Enhanced photovoltaic conversion efficiency in bulk heterojunction solar cells upon incorporating nanohybridized PbS quantum dots/multiwall carbon nanotubes

Baral, Jayanta K.; Sharma, Ankit; Wang, Defa; Ma, Dongling; Truong, Vo‐Van; Izquierdo, Ricardo

doi:10.1051/epjap/2013130517

Cited by 9 publications

(2 citation statements)

References 48 publications

(98 reference statements)

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“…The figure shows that the maximum absorption wavelength is in the range of 400 -1100 nm, which is mean the network absorbed the spectrum in Vis-NIR region. This result in agreement with [11]. Many sharp peaks have appeared in the absorbance spectrum, such as 400, 475, 525, 750, 800, 850, 950 and 1100 nm, respectively, these peaks may be attributed to the network structure as a mat.…”

Section: Resultssupporting

confidence: 89%

Specific NH<sub>3</sub> Gas Sensor Worked at Room Temperature Based on MWCNTs-OH Network

Al-Husseini

Al-Sammarraie

Saleh

2018

NHC

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Functionalized Multi-Walled Carbon Nanotubes (MWCNTs-OH) network with thickness 4μm was made by the vacuum filtration from suspension (FFS) method. The morphology, structure and optical properties of the MWCNTs film were characterized by SEM and UV-Vis. spectra techniques. The SEM images reflected highly ordered network in the form of ropes or bundles with close-packing which looks like spaghetti. The absorbance spectrum revealed that the network has a good absorbance in the UV-Vis. region. The gas sensor system was used to test the MWCNT-OH network to detect NH3gas at room temperature. The resistance of the sensor was increased when exposed to the NH3gas. The sensitivities of the network were 1.3% at 14ppm, 3.3% at 27ppm and 6.13% at 68ppm. The sensor is specifically sensitive to NH3gas and does not affect by the amount of ambient air.

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Section: Resultssupporting

confidence: 89%

Specific NH<sub>3</sub> Gas Sensor Worked at Room Temperature Based on MWCNTs-OH Network

Al-Husseini

Al-Sammarraie

Saleh

2018

NHC

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“…Despite the high theoretical specific capacity of 1672 mA h g –1 and energy density of 2600 W h kg –1 for LSBs, the sulfur in cathodes as the reservoir for lithium faces several problems, − including the ionically and electrically insulating effects of sulfur (5 × 10 –30 S·cm –1 at 25 °C), the formation of soluble intermediate polysulfides (Li 2 S x , 4 ≤ x ≤ 8), and a large volumetric expansion upon the formation of Li 2 S. , These problems are reflected in the low rate capacity, low Columbic efficiency, self-discharge, rapid capacity fading, , damages to the material structure, and continuous loss of sulfur . Many research works have been reported concerning these issues. − So, embedding as many sulfur as possible into various inorganic, − carbon, − or polymer ,− host materials and trapping of polysulfides in these mesoporous host materials are among the prevailing solutions to the problems. − Polymers, in this case, are extensively studied as binders, − coatings ,− on sulfur active materials, separator, or electrolyte; ,,, there are limited reports on polymer cathode in LSB. ,, But, when used as cathode materials, polymers are rather promising due to their available structural and electrochemical controlling parameters. − …”

Section: Introductionmentioning

confidence: 99%

Sulfur in Hyper-cross-linked Porous Polymer as Cathode in Lithium–Sulfur Batteries with Enhanced Electrochemical Properties

Zeng

Wang

Gou

et al. 2017

ACS Appl. Mater. Interfaces

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Sulfur was impregnated into hyper-cross-linked porous polymer (HCP) with a high specific area and unique porous structure. Compared to its inorganic or carbon counterparts, the HCP has a relatively high specific surface area of 1980 m g with a total pore volume of 2.61 cm g, resulting in sulfur content in HCP/S of as high as 80 wt %. As a benefit of the unique HCP structure, the HCP/S composite exhibits a high initial discharge specific capacity (1333 mA h g at 0.2 C), high-rate property, and good cycling stability (658 mA h g after 120 cycles at 0.5 C and 604 mA h g after 80 cycles at 1 C). Furthermore, the capacity of cells loses less than 1% after the first 20 charge/discharge cycles, while the HCP/S cathode can be cycled with an excellent Coulombic efficiency of above 94% after 120 cycles. Compared with pristine sulfur, the superior electrochemical performance of HCP/S composite is related to the cross-linked porous framework. Such structure could provide short ionic/electronic conduction pathways and suppress the polysulfide shuttle during the discharge process.

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Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

Pan,

Hasan,

Ghosh

et al. 2024

ChemistrySelect

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Efficient energy harvesting through full solar spectrum utilization has been considered a promising solution to world energy and environmental issues. In this direction, lead sulphide (PbS) quantum dot (QD) based hybrid materials find greater application due to their near‐infrared (NIR) active photo response. Slower charge injection and inefficient charge separation limit photoactive response of such NIR active low band gap semiconductor like PbS QDs. Moreover, constructing dual charge transfer pathways in a PbS QDs based nanocomposite through the formation of hybrids with suitable materials can be advantageous in suppressing the charge recombination. In this work, we have synthesized a nanocomposite after decorating the PbS‐QDs with semiconducting TiO2 nanoparticles modified with multiwall carbon nanotubes (MWCNT) and thus forming the tri‐hybrid (PbS‐TiO2‐MWCNT) nanocomposites. The enhanced photo‐activities of the tri‐hybrid, as compared to di‐hybrids like PbS‐TiO2, PbS‐MWCNT were confirmed by the steady state, time‐resolved photoluminescence (TRPL) measurements and reactive oxygen species (ROS) generation measurements. Higher ROS generation in the tri‐hybrid has been correlated with a faster interfacial electron transfer due to the dual charge injection pathway of PbS QD to TiO2 and MWCNT. The enhanced activity of the trio‐hybrid has also been analyzed from the first principal calculations in light of an efficient interfacial electron transfer as a result of the dual charge injection pathway. The photoelectrochemical water‐spilling response of the photoanodes in terms of photocurrent density, electrochemical impedance, and Mott–Schottky measurements on PbS‐TiO2 and PbS‐TiO2‐MWCNT photoanodes reveal that a combination of MWCNT and TiO2 exhibits an increase in electrical double layer capacitance, decrease in series resistance and enhancement of carrier density with NIR illumination at the heterojunction. Overall, all the dynamical studies at the interface of the trihybrid‐based photoanodes demonstrate its potential of utilization as a futuristic NIR‐ active photoelectrochemical water‐splitting material.

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Enhanced photovoltaic conversion efficiency in bulk heterojunction solar cells upon incorporating nanohybridized PbS quantum dots/multiwall carbon nanotubes

Cited by 9 publications

References 48 publications

Specific NH<sub>3</sub> Gas Sensor Worked at Room Temperature Based on MWCNTs-OH Network

Specific NH<sub>3</sub> Gas Sensor Worked at Room Temperature Based on MWCNTs-OH Network

Sulfur in Hyper-cross-linked Porous Polymer as Cathode in Lithium–Sulfur Batteries with Enhanced Electrochemical Properties

Near‐Infrared Active Tri‐nanohybrid for Enhanced Energy Harvesting

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