High-performance stretchable photodetectors based on epitaxial CdTe ultrathin films

Wu, Yupeng; Liu, Yunjie; Liu, Yingming; Zhao, Shirong; Guo, Fuhai; Li, Siqi; Yu, Weizhuo; Liu, Guanchu; Hao, Jingyi; Hao, Lanzhong

doi:10.1039/d2tc01611g

Cited by 10 publications

(6 citation statements)

References 28 publications

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“…The integrated water splitting system using CC@NiO/Ni 3 S 2 as electrodes can improve the efficiency of H 2 generation with an electrical energy saving of 10% at 50 mA cm −2 . Similarly, when coupled with the HER, the formate from methanol/ glycerol by using Cu(OH) 2 @ FeNi(OH) x , [152] NiFe x P@NiCo-LDH, [153] CoPt nanoparticles, [154] and CoMoO 4 , [155] acetate /ethyl acetate from ethanol by using PtCu nanoframes, [156] lactic acid/formic acid/gluconate from glucose by using Co@NPC, [157] Co@CoO, [158] and Fe 0.1 -CoSe 2 on carbon cloth [159] have also been achieved with high efficiencies.…”

Section: Electrooxidation Of Alcoholsmentioning

confidence: 99%

Progress and Perspectives for Solar‐Driven Water Electrolysis to Produce Green Hydrogen

Zhao

Yuan

2023

Advanced Energy Materials

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energy system is among the most promising solutions to solve the above issues. Substituting the current energy carrier with a sustainable fuel is one of the crucial points in the system. Hydrogen as a green and high energy density carrier, primarily derived from water, can satisfy the requirement of sustainable development and facilitate environmental protection and energy conservation. Nowadays, hydrogen is mainly produced from numerous nonrenewable energy such as fossil fuels and biomass for practical applications. [1][2][3] Water electrolysis is a hopeful strategy for efficient and sustainable hydrogen production, but not cost-effective due to the need for large electricity consumption. [4,5] It remains challenging to achieve highly effective hydrogen production with lowcost and renewable energy.Sunlight is an endlessly renewable energy source, which can substitute fossil fuels. In this regard, coupling of sunlight and water electrolysis is desperately needed. The photovoltaic module coupled with water electrolyzers (PV-EC) to achieve the direct conversion of solar energy into hydrogen fuel is a good choice for sustainable energy system. The solar-driven water electrolysis can be achieved through the electrical power generated by a photovoltaic system for driving an external water electrolyzer. [6][7][8] The solar cells do not need to immerse into the electrolyte and not be vulnerable to corrosion in this configuration. However, the high cost of solar photovoltaic devices limits its practical applications. Integrated photoelectrochemical (PEC) devices comprising a photovoltaic device and a water electrolyzer in a single device have aroused much attention. [9][10][11] It allows the direct coupling of light absorbers and catalysts, which could reduce the cost and mechanical limitations. One of the most prominent works is the "artificial leaf", which comprises a triple junction and amorphous silicon photovoltaic interfaced to hydrogen-and oxygen-evolving catalyst for achieving an efficiency of 4.7%. [12] Considering the fluctuating output power and intrinsically intermittent nature of solar energy, a rechargeable energy storage device could be introduced to serve as a reservoir to offer a stable electrical output and accommodate solar energy. The PV-ES-EC system can thus be achieved through the fabrication of an efficient energy storage device to couple the photovoltaic device and water electrolyzer.Notably, the above solar-driven water electrolysis systems require highly conductive and stable separators, highly Solar-driven water electrolysis has been considered to be a promising route to produce green hydrogen, because the conventional water electrolysis system is not completely renewable as it requires power from nonrenewable fossil fuel sources. This review emphasizes the strategies for solar-driven water electrolysis, including the construction of photovoltaic (PV)-water electrolyzer systems, PV-rechargeable energy storage devicewater electrolyzer systems with solar energy as the sole input energy, and photo...

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Section: Electrooxidation Of Alcoholsmentioning

confidence: 99%

Progress and Perspectives for Solar‐Driven Water Electrolysis to Produce Green Hydrogen

Zhao

Yuan

2023

Advanced Energy Materials

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“…In this study, we selected cadmium telluride (CdTe) as a prototype material to elucidate the growth mechanism of semiconductor crystals. CdTe is a highly regarded material for optoelectronic and solar cell applications, thanks to its cost-effectiveness, ease of manufacture, high absorption coefficient, and optimal bandgap for photovoltaic conversion. , Despite these advantages, the peak energy conversion efficiency of CdTe solar cells (∼21%) falls notably short of the theoretical maximum (∼30%), as outlined by the Shockley-Queisser limit. This discrepancy is largely due to defects that arise during the deposition of CdTe films, particularly TBs. − Thus, it is critical to understand the growth process and mechanism of the CdTe films.…”

Section: Introductionmentioning

confidence: 99%

Elucidating Twinning Mechanisms in CdTe Homoepitaxial Film Growth from Machine Learning Force Field Molecular Dynamics Simulations

Li,

Luo,

2024

Crystal Growth & Design

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The process of twinning formation during the growth of semiconductor thin films, particularly in CdTe homoepitaxial films, is a complex phenomenon that has eluded comprehensive understanding. Here, this study investigated the growth dynamics of CdTe homoepitaxial films on (111) Cd-and Te-terminated surfaces across a range of substrate temperatures. We employed molecular dynamics and time-stamped force-bias Monte Carlo simulations with a machine-learning force field to explore these growth dynamics. Our findings reveal that CdTe homoepitaxial layers are characterized by lamella twins with (111) twin boundaries parallel to the surface. The development of stacking fault layers is potentially influenced by the presence of residual holes prior to the crystallization of subsequent layers. We also observed that (111) Te homoepitaxial layers exhibit more significant planar defects than (111) Cd homoepitaxial layers, and this disparity is more pronounced at lower substrate temperatures and can be attributed to the more reactive (111) Te-terminated surface. Moreover, there is a notable trend in which the prevalence of planar defects escalates with increasing substrate temperature, arising from the competing formation mechanism of CdTe zinc-blende and wurtzite structures. This work offers detailed atomiclevel insights into the growth and twinning mechanisms of CdTe homoepitaxial films.

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“…Owing to their large specific surface area, as well as outstanding optical, electronic, and mechanical properties, the use of semiconducting nanomaterials has received increasing attention in the removal of organic pollutants 20 . Due to its easily configurable size, extraordinary absorption coefficient, near-ideal bandgap for solar-terrestrial light conversion, excellent light-to-electricity conversion efficiency, and remarkable optical, electrical, and mechanical capabilities, CdTe has emerged as a potential candidate for solar light-responsive optoelectronic and photocatalytic applications 21 – 26 . In comparison to typical crystalline silicon-based solar cells, thin CdTe semiconductor layers employed in light-harvesting devices are capable of producing power from solar radiation at substantially lower costs.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison to typical crystalline silicon-based solar cells, thin CdTe semiconductor layers employed in light-harvesting devices are capable of producing power from solar radiation at substantially lower costs. In comparison to other PVs, CdTe PV has various benefits including a higher light-to-power conversion efficiency, a smaller carbon footprint, minimal water use, and a faster payback period for electricity 24 – 26 . Excitons are produced when CdTe is exposed to light of the appropriate wavelength, and they split into free electrons and holes.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of tetracycline antibiotics by RGO-CdTe composite with enhanced apparent quantum efficiency

Ghosh,

Chakraborty,

Pal

et al. 2023

Sci Rep

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RGO-CdTe composite was synthesized using a straightforward, easy-to-realize, one-pot solvothermal technique. The synthesized composite was characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Brunauer-Emmett-Teller method (BET), Raman spectra, UV-Vis absorption, and photoluminescence measurement. The RGO-CdTe composite exhibited 83.6% photocatalytic degradation efficiency for the aqueous tetracycline (TC) antibiotic solution and the apparent quantum yield (AQY) for the same was as high as 22.29% which is 2.63 times higher than that of CdTe. The scavenger investigation demonstrated that although hole acts as the leading active species, despite that, superoxide and hydroxyl radicals have also played crucial roles. The initial pH-dependent photocatalytic performance was measured. The zeta potential of the composite at different pH values was evaluated to establish the photocatalytic performance of the RGO-CdTe towards TC degradation at different pH. The recycling experiment depicts that only a 10% degradation performance declines after 5 times recycle use of the RGO-CdTe photocatalyst. An efficient photocurrent generation in RGO-CdTe thin film device has also been observed. Our study establishes as-synthesized composite of RGO-CdTe as a highly potential, and stable photocatalyst for the degradation of antibiotics from the polluted aqueous environment with a very good photoinduced charge generation efficiency in its solid phase.

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High-performance stretchable photodetectors based on epitaxial CdTe ultrathin films

Abstract: Due to its striking optical, electrical and mechanical properties, cadmium telluride (CdTe) has received tremendous interest in developing next-generation optoelectronic devices. However, the stretchable photodetectors (PDs) based on high-quality CdTe...

Cited by 10 publications

References 28 publications

Progress and Perspectives for Solar‐Driven Water Electrolysis to Produce Green Hydrogen

Progress and Perspectives for Solar‐Driven Water Electrolysis to Produce Green Hydrogen

Elucidating Twinning Mechanisms in CdTe Homoepitaxial Film Growth from Machine Learning Force Field Molecular Dynamics Simulations

Photocatalytic degradation of tetracycline antibiotics by RGO-CdTe composite with enhanced apparent quantum efficiency

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