Themed collection Journal of Materials Chemistry C Lunar New Year collection 2022
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Alkyl-π functional molecular liquids towards soft electronics
Free deformable, stretchable soft electronic devices are targeted by utilizing alkyl-π functional molecular liquids.
J. Mater. Chem. C, 2021,9, 10661-10667
https://doi.org/10.1039/D1TC00998B
Opportunities and challenges in perovskite LED commercialization
Perovskite LEDs represent a promising avenue for high efficiency and low-cost devices with excellent properties. The perovskite material's impact on lighting and advanced applications needs to be recognized to allow its entry to next-generation display technology.
J. Mater. Chem. C, 2021,9, 3795-3799
https://doi.org/10.1039/D1TC00232E
Emerging electronic applications of fullerene derivatives: an era beyond OPV
This review highlights the important role of fullerene derivatives in several emerging research directions beyond OPV and summarizes recent progresses in the development of fullerene derivatives to boost device performance in these new fields.
J. Mater. Chem. C, 2021,9, 16143-16163
https://doi.org/10.1039/D1TC04038C
Lanthanide-doped nanoparticles in photovoltaics – more than just upconversion
This review summarizes recent advances in developing high-efficiency upconversion nanoparticles and nanomaterials for photovoltaic application.
J. Mater. Chem. C, 2021,9, 16110-16131
https://doi.org/10.1039/D1TC02441H
Low-cost materials for organic solar cells
This review summarizes the recent advances in low-cost materials for OSCs from the aspects of the synthetic method, active materials, interfacial materials and processing solution.
J. Mater. Chem. C, 2021,9, 15395-15406
https://doi.org/10.1039/D1TC04097A
Recent advances in humidity sensors for human body related humidity detection
In this review, we summarized the recent progress in a humidity sensor for human body related humidity detections (including respiratory behavior, speech recognition, skin moisture, non-contact switch, and diaper monitoring).
J. Mater. Chem. C, 2021,9, 14963-14980
https://doi.org/10.1039/D1TC04180K
Heterostructures of titanium-based MXenes in energy conversion and storage devices
Due to the increasing market demand for Mxene-based devices, van der Waals heterostructures based on 2D materials have increased rapidly worldwide during the last decade due to their wide range of demand in the fields of optoelectronics, catalysis, and energy storage devices.
J. Mater. Chem. C, 2021,9, 8395-8465
https://doi.org/10.1039/D1TC00327E
A review on solution-processed perovskite/organic hybrid photodetectors
This review summarizes the progress in solution-processed perovskite/organic hybrid photodetectors in terms of fundamental operation principles, material combinations and device architectures. The challenges and possible solutions are also analyzed.
J. Mater. Chem. C, 2021,9, 5302-5322
https://doi.org/10.1039/D1TC00643F
Recent advances in room temperature phosphorescent carbon dots: preparation, mechanism, and applications
This review summarizes recent developments in room temperature phosphorescent carbon dots, including their preparation strategies, luminous mechanism, and applications.
J. Mater. Chem. C, 2021,9, 4425-4443
https://doi.org/10.1039/D0TC06031C
Intrinsically stretchable polymer semiconductors: molecular design, processing and device applications
This review surveys the current developments of intrinsic stretchable polymer semiconductors, including backbone and side-chain engineering, polymer blending, fabrication processes and their next-generation biomimicking applications.
J. Mater. Chem. C, 2021,9, 2660-2684
https://doi.org/10.1039/D0TC06059C
Efficient wide-bandgap copolymer donors with reduced synthesis cost
Two wide-bandgap copolymer donors with reduced synthesis cost offered decent PCEs up to 15.25% in organic solar cells.
J. Mater. Chem. C, 2021,9, 16187-16191
https://doi.org/10.1039/D1TC01746B
Aliovalent-cation-substitution-induced structure transformation: a new path toward high-performance IR nonlinear optical materials
A quaternary IR-NLO thioantimonate, K2Ag3Sb3S7, designed using an aliovalent-cation-substitution-induced (ACSI) strategy based on the centrosymmetric K2Sb4S7 is reported.
J. Mater. Chem. C, 2021,9, 15407-15414
https://doi.org/10.1039/D1TC04498B
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Controlling through-space and through-bond intramolecular charge transfer in bridged D–D′–A TADF emitters
Donor–donor′–acceptor molecules where the donor′ bridges the donor and acceptor have different possible interaction pathways for charge transfer.
J. Mater. Chem. C, 2021,9, 8819-8833
https://doi.org/10.1039/D1TC02316K
Highly sensitive all-polymer photodetectors with ultraviolet-visible to near-infrared photo-detection and their application as an optical switch
All-polymer photomultiplication type photodetectors were built based on PMBBDT:N2200 (100 : 3, w/w) as photoactive layers, which can be applied in optical switch systems without any current pre-amplifier.
J. Mater. Chem. C, 2021,9, 5349-5355
https://doi.org/10.1039/D1TC00939G
Cohosts with efficient host-to-emitter energy transfer for stable blue phosphorescent organic light-emitting diodes
We present a high-performance blue phosphorescent organic light-emitting diode exhibiting a low operating voltage (4.1 V), high external quantum efficiency (23.4%, at 500 cd m−2) with a low efficiency roll-off (4.7%), and a long operation lifetime (time at which the luminance reaches 95% of its initial value, LT95 = 232 h).
J. Mater. Chem. C, 2021,9, 17412-17418
https://doi.org/10.1039/D1TC04680B
Functionalized hybrid perovskite nanocrystals with organic ligands showing a stable 3D/2D core/shell structure for display and laser applications
A simple one-pot synthesis of stable red-emitting perovskite nanocrystals involved the addition of Cs-oleate, formamidinium bromide (FABr) and organic ammonium iodide salts (LnI, n = 1–5) to a hot flask containing oleic acid, oleylamine and PbI2.
J. Mater. Chem. C, 2021,9, 17341-17348
https://doi.org/10.1039/D1TC04049A
Efficient blue thermally activated delayed fluorescent emitters based on a boranaphtho[3,2,1-de]anthracene acceptor
Efficient blue thermally activated delayed fluorescent emitters based on organic boron-acceptor are developed with high external quantum efficiencies and finely tuned CIE coordinates.
J. Mater. Chem. C, 2021,9, 17136-17142
https://doi.org/10.1039/D1TC04699C
Effects of alkyl side chains of double-cable conjugated polymers on the photovoltaic performance of single-component organic solar cells
The effects of alkyl side units in double-cable conjugated polymers on the photovoltaic performance of single-component organic solar cells were systematically studied.
J. Mater. Chem. C, 2021,9, 16240-16246
https://doi.org/10.1039/D1TC01195B
Anomalous n-type conversion of thermoelectric polarity in ionic hydrogels using PEDOT:PSS electrodes
The intrinsically positive Seebeck coefficient of ionic material was successfully converted into negative by using PEDOT:PSS electrodes, offering a useful method for the development of a thermally chargeable supercapacitor with n-type polarity.
J. Mater. Chem. C, 2021,9, 15813-15819
https://doi.org/10.1039/D1TC01385H
Constitutional isomers of carbazole–benzoyl-pyrimidine-based thermally activated delayed fluorescence emitters for efficient OLEDs
Two pairs of constitutional isomeric TADF dopants (35CzBPym and 25CzBPym; 35tCzBPym and 25tCzBPym) containing benzoyl pyrimidine (BPym) as an acceptor and carbazoles (Czs) as donors were designed for high-efficiency OLEDs.
J. Mater. Chem. C, 2021,9, 15900-15909
https://doi.org/10.1039/D1TC03998A
Solid-state near infrared emitting platinum(II) complexes as either an ultrathin or singly doped phosphorescence emitting layer in hybrid white OLEDs exhibiting high efficiency and colour rendering index
Two platinum complexes PBSNND and AtFNND have been used to achieve high efficiency (EQEmax of 12.9% and 13.7%) hybrid white OLEDs with an ultrathin and singly doped phosphorescence emitting layer, respectively.
J. Mater. Chem. C, 2021,9, 15470-15476
https://doi.org/10.1039/D1TC03068J
Exciton energy transfer and bi-exciton annihilation in the emitting layers of thermally activated delayed fluorescence-based OLEDs
Time-resolved fluorescence anisotropy measurements and molecular dynamics simulations are used to study the energy transfer among dopant molecules in the emitting layer of organic light emitting diodes.
J. Mater. Chem. C, 2021,9, 15141-15149
https://doi.org/10.1039/D1TC03626B
Investigation on the nonlinear optical properties of V2C MXene at 1.9 μm
The nonlinear optical properties of a vanadium-based MXene, V2C, were investigated at 1.9 μm wavelength both theoretically and experimentally.
J. Mater. Chem. C, 2021,9, 15346-15353
https://doi.org/10.1039/D1TC03610F
Mechanistic studies of CsPbBr3 superstructure formation
This work proves that the amount of PbBr2 is crucial for CsPbBr3 superstructure formation although an excess of PbBr2 prevents superstructure formation.
J. Mater. Chem. C, 2021,9, 14699-14708
https://doi.org/10.1039/D1TC03066C
A do-it-yourself approach to achieving a flexible pressure sensor using daily use materials
In order to solve the shortcomings of the complex manufacturing process and high cost of flexible pressure sensors, a low-cost and eco-friendly flexible pressure sensor is achieved using a simple do-it-yourself (DIY) approach.
J. Mater. Chem. C, 2021,9, 13659-13667
https://doi.org/10.1039/D1TC03102C
Ultrastable, stretchable, highly conductive and transparent hydrogels enabled by salt-percolation for high-performance temperature and strain sensing
Salt-percolated hydrogels show excellent anti-freezing and anti-drying abilities, high conductivity at ultralow temperatures (−78.5 °C), and excellent thermal and strain sensing performance, which can monitor various physiological signals.
J. Mater. Chem. C, 2021,9, 13668-13679
https://doi.org/10.1039/D1TC02506F
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Nature of the surface space charge layer on undoped SrTiO3 (001)
Chemically stable SrO1+x surface oxide with c(6×2) superstructure is formed, creating space charge layer and surface band bending effects on undoped SrTiO3 (001), under elevated oxygen pressure and temperature conditions.
J. Mater. Chem. C, 2021,9, 13094-13102
https://doi.org/10.1039/D1TC03436G
Interpenetrating PAA-PEDOT conductive hydrogels for flexible skin sensors
Conductive hydrogels are promising material candidates in artificial skin and muscles, flexible and implantable bioelectronics, and tissue engineering.
J. Mater. Chem. C, 2021,9, 11794-11800
https://doi.org/10.1039/D1TC01578H
Greatly enhanced dielectric charge storage capabilities of layered polymer composites incorporated with low loading fractions of ultrathin amorphous iron phosphate nanosheets
Greatly enhanced dielectric charge storage capabilities are achieved in composites via introducing ultra-thin FePO4 nanosheets and designing bilayer structures.
J. Mater. Chem. C, 2021,9, 10414-10424
https://doi.org/10.1039/D1TC01974K
Complementary effect of co-doping aliovalent elements Bi and Sb in self-compensated SnTe-based thermoelectric materials
Engineering the electronic properties of SnTe through Bi and Sb co-doping to improve the thermoelectric performance.
J. Mater. Chem. C, 2021,9, 9922-9931
https://doi.org/10.1039/D1TC01676H
Organic photovoltaics with 300 nm thick ternary active layers exhibiting 15.6% efficiency
High-performance OPVs with relatively thick active layers are essential for large-scale production. A PCE of 15.63% is achieved by the optimized ternary OPVs with 300 nm thick active layers by combining the superiorities of two binary thick-film OPVs.
J. Mater. Chem. C, 2021,9, 9892-9898
https://doi.org/10.1039/D1TC02748D
Regioregular, yet ductile and amorphous indacenodithiophene-based polymers with high-mobility for stretchable plastic transistors
Regioregular yet near-amorphous indacenodithiophene-based polymers exhibit superior deformability as well as high mobility values up to 1.67 cm2 V−1 s−1.
J. Mater. Chem. C, 2021,9, 9670-9682
https://doi.org/10.1039/D1TC01984H
Facile synthesis of multi-resonance ultra-pure-green TADF emitters based on bridged diarylamine derivatives for efficient OLEDs with narrow emission
A series of multi-resonance ultra-pure-green TADF emitters based on bridged diarylamine derivatives is successfully developed for high efficiency and narrow emission OLEDs which exhibit a high EQE over 20% and narrow FWHM of less than 50 nm.
J. Mater. Chem. C, 2021,9, 8308-8313
https://doi.org/10.1039/D1TC01427G
Thenil and furil-imidazole-based efficient ionic green emitters with high color purity for non-doped light-emitting electrochemical cells
Future artificial lighting devices ought to be efficient, economical, environmentally benign and free of rare metals like iridium.
J. Mater. Chem. C, 2021,9, 8265-8273
https://doi.org/10.1039/D1TC01629F
Novel anti-Kasha fluorophores exhibiting dual emission with thermally activated delayed fluorescence through detouring triplet manifolds
A series of donor–coumarin dyads exhibit dual emission with thermally activated delayed fluorescence which emerges from the π–π* and intramolecular charge-transfer transition states.
J. Mater. Chem. C, 2021,9, 7083-7093
https://doi.org/10.1039/D1TC00660F
High-temperature, thin, flexible and transparent Ni-based heaters patterned by laser-induced reductive sintering on colorless polyimide
A novel method for the fabrication of high-temperature, lightweight, flexible and transparent Ni-based heaters via the laser digital patterning process of solution-processed NiOx nanoparticle thin films on colorless polyimide has been developed.
J. Mater. Chem. C, 2021,9, 5652-5661
https://doi.org/10.1039/D1TC00435B
Tuning luminescence from NIR-I to NIR-II in Cr3+-doped olivine phosphors for nondestructive analysis
We report a series of Cr3+-doped olivine phosphors with tunable luminescence from 940 to 1100 nm. They have promising applications in the field of food processing for both qualitative identification and quantitative analysis.
J. Mater. Chem. C, 2021,9, 5469-5477
https://doi.org/10.1039/D1TC00521A
Low-operating temperature ammonia sensor based on Cu2O nanoparticles decorated with p-type MoS2 nanosheets
Cu2O/MoS2 hybrids are used for the low-operating temperature detection of NH3. A sensing response of 872% is achieved for the M-5 sensor, displaying an improvement compared with bare Cu2O (103%). The selectivity is also increased for M-5 sensor.
J. Mater. Chem. C, 2021,9, 4838-4846
https://doi.org/10.1039/D1TC00391G
Highly stretchable, transparent and conductive double-network ionic hydrogels for strain and pressure sensors with ultrahigh sensitivity
Transparent ionic conductive hydrogel sensor is fabricated by one-pot polymerization, which shows high stretchability and reliable sensitivity. Therefore, it can detect subtle human activities, such as pulse, speaking, and facial expressions.
J. Mater. Chem. C, 2021,9, 3635-3641
https://doi.org/10.1039/D0TC05242F
Luminance efficiency roll-off mechanism in CsPbBr3−xClx mixed-halide perovskite quantum dot blue light-emitting diodes
Efficiency roll-off is a significant issue in blue light-emitting diodes (LEDs), but its origin still remains controversial.
J. Mater. Chem. C, 2021,9, 3608-3619
https://doi.org/10.1039/D0TC05514J
A TTF–TCNQ complex: an organic charge-transfer system with extraordinary electromagnetic response behavior
Charge-transfer based molecular conductors have attracted great attention in recent years, but have been rarely explored in the field of electromagnetic materials.
J. Mater. Chem. C, 2021,9, 3316-3323
https://doi.org/10.1039/D0TC05230B
Highly thermally conductive liquid metal-based composites with superior thermostability for thermal management
Mechanically strong and thermostable composites are prepared for thermal management based on soft liquid metal and rigid aramid nanofibers.
J. Mater. Chem. C, 2021,9, 2904-2911
https://doi.org/10.1039/D0TC05493C
Effect of commensurate lithium doping on the scintillation of two-dimensional perovskite crystals
Commensurate Lithium doping of two-dimensional lead halide perovskites leads to improved scintillation properties, with enhanced light yield, narrower energy resolution, higher radiation hardness and faster scintillation decay.
J. Mater. Chem. C, 2021,9, 2504-2512
https://doi.org/10.1039/D0TC05647B
Predicted septuple-atomic-layer Janus MSiGeN4 (M = Mo and W) monolayers with Rashba spin splitting and high electron carrier mobilities
In this work, Janus monolayers are predicted for a new 2D MA2Z4 family by means of first-principles calculations. The predicted MSiGeN4 (M = Mo and W) monolayers exhibit dynamic, thermodynamic and mechanical stability, and they are indirect band-gap semiconductors.
J. Mater. Chem. C, 2021,9, 2464-2473
https://doi.org/10.1039/D0TC05649A
2D layered metal-halide perovskite/oxide semiconductor-based broadband optoelectronic synaptic transistors with long-term visual memory
High-performance optoelectronic synaptic transistors are reported with a long-term memory by using organic–inorganic halide perovskites and oxide semiconductors.
J. Mater. Chem. C, 2021,9, 1429-1436
https://doi.org/10.1039/D0TC04250A
Improving the performance of photonic transistor memory devices using conjugated block copolymers as a floating gate
We report the synthesis, morphology and photo-memory device applications of a block copolymer (BCP) consisting of poly(9,9-dioctylfluorene) (PFO) and polystyrene (PS).
J. Mater. Chem. C, 2021,9, 1259-1268
https://doi.org/10.1039/D0TC05326K
A dual-emitting mixed-lanthanide MOF with high water-stability for ratiometric fluorescence sensing of Fe3+ and ascorbic acid
A novel Eu0.07Gd0.03-MOF with high water stability, which can serve as ratiometric fluorescence sensor for “color-change-recover” detection of Fe3+ and ascorbic acid in an aqueous environment.
J. Mater. Chem. C, 2021,9, 562-568
https://doi.org/10.1039/D0TC04781C
High efficiency and long lifetime orange-red thermally activated delayed fluorescent organic light emitting diodes by donor and acceptor engineering
Molecular design approach for the simultaneous achievement of high efficiency and long lifetime in the long wavelength region.
J. Mater. Chem. C, 2021,9, 528-536
https://doi.org/10.1039/D0TC04465B
Impact of grain size on the optoelectronic performance of 2D Ruddlesden–Popper perovskite-based photodetectors
This paper presents the synthesis of grain size-controlled 2D perovskite films for high-performance photodetectors by combining solvent engineering and hot casting.
J. Mater. Chem. C, 2021,9, 110-116
https://doi.org/10.1039/D0TC04350H
A highly efficient and thermally stable broadband Cr3+-activated double borate phosphor for near-infrared light-emitting diodes
GdAl3(BO3)4:Cr3+ is used to fabricate a NIR-pc-LED that shows promise for plant lighting and applications in the nondestructive analysis of agricultural products.
J. Mater. Chem. C, 2021,9, 164-172
https://doi.org/10.1039/D0TC04803H
About this collection
To mark the Lunar New Year, this web collection features the top 50 most popular articles published in Journal of Materials Chemistry C in 2021 by corresponding authors based in countries celebrating the Lunar New Year.
Congratulations to all of the authors whose articles have been featured!