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How the Charge-Neutrality Level of Interface States Controls Energy Level Alignment in Cathode Contacts of Organic Bulk-Heterojunction Solar Cells
(American Chemical Society, 2012-04)
Electronic equilibration at the metal–organic interface, leading to equalization of the Fermi levels, is a key process in organic optoelectronic devices. How the energy levels are set across the interface determines carrier ...
Recombination in Organic Bulk Heterojunction Solar Cells: Small Dependence of Interfacial Charge Transfer Kinetics on Fullerene Affinity
(American Chemical Society, 2012)
We investigate the causes for obtaining higher open-circuit voltage in solar cells that use a fullerene with a smaller electron affinity. Using impedance spectroscopy technique, we show that the change of fullerene LUMO ...
Multitap microwave photonic filters with programmable phase response via optical frequency comb shaping
(Optical Society of America, 2012)
We present a programmable multitap microwave photonic filter with an arbitrary phase response operating over a broad bandwidth. Complex coefficient taps are achieved by optical line-by-line pulse shaping on a 10 GHz flat ...
Interfacial engineering of quantum dot-sensitized TiO2 fibrous electrodes for futuristic photoanodes in photovoltaic applications
(Royal Society of Chemistry, 2012)
Herein we report generic surface treatment approaches to improve the electronic interfaces of quantum dot-sensitized TiO2 fiber electrodes, thereby promoting their photoanode performance. Highly dense, continuous and ...
The combination of a polymer–carbon composite electrode with a high-absorptivity ruthenium dye achieves an efficient dye-sensitized solar cell based on a thiolate–disulfide redox couple
(Royal Society of Chemistry, 2012)
To overcome the intrinsic shortcomings of the traditional iodide–triiodide redox couple and
pursue a further performance improvement, intense efforts have been made to exploit alternative
redox shuttles in dye-sensitized ...
Multichannel Radio-Frequency Arbitrary Waveform Generation Based on Multiwavelength Comb Switching and 2-D Line-by-Line Pulse Shaping
(IEEE, 2012-06)
We demonstrate a multichannel time-multiplexed
radio-frequency arbitrary waveform generator. The system combines a switching scheme of multiwavelength optical frequency
combs with a novel 2-D line-by-line pulse shaper ...
Photoanodes Based on Nanostructured WO3 for Water Splitting
(Wiley, 2012-08)
Anodically grown WO3 photoelectrodes prepared in an N-methylformamide (NMF) electrolyte have been investigated with the aim of exploring the effects induced by anodization time and water concentration in the electrochemical ...
Role of Zn0 electron-selective layers in regular and inverted bulk heterojunction solar cells
(American Chemical Society, 2011-02)
Here the role of metal oxide (ZnO) electron-selective layers in the operating mechanisms of bulk-heterojunction polymer−fullerene solar cells is addressed. Inverted as well as regular structures containing ZnO layers at ...
Structural diversity in the self-assembly of pseudopeptidic macrocycles
(Wiley-VCH, 2010)
The self-assembling abilities of several pseudopeptidic macrocycles have been thoroughly studied both in the solid (SEM, TEM, FTIR) and in solution (NMR, UV, CD, FTIR) states. Detailed microscopy revealed large differences ...
Operating modes of sandwiched light-emitting electrochemical cells
(Wiley, 2011-03-14)
Light-emitting electrochemical cells (LECs) are promising lighting devices in which the redistribution of ionic charges allows for double electronic carrier injection from air-stable electrodes. Uncertainties about the ...