Articles - Science and Technology
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Organic thin-film phototransistors based on poly(3-hexylthiophene)
(2009)We investigated visible and UV light response of OTFTs based on the solution processable poly(3-hexylthiophene) (P3HT) semiconducting polymer. The transistors show a photoresponse in channel current under white and UV light ... -
Thermal tunability of monolithic polymer microcavities
(2008)We demonstrate the thermal tunability of the emission of polymer embedded in microcavities. The large thermo-optic coefficients of a conjugated polymer is combined with the possibility to tailor the emission properties by ... -
Pauli blockade of the electron spin flip in bulk GaAs
(AMERICAN PHYSICAL SOC, 2007)By means of time-resolved optical orientation under strong optical pumping, the k dependence of the electron spin-flip time (tau(sf)) in undoped GaAs is experimentally determined. tau(sf) monotonically decreases by more ... -
Luminescence based series resistance mapping of III-V multijunction solar cells
(2013)A method to measure the series resistance of GaIn P/Ga(In)As/Ge triple-junction solar cells spatially resolved is developed, based on luminescence imaging. With the help of network simulations, the dependence of the local ... -
High-yield transfer printing of metal-insulator-metal nanodiodes
(2012)Nanoscale metal-insulator-metal (MIM) diodes represent important devices in the fields of electronic circuits, detectors, communication, and energy, as their cutoff frequencies may extend into the "gap" between the electronic ... -
High compositional homogeneity in In-rich InGaAs nanowire arrays on nanoimprinted SiO 2/Si (111)
(2012)We report improved homogeneity control of composition-tuned In Ga As (x 0.4) nanowire (NW) arrays grown by catalyst-free molecular beam epitaxy (MBE) on nanoimprinted SiO /Si (111) substrates. Using very high As/(GaIn) ... -
Fully spray coated organic photodiodes
(2009)Solution-processed organic diodes based on bulk heterojunctlons are attractive for large area photodetectlon. We report a general approach for fully spray-coated organic photodiodes with outstanding characteristics In ... -
Active pixel concept combined with organic photodiode for imaging devices
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007)The active pixel concept is a promising architecture for imaging systems. We report on the electrooptical characterization of a hybrid organic active pixel sensor (APS) where an organic photodiode is integrated on top of ... -
Organic field-effect transistors for biosensing applications
(2009)Organic field-effect transistors (OFETs) with regioregular poly(3-hexylthiophene) (P3HT) have been designed and fabricated aiming at the lowest possible working point (i.e. the adjusted values of gate voltage and drain-source ... -
Fabrication of hierarchically structured titania thin films via combining nano-imprint lithography with block copolymer assisted sol-gel templating
(ROYAL SOC CHEMISTRY, 2013)Combination of nano-imprint lithography with block copolymer assisted sol-gel chemistry is used to fabricate large area mesoporous titania films with additional superstructure in the sub-micrometer range. The final film ... -
A magnetic manipulation system using an active filter for electronic detection of target cells
(2012)Important advances in the development of magnetic manipulation devices have been recorded over the last few years and promising experimental results have been presented. In this article we first perform a detailed analysis ... -
Ultra-thin titanium oxide
(2012)We demonstrate the fabrication of ultra-thin titanium oxide films by plasma-induced surface oxidation. Ellipsometry measurements indicate an oxide thickness of about 2 nm. Electrical characterization was performed on ... -
Large active area organic photodiodes for short-pulse X-ray detection
(2013)Organic thin film light sensors are promising devices for X-ray imaging systems. Compared to crystalline silicon photodiodes (c-Si), organic sensors can be fabricated on large active area at low cost. Furthermore, organic ... -
First-principles study of a novel molecular rectifier
(2013)Designing molecular structures to meet certain behavior has become an important step in the field of molecular electronics. Interestingly, linker groups between molecules and electrodes show a critical role in the ... -
Tunable thermoresponsive TiO2/SiO2 Bragg stacks based on sol-gel fabrication methods
(2013)Thermoresponsive TiO2/SiO2 one-dimensional photonic crystals (Bragg stacks) fabricated via sol-gel processing methods represent a promising class of environmentally responsive nanostructures featuring optically encoded ... -
A hybrid CMOS-imager with a solution-processable polymer as photoactive layer
(2012)The solution-processability of organic photodetectors allows a straightforward combination with other materials, including inorganic ones, without increasing cost and process complexity significantly compared with conventional ... -
MC simulation of double-resonant-phonon depopulation THz QCLs for high operating temperatures
(2008)We theoretically investigate the temperature performance of GaAs-based double-resonant-phonon depopulation THz quantum cascade lasers. Based on an ensemble Monte Carlo simulation including both carrier-phonon and carrier-carrier ...
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