ORCID Profile
0000-0001-9390-8074
Current Organisations
Uniwersytet Ekonomiczny w Poznaniu
,
Nanyang Technological University
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Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2PY20942J
Publisher: IGI Global
Date: 2020
DOI: 10.4018/978-1-5225-5294-9.CH002
Abstract: The implementation of virtual and augmented reality environments on the web requires integration between 3D technologies and web technologies, which are increasingly focused on collaboration, annotation, and semantics. Thus, combining VR and AR with the semantics arises as a significant trend in the development of the web. The use of the Semantic Web may improve creation, representation, indexing, searching, and processing of 3D web content by linking the content with formal and expressive descriptions of its meaning. Although several semantic approaches have been developed for 3D content, they are not explicitly linked to the available well-established 3D technologies, cover a limited set of 3D components and properties, and do not combine domain-specific and 3D-specific semantics. In this chapter, the authors present the background, concepts, and development of the Semantic Web3D approach. It enables ontology-based representation of 3D content and introduces a novel framework to provide 3D structures in an RDF semantic-friendly format.
Publisher: American Chemical Society (ACS)
Date: 15-03-2019
Publisher: American Chemical Society (ACS)
Date: 07-09-2017
Publisher: American Chemical Society (ACS)
Date: 25-08-2010
DOI: 10.1021/NN1015874
Abstract: The chemically reduced graphene oxide (rGO) was transferred onto polyethylene terephthalate (PET) substrates and then used as transparent and conductive electrodes for flexible organic photovoltaic (OPV) devices. The performance of the OPV devices mainly depends on the charge transport efficiency through rGO electrodes when the optical transmittance of rGO is above 65%. However, if the transmittance of rGO is less than 65%, the performance of the OPV device is dominated by the light transmission efficiency, that is, the transparency of rGO films. After the tensile strain (∼2.9%) was applied on the fabricated OPV device, it can sustain a thousand cycles of bending. Our work demonstrates the highly flexible property of rGO films, which provide the potential applications in flexible optoelectronics.
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3RA47377E
Abstract: Novel 2-D supramolecular networks were made by metal-ion coordination, and their properties compared with similar 3-D networks.
Publisher: American Chemical Society (ACS)
Date: 03-08-2011
DOI: 10.1021/OL201829S
Abstract: The synthesis and characterization is reported of low bandgap [1,2,5]chalcogenazolo[3,4-f]benzo[1,2,3]triazole and [1,2,3]triazolo[3,4-g]quinoxaline derivatives that display higher solubility and stability then their thiadiazole counterparts, [1,2,5]chalcogenazolo[3,4-f]benzo[2,1,3]thiadiazole and [1,2,5]thiadiazolo[3,4-g]quinoxaline, respectively.
Publisher: American Chemical Society (ACS)
Date: 25-11-2013
DOI: 10.1021/AM4042614
Abstract: Small-molecule solar-cell performance is highly sensitive to the crystallinity and intermolecular connectivity of the molecules. In order to enhance the crystallinity for the solution-processed small molecule, it is possible to make use of carboxylic acid end-functional groups to drive hydrogen-bonding-induced π-π stacking of conjugated molecules. Herein, we report the synthesis and characterization of quarterthiophenes with carboxylic acid as end groups. The formation of hydrogen bonds between neighboring acid groups gives rise to a pseudo-polymeric structure in the molecules, which leads to substantial improvement in the organization and crystallinity of the active layers. This resulted in a four-fold increase in the hole mobility and a two-fold improvement in the performance of the solar cell device for the acid-functionalized molecule, compared to its ester analogue. More importantly, optimal device performance for the acid-functionalized molecule was achieved for the as-cast film, thereby reducing the reliance on thermal annealing and solvent additives.
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM16349G
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA01248H
Abstract: A remarkably high V oc of 1.1 V has been obtained in a solar cell from a donor–acceptor polymer based upon a benzo[ c ][2,1,3]thiadiazole-5,6-dicarboxylic imide acceptor unit.
Publisher: Wiley
Date: 19-07-2017
Publisher: Walter de Gruyter GmbH
Date: 02-2010
DOI: 10.3139/146.110260
Abstract: Printing technology offers the potential for the rapid and inexpensive, large scale manufacture of electronic devices, especially organic and hybrid organic/inorganic devices. A variety of printing techniques, including gravure, flexography and ink-jet printing have been utilized for the fabrication of electronic devices. An overview is given of the types of printing used, the advantages of each technique, the materials requirements for successful printing, and the types of materials, including organic polymers and inorganic nanoparticles, that can be printed. Ex les are given of how printing can be used to successfully print the active and inactive layers, including electrodes and dielectrics, of devices such as LEDs, solar cells and transistors, and the relative performance of devices made by different techniques is compared. The limitations and advantages of current technologies are discussed.
Publisher: American Chemical Society (ACS)
Date: 07-04-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA01340D
Abstract: The presence of small water-soluble additives makes it possible to tune the surfactant gel-to-liquid crystalline (L β –L α ) phase transition temperature ( T m ) for a bilayer-forming cationic surfactant system and its phase behavior on dilution.
Publisher: Wiley
Date: 07-07-2022
DOI: 10.1002/INF2.12345
Abstract: The versatile nature of organic conjugated materials renders their flawless integration into a erse family of optoelectronic devices with light‐harvesting, photodetection, or light‐emitting capabilities. Classes of materials that offer the possibilities of two or more distinct optoelectronic functions are particularly attractive as they enable smart applications while providing the benefits of the ease of fabrication using low‐cost processes. Here, we develop a novel, multi‐purpose conjugated small molecule by combining boron‐azadipyrromethene (aza‐BODIPY) as electron acceptor with triphenylamine (TPA) as end‐capping donor units. The implemented donor–acceptor–donor (D–A–D) configuration, in the form of TPA‐azaBODIPY‐TPA, preserves ideal charge transfer characteristics with appropriate excitation energy levels, with the additional ability to be used as either a charge transporting interlayer or light‐sensing semiconducting layer in optoelectronic devices. To demonstrate its versatility, we first show that TPA‐azaBODIPY‐TPA can act as an excellent hole transport layer in methylammonium lead triiodide (MAPbI 3 )‐based perovskite solar cells with measured power conversion efficiencies exceeding 17%, outperforming control solar cells with PEDOT:PSS by nearly 60%. Furthermore, the optical bandgap of 1.49 eV is shown to provide significant photodetection in the wavelength range of up to 800 nm where TPA‐azaBODIPY‐TPA functions as donor in near‐infrared organic photodetectors (OPDs) composed of fullerene derivatives. Overall, the established versatility of TPA‐azaBODIPY‐TPA, combined with its robust thermal stability as well as excellent solubility and processability, provides a new guide for developing highly efficient multi‐purpose electronic materials for the next‐generation of smart optoelectronic devices. image
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TC00212D
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA90142D
Publisher: Elsevier BV
Date: 09-2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM33317A
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM12347E
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TC01956H
Abstract: A series of strong electron-rich small molecules based on acenes were designed and synthesized for application in green/blue organic light-emitting diodes and perovskite solar cells.
Publisher: American Chemical Society (ACS)
Date: 30-11-2010
DOI: 10.1021/OL102465A
Abstract: The reduction of a dithienylbenzobisthiadiazole derivative TBBT can be performed selectively so as to afford either [1,2,5]-thiadiazolo[3,4-g]quinoxaline (TQ) or pyrazino[2,3-g]quinoxaline (PQ) derivatives. This approach offers a much milder, shorter, and more efficient route to PQ and TQ derivatives than current methods. It is further shown how the optical and electrochemical properties of PQ and TQ can be tuned by choice of appropriate substituents.
Publisher: American Chemical Society (ACS)
Date: 18-07-2023
Publisher: Elsevier BV
Date: 07-2014
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CP22817J
Abstract: A solution processed method for fabricating transition metal sulfides on fluorine doped tin oxide (FTO) as efficient counter electrodes in iodine/iodide based solar cells has been demonstrated. Conversion efficiencies of 7.01% and 6.50% were obtained for nickel and cobalt sulfides, respectively, comparable to the conventional thermally platinised FTO electrodes (7.32%). A comparable charge transfer resistance of Ni(3)S(2) and Co(8.4)S(8) to conventional Pt was found to be a key factor for such high efficiencies. Cyclic voltammetry, Kelvin probe microscopy, Electrochemical Impedance Spectroscopy, and Tafel polarization were performed to study the underlying reasons behind such efficient counter electrode performance.
Publisher: Wiley
Date: 28-07-2011
DOI: 10.1002/POLA.24879
Publisher: Wiley
Date: 14-10-2011
DOI: 10.1002/POLA.25021
Publisher: American Chemical Society (ACS)
Date: 11-03-2011
DOI: 10.1021/AM101202K
Abstract: In this study, we use solution-processable crystalline TiO(2) nanoparticles as a buffer layer between the active layer and aluminum cathode to fabricate the P3HT:PCBM-based bulk heterojunction (BHJ) organic photovoltaic (OPV) devices. The employment of the presynthesized TiO(2) nanoparticles simplifies the fabrication of OPV devices because of the elimination of an additional hydrolysis step of precursors in air. The fabricated OPV devices with the thermally stable TiO(2) buffer layer are subjected to the further postdeposition thermal annealing, resulting in a power conversion efficiency (PCE) as high as 3.94%. The improved device performance could be attributed to the electron transporting and hole blocking capabilities due to the introduced TiO(2) buffer layer.
Publisher: American Chemical Society (ACS)
Date: 08-07-2010
DOI: 10.1021/OL100989V
Abstract: A one-step synthesis of 4,8-dibromobenzo[1,2-c ,5-c']bis[1,2,5]thiadiazole with use of 1,2,4,5-tetraaminobenzene tetrahydrobromide and thionyl bromide in good yield is reported. This unit can then be used in the synthesis of low bandgap materials via palladium-catalyzed coupling reactions. The approach offers a quick and easy way to prepare low bandgap materials as compared to the current literature methods.
Publisher: Wiley
Date: 12-2022
DOI: 10.1002/INF2.12395
Abstract: This cover (DOI: 10.1002/inf2.12345 ) shows a multifunctional TPA‐azaBODIPY‐TPA small molecule with superior optoelectronic and photophysical properties. Material is shown to function as an efficient hole transport layer in perovskite solar cells reaching a power conversion efficiency of 17.4%, and as a robust electron donor in near‐infrared organic photodetectors absorbing light in the wavelength range of up to 800 nm. Offering two distinct optoelectronic functions, TPA‐azaBODIPY‐TPA is particularly attractive as it enables multi‐purpose applications while maintaining the ease of fabrication. image
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Yeng Ming Lam.