Publications
203 results found
Urbina A, Park JS, Lee JM, et al., 2013, Work function engineering of ZnO electrodes by using p-type and n-type doped carbon nanotubes, NANOTECHNOLOGY, Vol: 24, ISSN: 0957-4484
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- Citations: 10
Wood S, Franklin JB, Stavrinou PN, et al., 2013, Interfacial molecular order of conjugated polymer in P3HT:ZnO bilayer photovoltaics and its impact on device performance, APPLIED PHYSICS LETTERS, Vol: 103, ISSN: 0003-6951
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- Citations: 12
James DT, Frost JM, Wade J, et al., 2013, Controlling Microstructure of Pentacene Derivatives by Solution Processing: Impact of Structural Anisotropy on Optoelectronic Properties, ACS NANO, Vol: 7, Pages: 7983-7991, ISSN: 1936-0851
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- Citations: 84
Wood S, Kim JS, James DT, et al., 2013, Understanding the relationship between molecular order and charge transport properties in conjugated polymer based organic blend photovoltaic devices, JOURNAL OF CHEMICAL PHYSICS, Vol: 139, ISSN: 0021-9606
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- Citations: 24
Li Z, Wong HC, Huang Z, et al., 2013, Performance enhancement of fullerene-based solar cells by light processing, NATURE COMMUNICATIONS, Vol: 4, ISSN: 2041-1723
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- Citations: 109
Lee BR, Lee W, Thanh LN, et al., 2013, Highly Efficient Red-Emitting Hybrid Polymer Light-Emitting Diodes via Forster Resonance Energy Transfer Based on Homogeneous Polymer Blends with the Same Polyfluorene Backbone, ACS APPLIED MATERIALS & INTERFACES, Vol: 5, Pages: 5690-5695, ISSN: 1944-8244
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- Citations: 34
Xia R, Leem D-S, Kirchartz T, et al., 2013, Investigation of a Conjugated Polyelectrolyte Interlayer for Inverted Polymer:Fullerene Solar Cells, ADVANCED ENERGY MATERIALS, Vol: 3, Pages: 718-723, ISSN: 1614-6832
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- Citations: 89
Kim J, Baeg K-J, Khim D, et al., 2013, Optimal Ambipolar Charge Transport of Thienylenevinylene-Based Polymer Semiconductors by Changes in Conformation for High-Performance Organic Thin Film Transistors and Inverters, CHEMISTRY OF MATERIALS, Vol: 25, Pages: 1572-1583, ISSN: 0897-4756
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- Citations: 52
Tsoi WC, Zhang W, Hollis JR, et al., 2013, In-situ monitoring of molecular vibrations of two organic semiconductors in photovoltaic blends and their impact on thin film morphology, Applied Physics Letters, Vol: 102, ISSN: 1077-3118
We report in-situ simultaneous monitoring of molecular vibrations of two components in organic photovoltaic blends using resonant Raman spectroscopy. Blend films were composed of a low bandgap copolymer thieno[3,2-b]thiophene-diketopyrrolopyrrole (DPPTTT) and (6,6)-phenyl-C71-butyric acid ester (PC 70BM). Changes in Raman spectra associated with crystallization processes of each component and their impact on thin film morphology were studied during thermal annealing and cooling processes. Transition temperatures to crystalline phases in blends were measured at ∼150 °C and ∼170 °C for DPPTTT and PC 70BM, respectively. Such phase changes lead to modifications in local chemical composition reducing relative Raman peak intensities (IPC70BM/IDPPTTT) from ∼0.4 in PC 70BM-rich domains to ∼0.15 in homogeneous areas.
Razzell-Hollis J, Tsoi WC, Kim J-S, 2013, Directly probing the molecular order of conjugated polymer in OPV blends induced by different film thicknesses, substrates and additives, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 1, Pages: 6235-6243, ISSN: 2050-7526
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- Citations: 36
Chang H, Suh M, Kim SW, et al., 2012, Highly efficient polymer light-emitting diodes with conjugated polyelectrolyte electron injection layers using combined solution processing techniques, Pages: 1040-1041, ISSN: 1883-2490
Herein, highly efficient PLEDs with CPE EILs were demonstrated by combining two different solution processing techniques. Upon annealing of F8BT active layer, the surface contrast was reduced by 40%. Consequent reduction produces 1.6 times higher luminous efficiency (9.3 Cd/A at 3.6 V) compared to the device without thermal treatment.
Tsoi WC, James DT, Domingo EB, et al., 2012, Effects of a Heavy Atom on Molecular Order and Morphology in Conjugated Polymer:Fullerene Photovoltaic Blend Thin Films and Devices, ACS NANO, Vol: 6, Pages: 9646-9656, ISSN: 1936-0851
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- Citations: 69
Petrozza A, Fazzi D, Avilov I, et al., 2012, Effects of Polymer Packing Structure on Photoinduced Triplet Generation and Dynamics, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 116, Pages: 11298-11305, ISSN: 1932-7447
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- Citations: 8
Kim S, Wang X, Yim JH, et al., 2012, Efficient organic solar cells based on spray-patterned single wall carbon nanotube electrodes, JOURNAL OF PHOTONICS FOR ENERGY, Vol: 2, ISSN: 1947-7988
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- Citations: 9
Park JS, Lee JM, Hwang SK, et al., 2012, A ZnO/N-doped carbon nanotube nanocomposite charge transport layer for high performance optoelectronics, JOURNAL OF MATERIALS CHEMISTRY, Vol: 22, Pages: 12695-12700, ISSN: 0959-9428
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- Citations: 80
Chang H, Suh M, Kim SW, et al., 2012, Highly efficient Polymer Light-Emitting Diodes with Conjugated Polyelectrolyte Electron Injection Layers using Combined Solution Processing Techniques, 19th International Display Workshops / Asia Display 2012 (IDW/AD '12), Publisher: INST IMAGE INFORMATION & TELEVISION ENGINEERS, Pages: 1147-+, ISSN: 1883-2490
Kim JS, Fei Z, James DT, et al., 2012, A comparison between dithienosilole and dithienogermole donor-acceptor type co-polymers for organic bulk heterojunction photovoltaic devices, JOURNAL OF MATERIALS CHEMISTRY, Vol: 22, Pages: 9975-9982, ISSN: 0959-9428
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- Citations: 20
James DT, Kjellander BKC, Smaal WTT, et al., 2011, Thin-Film Morphology of Inkjet-Printed Single-Droplet Organic Transistors Using Polarized Raman Spectroscopy: Effect of Blending TIPS-Pentacene with Insulating Polymer, ACS NANO, Vol: 5, Pages: 9824-9835, ISSN: 1936-0851
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- Citations: 112
Khalil GE, Adawi AM, Robinson B, et al., 2011, Spectroscopy and Single-Molecule Emission of a Fluorene-Terthiophene Oligomer, JOURNAL OF PHYSICAL CHEMISTRY B, Vol: 115, Pages: 12028-12035, ISSN: 1520-6106
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- Citations: 6
Park JS, Lee BR, Jeong E, et al., 2011, High performance polymer light-emitting diodes with N-type metal oxide/conjugated polyelectrolyte hybrid charge transport layers, APPLIED PHYSICS LETTERS, Vol: 99, ISSN: 0003-6951
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- Citations: 35
Coles DM, Michetti P, Clark C, et al., 2011, Vibrationally Assisted Polariton-Relaxation Processes in Strongly Coupled Organic-Semiconductor Microcavities, ADVANCED FUNCTIONAL MATERIALS, Vol: 21, Pages: 3691-3696, ISSN: 1616-301X
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- Citations: 116
Tsoi WC, Nicholson PG, Kim JS, et al., 2011, Surface and subsurface morphology of operating nanowire:fullerene solar cells revealed by photoconductive-AFM, ENERGY & ENVIRONMENTAL SCIENCE, Vol: 4, Pages: 3646-3651, ISSN: 1754-5692
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- Citations: 30
Tsoi WC, James DT, Kim JS, et al., 2011, The Nature of In-Plane Skeleton Raman Modes of P3HT and Their Correlation to the Degree of Molecular Order in P3HT:PCBM Blend Thin Films, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, Vol: 133, Pages: 9834-9843, ISSN: 0002-7863
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- Citations: 317
Tsoi WC, Spencer SJ, Yang L, et al., 2011, Effect of Crystallization on the Electronic Energy Levels and Thin Film Morphology of P3HT:PCBM Blends, MACROMOLECULES, Vol: 44, Pages: 2944-2952, ISSN: 0024-9297
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- Citations: 220
Oberhumer PM, Huang Y-S, Massip S, et al., 2011, Tuning the electronic coupling in a low-bandgap donor-acceptor copolymer via the placement of side-chains, JOURNAL OF CHEMICAL PHYSICS, Vol: 134, ISSN: 0021-9606
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- Citations: 31
Fei Z, Kim JS, Smith J, et al., 2011, A low band gap co-polymer of dithienogermole and 2,1,3-benzothiadiazole by Suzuki polycondensation and its application in transistor and photovoltaic cells, JOURNAL OF MATERIALS CHEMISTRY, Vol: 21, Pages: 16257-16263, ISSN: 0959-9428
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- Citations: 85
Lee D, Lee JH, Kim J-S, et al., 2011, Solution-processible TIPS-Pentacene OTFT With Low Voltage Driving by Self-Assembled Monolayer Gate Dielectric, 18th International Display Workshops (IDW '11), Publisher: INST IMAGE INFORMATION & TELEVISION ENGINEERS, Pages: 891-892, ISSN: 1883-2490
Coles DM, Meijer AJHM, Tsoi WC, et al., 2010, A Characterization of the Raman Modes in a J-Aggregate-Forming Dye: A Comparison between Theory and Experiment, JOURNAL OF PHYSICAL CHEMISTRY A, Vol: 114, Pages: 11920-11927, ISSN: 1089-5639
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- Citations: 26
Chang SS, Tsoi WC, Higgins AM, et al., 2010, Self-Assembled, Molecularly Aligned Conjugated Polymer Nanowires via Dewetting, ADVANCED FUNCTIONAL MATERIALS, Vol: 20, Pages: 3045-3054, ISSN: 1616-301X
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- Citations: 5
Park JS, Lee BR, Lee JM, et al., 2010, Efficient hybrid organic-inorganic light emitting diodes with self-assembled dipole molecule deposited metal oxides, APPLIED PHYSICS LETTERS, Vol: 96, ISSN: 0003-6951
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- Citations: 66
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