
Sb 2 Se 3 photocathode performance improves by tuning substrate temperature during metal deposition. Thinner nanorods result in reduced charge recombination, enhancing photocurrent restricting transport the hk 0 direction.
TiO2 has been widely used as an n-type overlayer, simultaneously serving a protective layer for photocathodes. However, the photovoltage generated from junction with p-type absorbers, such p-Si, Sb2Se3, SnS, and Cu2O, is insufficient. We report dipole reorientation strategy to overcome this limitation by inserting polyethylenimine ethoxylated (PEIE) between absorber TiO2. Furthermore, we demonstrate that PEIE orientation can be rearranged increasing thickness, leading upward shift of band...
Increases in photovoltage and photocurrent were obtained a photocathode with the structure of Cu<sub>2</sub>O/Ga<sub>2</sub>O<sub>3</sub>/AZO/TiO<sub>2</sub> fabricated by pulsed laser deposition.
The dual-working-electrode technique enables the deconvolution of intrinsic properties buried p–n junction and electrocatalyst on surface for water splitting photocathodes.
P-type sulphur-nitrogen (S-N) co-doped ZnO thin films are deposited and the effect of sulphur on electrical properties is discussed. First-principles calculations indicate that structure most stable when S atom close to N in (0002) plane, implying dual-doped relatively feasible approach. The partial density states S-N shows impurity plays a vital role forming p-type conductivity.
Cu
Antimony selenide (Sb2Se3) has recently been intensively investigated and achieved significant advancement in photoelectrochemical (PEC) water splitting. In this work, a facile one-step hydrothermal method for the preparation of Sn-doped Sb2Se3 photocathodes with improved PEC performance was investigated. We present an in-depth study enhancement using capacitance-voltage (CV), drive level capacitance profiling (DLCP), electrochemical impedance spectroscopy (EIS) techniques. The incorporation...
Antimony selenide (Sb2Se3) has recently been intensively investigated and achieved significant advancement in photoelectrochemical (PEC) water splitting. In this work, a facile one-step hydrothermal method for the preparation of Sn-doped Sb2Se3 photocathodes with improved PEC performance was investigated. We present an in-depth study enhancement using capacitance-voltage (CV), drive level capacitance profiling (DLCP), electrochemical impedance spectroscopy (EIS) techniques. The incorporation...
We report a facile method to enhance the photoelectrochemical (PEC) performance of Sb2Se3 photocathodes by controlling growth bilayer consisting vertically oriented nanorods on compact layer. thin films with controllable nanorod diameters were achieved manipulating substrate temperature during metallic Sb film deposition. The lower temperature-derived photocathode, larger diameter (202 ± 48 nm), demonstrated photocurrent density -15.2 mA cm−2 at 0 VRHE and an onset potential 0.21 VRHE. In...
Abstract Host‐guest complexation offers a promising approach for mitigating surface defects in perovskite solar cells (PSCs). Crown ethers are the most widely used macrocyclic hosts complexing surfaces, yet their supramolecular interactions and functional implications require further understanding. Here we show that dipole moment of crown serves as an indicator with both perovskites precursor salts. A larger moment, achieved through substitution heteroatoms, correlates enhanced coordination...
As it is expected to be one of the most promising materials for utilizing solar energy, Cu2O has attracted considerable attention with respect achievement energy conversion. Until now, photocurrent densities all planar structure photocathode have not even come close theoretical value -14.7 mA cm-2 due incompatible light absorption and charge carrier diffusion lengths. Here, we fabricated p-n homojunction nanocomposite by multiple steps electrochemical deposition processing optimization...
The interfacial properties of the heterojunction between p-type and n-type materials play an important role in performance solar cell. In this paper, a CuInS2 film was deposited on TiO2 nanorod arrays by spin coating to fabricate all-solid-state cell were treated with hydrogen plasma(H:TiO2) ameliorate properties. influence plasma treatment investigated. short-circuit current density obviously raised power conversion efficiency improved 0.30%, which is three times that cells without...