Cheng-Yong Su

Sun Yat-Sen University, Shengcheng, Guangdong, China

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Publications (310)1482.53 Total impact

  • [Show abstract] [Hide abstract] ABSTRACT: Photocleavage of H2O into clean and storable H2 fuel by photoelectrochemical (PEC) cell is a vital part of the sustainable hydrogen economy. However, thus far one of the limitations confronted by PEC cell to preferable performance is the insufficient behavior of photoanode for water oxidation half-reaction. One of the strategies to elevate the photoanode performance is integrating with an oxygen evolution catalyst (OEC) to remove the bottleneck of the water oxidation kinetics. Herein, an ultrafine cobalt iron oxide (CIO) nanocrystalline is reported as a novel OEC for photoelectrochemical water splitting. The CIO evenly distributing on the surface of hematite nanorod arrays not only greatly facilitates the surface hole injection, but also promotes the charge separation along with passivating the surface states. Such combined effects of CIO finally lead to an impressive 1.71 fold enhancement on the photocurrent density at 1.23 VRHE and ≈170 mV negative shift of onset potential, even overwhelms the commonly utilized Co-Pi. Along with its excellent long-term stability, the CIO possesses a great potential application in PEC water splitting devices.
    No preview · Article · Apr 2016 · Advanced Functional Materials
  • Ling Chen · Cheng Yan · Mei Pan · Hai-Ping Wang · Ya-Nan Fan · Cheng-Yong Su
    [Show abstract] [Hide abstract] ABSTRACT: Multi-mode photoluminescence, including enol-emission, keto-emission, and aggregate-related emission is achieved in a ZnII coordination polymer from excited-state intramolecular proton transfer (ESIPT) ligands. Single-phase white light emission (WLE) and tunable emitting colors can be obtained by varying the suspending/grinding solvent system or temperature, which brings a brand-new model in developing multi-stimuli-responsive WLE materials.
    No preview · Article · Mar 2016 · Berichte der deutschen chemischen Gesellschaft
  • [Show abstract] [Hide abstract] ABSTRACT: The capacity of anode materials plays a critical role in the performance of lithium-ion batteries. Using the nanocrystals of oxygen-free metal-organic framework ZIF-67 as precursor, a one-step calcination approach toward the controlled synthesis of CoO nanoparticle cookies with excellent anodic performances is developed in this work. The CoO nanoparticle cookies feature highly porous structure composed of small CoO nanoparticles (≈12 nm in diameter) and nitrogen-rich graphitic carbon matrix (≈18 at% in nitrogen content). Benefiting from such unique structure, the CoO nanoparticle cookies are capable of delivering superior specific capacity and cycling stability (1383 mA h g(-1) after 200 runs at 100 mA g(-1) ) over those of CoO and graphite.
    No preview · Article · Mar 2016 · Small
  • [Show abstract] [Hide abstract] ABSTRACT: Two new electron-rich molecules based on 3,4-phenylenedioxythiophene (PheDOT) were synthesized and successfully adopted as hole-transporting materials (HTMs) in perovskite solar cells (PSCs). X-ray diffraction, absorption spectra, photoluminescence spectra, electrochemical properties, thermal stabilities, hole mobilities, conductivities, and photovoltaic parameters of PSCs based on these two HTMs were compared with each other. By introducing methoxy substituents into main skeleton, the energy levels of PheDOT-core HTM were tuned to match with the perovskite and its hole mobility was also improved (1.33 × 10-4 cm2 V-1 s-1, higher than that of spiro-OMeTAD, 2.34 × 10-5 cm2 V-1 s-1). The PSC based on MeO-PheDOT as HTM exhibits a short-circuit current density (Jsc) of 18.31 mA cm-2, an open-circuit potential (Voc) of 0.914 V and a fill factor (FF) of 0.636, yielding an encouraging power conversion efficiency (PCE) of 10.64% under AM 1.5 G illumination.
    No preview · Article · Feb 2016 · Chemistry - An Asian Journal
  • Source
    Kai Wu · Kang Li · Ya-Jun Hou · Mei Pan · Lu-Yin Zhang · Ling Chen · Cheng-Yong Su
    [Show abstract] [Hide abstract] ABSTRACT: Absolute chiral environments are rare in regular polyhedral and prismatic architectures, but are achievable from self-assembly of metal-organic cages/containers (MOCs), which endow us with a promising ability to imitate natural organization systems to accomplish stereochemical recognition, catalysis and separation. Here we report a general assembly approach to homochiral MOCs with robust chemical viability suitable for various practical applications. A stepwise process for assembly of enantiopure ΔΔΔΔΔΔΔΔ- and ΛΛΛΛΛΛΛΛ -Pd6 (RuL3)8 MOCs is accomplished by pre-resolution of the Δ/Λ -Ru-metalloligand precursors. The obtained Pd-Ru bimetallic MOCs feature in large D4 -symmetric chiral space imposed by the predetermined Ru(II)-octahedral stereoconfigurations, which are substitutionally inert, stable, water-soluble and are capable of encapsulating a dozen guests per cage. Chiral resolution tests reveal diverse host-guest stereoselectivity towards different chiral molecules, which demonstrate enantioseparation ability for atropisomeric compounds with C2 symmetry. NMR studies indicate a distinctive resolution process depending on guest exchange dynamics, which is differentiable between host-guest diastereomers.
    Preview · Article · Feb 2016 · Nature Communications
  • Mei Pan · Bin-Bin Du · Yi-Xuan Zhu · Mei-Qin Yue · Zhang-Wen Wei · Cheng-Yong Su
    [Show abstract] [Hide abstract] ABSTRACT: Two zwitterionic-type ligands featuring π-π* and intraligand charge-transfer (ILCT) excited states, namely 1,1'-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene)dipyridinium-4-olate (TMPBPO) and 1-dodecylpyridin-4(1 H)-one (DOPO), have been prepared and applied to the assembly of lanthanide coordination complexes in an effort to understand the ligand-direction effect on the structure of the Ln complexes and the ligand sensitization effect on the luminescence of the Ln complexes. Due to the wide-band triplet states plus additional ILCT excitation states extending into lower energy levels, broadly and strongly sensitized photoluminescence of f→f transitions from various Ln(3+) ions were observed to cover the visible to near-infrared (NIR) regions. Among which, the Pr, Sm, Dy, and Tm complexes simultaneously display both strong visible and NIR emissions. Based on the isostructural feature of the Ln complexes, color tuning and single-component white light was achieved by preparation of solid solutions of the ternary systems Gd-Eu-Tb (for TMPBPO) and La-Eu-Tb and La-Dy-Sm (for DOPO). Moreover, the visible and NIR luminescence lifetimes of the Ln complexes with the TMPBPO ligand were investigated from 77 to 298 K, revealing a strong temperature dependence of the Tm(3+) ((3) H4 ) and Yb(3+) ((2) F5/2 ) decay dynamics, which has not been explored before for their coordination complexes.
    No preview · Article · Jan 2016 · Chemistry - A European Journal
  • [Show abstract] [Hide abstract] ABSTRACT: A tetradentate symmetric ligand bearing both coordination and hydrogen bonding sites, N(1),N(3)-bis(1-(1H-benzimidazol-2-yl)-ethylidene)propane-1,3-diamine (H2bbepd) was utilized to synthesize a series of transition metal complexes, namely [Co(H2bbepd)(H2O)2]·2ClO4 (1), [Cu(H2bbepd)(OTs(-))]·OTs(-) (2),[Cu(bbepd)(CH3OH)] (3), [Cd(H2bbepd)(NO3)2]·CH3OH (4), [Cd(H2bbepd)(CH3OH)Cl]·Cl (5), and [Cd(bbepd)(CH3OH)2] (6). These complexes show similar discrete pincer-like coordination units, possessing different arrangements of hydrogen bonding donor and acceptor sites. With or without the aid of uncoordinated anions and solvent molecules, such mononuclear units have been effectively involved in the construction of hierarchical hydrogen bonding assemblies (successively via level I and level II), leading to discrete binuclear ring (complex 2), one-dimensional chain or ribbon (complexes 3, 4 and 6) and two-dimensional layer (complexes 1 and 5) aggregates.
    No preview · Article · Nov 2015 · CHIMIA International Journal for Chemistry
  • [Show abstract] [Hide abstract] ABSTRACT: An M4L4 type metal-organic cage (MOC-19) has been synthesized from one pot reaction of tri(pyridinylmethylene)phenylbenzeneamine (TPBA) with hydrated Zn(ClO4)2 at mild condition, and characterized by single-crystal X-Ray diffraction. Iodine capture studies show that the porous crystals of MOC-19 exhibit versatile behaviors to accumulate iodine species not only in vapor (for I2), but also in solution (for I2 and I3-), and anion-exchange test indicates the capacity to extract IO3- anions from aqueous solution. Enrichment of iodine species from KI/I2 aqueous solution proceeds facilely, revealing a pseudo-second order kinetics of I3- adsorption. Furthermore, the electrical conductivity of MOC-19 single crystal could be significantly altered by I2 inclusion.
    No preview · Article · Nov 2015 · Chemistry - An Asian Journal
  • [Show abstract] [Hide abstract] ABSTRACT: Correction for ‘Semidirected versus holodirected coordination and single-component white light luminescence in Pb(II) complexes’ by Ling Chen et al., New J. Chem., 2015, 39, 5287–5292.
    No preview · Article · Oct 2015 · New Journal of Chemistry
  • [Show abstract] [Hide abstract] ABSTRACT: Great attention to cost-effective high-efficiency solar power conversion of trihalide perovskite solar cells (PSCs) has been hovering at high levels in the recent 5 years. Among PSC devices, admittedly, TiO2 is the most widely used electron transport layer (ETL); however, its low mobility which is even less than that of CH3NH3PbI3 makes it not an ideal material. In principle, SnO2 with higher electron mobility can be regarded as a positive alternative. Herein, a SnO2 nanocolloid sol with ≈3 nm in size synthesized at 60 °C was spin-coated onto the fuorine-doped tin oxide (FTO) glass as the ETL of planar CH3NH3PbI3 perovskite solar cells. TiCl4 treatment of SnO2-coated FTO is found to improve crystallization and increase the surface coverage of perovskites, which plays a pivotal role in improving the power conversion efficiency (PCE). In this report, a champion efficiency of 14.69% (Jsc = 21.19 mA cm-2, Voc = 1023 mV, and FF = 0.678) is obtained with a metal mask at one sun illumination (AM 1.5G, 100 mW cm-2). Compared to the typical TiO2, the SnO2 ETL efficiently facilitates the separation and transportation of photogenerated electrons/holes from the perovskite absorber, which results in a significant enhancement of photocurrent and PCE.
    No preview · Article · Oct 2015 · Advanced Functional Materials
  • [Show abstract] [Hide abstract] ABSTRACT: Four novel thiocyanate-free cyclometallted Ru(II) complexes, D-bisCF3, D-CF3, D-OMe, and D-DPA, with two 4,4′-dicarboxylic acid-2,2′-bipyridine together with a functionalized phenylpyridine ancillary ligand, have been designed and synthesized. The effect of different substituents (R = bisCF3, CF3, OMe, and DPA) on the ancillary C^N ligand on the photophysical properties and photovoltaic performance is investigated. Under standard global AM 1.5 solar conditions, the device based on D-CF3 sensitizer gives a higher conversion efficiency of 8.74% than those based on D-bisCF3, D-OMe, and D-DPA, which can be ascribed to its broad range of visible light absorption, appropriate localization of the frontier orbitals, weak hydrogen bonds between -CF3 and -OH groups at the TiO2 surface, moderate dye loading on TiO2, and high charge collection efficiency. Moreover, the D-bisCF3 and D-CF3 based DSSCs exhibit good stability under 100 mW cm−2 light soaking at 60 °C for 400 h.
    No preview · Article · Jun 2015 · Electrochimica Acta
  • [Show abstract] [Hide abstract] ABSTRACT: Four Ru(ii)/Ir(iii) metalloligands have been designed and synthesized from polypyridine and bibenzimidazole (BiBzIm) organic ligands, which show strong visible light absorption via metal-to-ligand charge transfer (MLCT) transitions. Nd/Yb(iii) complexes were further assembled from these Ru(ii)/Ir(iii) metalloligands, and Ln(iii)-centered NIR emissions can be efficiently sensitized by (3)MLCT states of the metalloligands in the visible-light region. The energy transfer rates for the complexes are generally in the order Nd > Yb, which is due to the better matching between (3)MLCT states of Ru(ii)/Ir(iii) metalloligands and densely distributed excited states of Nd(iii) ions. Long decayed lifetimes on a μs scale and high quantum yields up to 1% are obtained in these lanthanide complexes, suggesting that the Ru(ii)/Ir(iii) metalloligands can serve as a good visible light harvesting antenna to efficiently sensitize Ln(iii)-based NIR luminescence.
    No preview · Article · Apr 2015 · Dalton Transactions
  • [Show abstract] [Hide abstract] ABSTRACT: Creating cavities in varying levels, from molecular containers to macroscopic materials of porosity, have long been motivated for biomimetic or practical applications. Herein, we report an assembly approach to multiresponsive supramolecular gels by integrating photochromic metal-organic cages as predefined building units into the supramolecular gel skeleton, providing a new approach to create cavities in gels. Formation of discrete O-Pd2 L4 cages is driven by coordination between Pd(2+) and a photochromic dithienylethene bispyridine ligand (O-PyFDTE). In the presence of suitable solvents (DMSO or MeCN/DMSO), the O-Pd2 L4 cage molecules aggregate to form nanoparticles, which are further interconnected through supramolecular interactions to form a three-dimensional (3D) gel matrix to trap a large amount of solvent molecules. Light-induced phase and structural transformations readily occur owing to the reversible photochromic open-ring/closed-ring isomeric conversion of the cage units upon UV/visible light radiation. Furthermore, such Pd2 L4 cage-based gels show multiple reversible gel-solution transitions when thermal-, photo-, or mechanical stimuli are applied. Such supramolecular gels consisting of porous molecules may be developed as a new type of porous materials with different features from porous solids. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    No preview · Article · Apr 2015 · Chemistry - A European Journal
  • Qing-Yuan Yang · Mei Pan · Shi-Chao Wei · Kang Li · Bin-Bin Du · Cheng-Yong Su
    [Show abstract] [Hide abstract] ABSTRACT: Multicolored photoluminescence tuning in a single-phase material has invaluable potential in display and security applications. By deliberate design of a multifunctional antenna ligand and precise control of mixed metal ionic compositions in lanthanide metal-organic frameworks (Ln-MOFs), we achieved dichromatic fine-tuning among red, green, or blue primary colors through growth of a series of isomorphous Ln-MOF crystals·solvents of formula [LnnLn'1-n(TTP)2·H2O]Cl3 (Ln = Ln' = Eu, Tb, and Gd, 1-3; Ln = Eu, Ln' = Tb, 4-8; Ln = Gd, Ln' = Eu, 9-11; Ln = Gd, Ln' = Tb, 12-14; 0 < n < 1; TTP = 1',1″-(2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene)tris(pyridine-4(1H)-one)). The linear dependence of the emissions were analyzed, and the mathematical matrix models were established, which are useful to control the synthetic conditions and to predict the color chromaticity coordinates under varied excitation wavelengths. The potential relevance of these multicolored photoluminescent Ln-MOFs to barcoded materials was demonstrated.
    No preview · Article · Mar 2015 · Inorganic Chemistry
  • [Show abstract] [Hide abstract] ABSTRACT: Four novel D-D-pi-A type organic dyes (DWH1-DWH4) were designed and synthesized, in which 3,6-bis(thiophene or hexylthiophene)-disubstituted carbazole moieties were used as the electron donor, bithiophene units or their derivatives as the pi-conjugated bridge, and a cyanoacrylic acid group as the electron acceptor. The photovoltaic performance data indicate that the tuning of the J(sc) and V-oc values can be conveniently accomplished by incorporation of long alkyl chains into sensitizer, which not only improves the molar extinction coefficients of the absorption and enhances the solubility but also increases the electron lifetime by leading to an effective spatial separation of the charges.
    No preview · Article · Mar 2015 · Dyes and Pigments
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    [Show abstract] [Hide abstract] ABSTRACT: The development of novel nanoarray photoanode with heterostructure on transparent conducting oxide (TCO) substrate provides a promising scheme to fabricate efficient energy conversion devices. Herein, we successfully synthesize the vertically aligned hierarchical TiO2 nanowire/ZnO nanorod or TiO2 nanowire/ZnO nanosheet hybrid arrays which are proved to be an excellent anode candidate for superior light utilization. Consequently, the quantum dot-sensitized solar cells (QDSSCs) based on such hybrid arrays exhibit an impressive power conversion efficiency (PCE) under AM 1.5G one sun illumination with improved short-circuit current density (JSC) and fill factor (FF) compared to pristine TiO2 nanowire arrays. Combined with the chemical bath deposited Cu2S counter electrode, the eventual PCE can be further optimized to as high as 4.57% for CdS/CdSe co-sensitized quantum dot solar cells.
    Full-text · Article · Feb 2015 · ACS Applied Materials & Interfaces
  • [Show abstract] [Hide abstract] ABSTRACT: Reactions of Cu(II), Cd(II), and Ni(II) with a new tetradentate ligand N1,N3-bis(1-(1H-benzimidazol-2-yl)ethylidene)propane-1,3-diamine (H2bbepd) afforded four mononuclear pincer-like complexes of [Cu(H2bbepd)(ClO4)]·CH3OH·ClO4 (1), [Cd(H2bbepd)(CH3OH)(ClO4)]·CH3OH·ClO4 (2), [Ni(H2bbepd)(H2O)2]·2ClO4 (3), and [Ni(H2bbepd)(NO3)2] (4), respectively. The labile small coordinated components (anions or solvent molecules) on the apical coordination site of metal ions in complexes 1-4 display three different modes, which can be substituted by 4,4′-bipyridine (bpy) to obtain four new multinuclear complexes of [Cu2(H2bbepd)2(bpy)]2·4ClO4 (5), [Cd4(H2bbepd)4(bpy)3(ClO4)2]·6ClO4·(bpy)·2CH3OH·6H2O (6), {[Ni(H2bbepd)(bpy)]·2ClO4·CH3OH}n (7), and {[Ni (H2bbepd)(bpy)]·2NO3·CH3OH·H2O}n (8), respectively. Complex 5 is a binuclear dumbbell-like molecule, complex 6 is a rare example of discrete linear tetranuclear molecule, while complexes 7 and 8 are one-dimensional chains formed by an alternate arrangement of bpy molecules and mononuclear subunits. The differences in complexes 5-8 are largely dependent on the structure of the mononuclear precusors of complexes 1-4. All eight complexes are assembled into higher dimensional supramolecular frameworks by diverse nonconvalent interactions including unusual anion···π interactions between perchlorate and five-membered benzimidazole rings.
    No preview · Article · Feb 2015 · Crystal Growth & Design
  • Mei Pan · Cheng-Yong Su
    [Show abstract] [Hide abstract] ABSTRACT: Review: recent advances in the assembly of coordination supramolecular structures showng Borromean-linking topological character; 46 refs.
    No preview · Article · Feb 2015 · ChemInform
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    [Show abstract] [Hide abstract] ABSTRACT: The development of an effective anode material with hierarchical multi-dimensional architecture is conducive to further improve the cell performance of photovoltaic devices. Herein we introduce an intriguing three-dimensional (3D) hierarchically branched hollow sphere-nanowire hybrid TiO2 photoanode for promising CdS and CdSe quantum dots co-sensitized solar cells application. The demonstrated 3D hierarchically hybrid photoanode owns a considerably high specific surface area while maintaining roomy space and providing ample porosity for efficient electrolyte infiltration. Moreover, the outstanding light scattering ability of such multi-dimensional architecture leads to an enhancement of light utilization efficiency and thus significantly enhanced short-circuit photocurrent. The control over the pore size of TiO2 hollow spheres and the optimizations on the newly developed chemical bath deposited (CBD) cuprous sulfide (Cu2S)/FTO counter electrode eventually yields power conversion efficiency as high as 6.01% for CdS/CdSe based quantum dot-sensitized solar cells (QDSSCs).
    Full-text · Article · Jan 2015 · Nano Energy
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    [Show abstract] [Hide abstract] ABSTRACT: The Front Cover image shows a new and efficient cone-calix[4]arene-based dye (Calix-3) with multiple donor–π–acceptor (D–π–A) moieties used in dye-sensitized solar cells (DSSCs). The conversion efficiency of Calix-3 is above 5 % under standard global 1.5 solar conditions. This compares well with a device using rod-shaped dye M-3 with a single D–π–A chain, which has an efficiency of 3.56 %. The cone-calix[4]arene-based dyes offer higher molar extinction coefficients, longer electron lifetimes, better stability, and stronger binding ability to a TiO2 film. To the best of our knowledge, this is the first example of the use of calixarene-based sensitizer in efficient dye-sensitized solar cells. More details can be found in the Full Paper by Tan and co-workers on page 280 (DOI: 10.1002/cssc.201402401), while more information about the research group is available in the Cover Profile (DOI: 10.1002/cssc.201403048).
    Full-text · Article · Jan 2015 · ChemSusChem

Publication Stats

10k Citations
1,482.53 Total Impact Points

Institutions

  • 2004-2012
    • Sun Yat-Sen University
      • • Department of Chemical Engineering
      • • State Key Laboratory of Optoelectronic Materials and Technologies
      Shengcheng, Guangdong, China
  • 1997-2010
    • Zhongshan University
      中山, Guangdong, China
  • 2008
    • Lanzhou University
      • State Key Laboratory of Applied and Organic Chemistry
      Lanzhou, Gansu Sheng, China
  • 1998-2001
    • The Chinese University of Hong Kong
      • Department of Chemistry
      Hong Kong, Hong Kong