Honglei Wang

• TU Ilmenau at Technische Universität Ilmenau

Semiconducting materials show high potential for solar energy harvesting due to their suitable bandgaps, which allow the efficient utilization of light energy larger than their bandgaps. However, the photon energy smaller than their bandgap is almost unused, which significantly limits their efficient applications. Herein, plasmonic Pd/SnS2 microcub...

2D metal phosphorous trichalcogenides (MPCh3) have attracted considerable attention in sustainable energy storage and conversion due to their distinct physical and chemical characteristics, such as adjustable energy bandgap, significant specific surface area, and abundant active sites. However, research on 2D MPCh3 primarily focuses on electrocatal...

2D nanomaterials are proposed as promising photothermal materials for interfacial photothermal water evaporation. However, low evaporation efficiency, the use of hazardous hydrofluoric solution, and poor stability severely limit their practical applications. Here, a mixed solvent exfoliation surface deposition (MSESD) strategy for the preparation o...

Two‐dimensional (2D) materials catalysts provide an atomic‐scale view on a fascinating arena for understanding the mechanism of electrocatalytic carbon dioxide reduction (CO2 ECR). Here, we successfully exfoliated both layered and nonlayered ultra‐thin metal phosphorous trichalcogenides (MPCh3) nanosheets via wet grinding exfoliation (WGE), and sys...

Two‐dimensional (2D) materials catalysts provide an atomic scale view on fascinating arena for understanding the mechanism of electrocatalytic carbon dioxide reduction (CO2 ECR). Here, we successfully exfoliated both layered and nonlayered ultra‐thin metal phosphorous trichalcogenides (MPCh3) nanosheets via wet grinding exfoliation (WGE), and syste...

Developing simple, large-scale, and environmentally-friendly ways to prepare two-dimensional (2D) semiconductive hexagonal phase MoS2 (2H-MoS2) nanocomposites remains a significant challenge. Herein, we propose a facile and green method for preparing few-layer MoS2 nanosheets via a pectin-assisted one-pot synthesis (PAOS), where pectin serves as th...

The morphology evolution by thermal annealing induced dewetting of gold (Au) thin films on silicon (Si) substrates with a native oxide layer and its dependences on annealing temperature and atmosphere are investigated. Both dewetting degree of thin film and Au/Si interdiffusion extent are enhanced with the annealing temperature. Au/Si interdiffusio...

The conversion of solar energy into electric power has been extensively studied, for example, by photovoltaics. However, photo-thermoelectric (P-TE) conversion as an effective solar-to-electricity conversion process is less studied. Here, we present an efficient full-solar-spectrum plasmonic absorber for scalable P-TE conversion based on a simple i...

Efficient exfoliations of bulk molybdenum disulfide (MoS2) into few‐layered nanosheets in pure phase are highly attractive because of the promising applications of the resulted 2D materials in diversified optoelectronic devices. Here, a new exfoliation method is presented to prepare semiconductive 2D hexagonal phase (2H phase) MoS2–cellulose nanocr...

Efficient and green exfoliation of bulk MoS2into few-layered nanosheets in the semiconducting hexagonal phase (2H-phase) remains a great challenge. Here, we developed a new method, water-assisted exfoliation (WAE), for the scalable synthesis of carboxylated chitosan (CC)/2H-MoS2nanocomposites. With facile hand grinding of the CC powder, bulk MoS2an...

Development of broadband absorption materials for solar energy harvesting is an important strategy to address global energy issues. Here, we demonstrate that an ultra‐black silicon structure with abundant surface texturing can absorb about 98.7% solar light within the wavelength range of 300 nm to 2500 nm, i.e. a very large range and amount. Under...

Controllable assembly and alignment of fullerenes is of fundamental importance in improving the optoelectronic device performance. Here, we found that conjugated macrocycles, 3B2A and 4B2A, could function as donors encapsulating electron-deficient fullerene to form a molecular-scale p−n junction, which enables fast electron transfer and enhanced ex...

During the past years, much research work has been focused on efficiently harvesting solar energy with black silicon (b-Si). However, semiconductor Si can only utilize solar energy with wavelength smaller than λ = 1110 nm (bandgap Eg = 1.12 eV) for photovoltaic applications or photoelectrochemical conversions. Light with wavelength beyond the band...

As a p-type transparent semiconducting material with wide bandgap, Copper(Ⅰ) thiocyanate (CuSCN) exhibits many advantages, including high transmittance, high conductivity, easy preparation at ambient temperature, solution processable and low cost. Therefore, CuSCN has been widely expected to be a strong alternative as hole-injecting/hole-transporti...

Efficient preparation of single-layer two-dimensional (2D) transition-metal dichalcogenides, especially molybdenum disulfide (MoS2), offers readily available 2D surface in nanoscale to template various materials to form nanocomposites with van der Waals heterostructures (vdWHs), opening up a new dimension for the design of functional electronic and...

Trace amounts of solvent additive can effectively regulate the phase-separated morphology of the active layer composed of donor and acceptor materials for improved power conversion efficiency (PCE) of polymer solar cells (PSCs). However, applicable solvent additives for PSCs are still limited and it is difficult to rationally design or select appro...

The cathode interfacial layer (CIL) plays a vital role in enhancing the efficiency and lifetime performance of bulk heterojunction (BHJ) polymer solar cells (PSCs). Here, we compared the use of various organic semiconducting molecules, tris(8-hydroxyquinolinato) aluminum (Alq3), bathocuproine (BCP) and 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPB)...

An equiatomic FeSiBAlNi amorphous high-entropy alloy (HEA) was fabricated by mechanical alloying (MA). A fully amorphous phase was obtained in the FeSiBAlNi HEA after 240 h of MA. The bulk FeSiBAlNi samples were sintered by spark plasma sintering (SPS) at 520 and 1080°C under a pressure of 80 MPa. The sample sintered at 520°C exhibited an amorphous...