Browsing by Subject "Organic semiconductors"
Now showing items 1-15 of 15
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Dendrimer light-emitting diodes
(University of St Andrews, 2008-11-28) - ThesisThe electronics industry today is one that stands as a multi-billion dollar industry that is increasingly incorporating more and more products that have ever escalating applications in our everyday life. One of the main ... -
Effect of annealing on exciton diffusion in a high performance small molecule organic photovoltaic material
(2017-05-03) - Journal articleSinglet exciton diffusion was studied in the efficient organic photovoltaic electron donor material DTS(FBTTh2)2. Three complementary time-resolved fluorescence measurements were performed: quenching in planar heterojunctions ... -
The effect of intermolecular interactions and disorder on exciton diffusion in organic semiconductors
(University of St Andrews, 2015-06-24) - ThesisThis thesis presents studies of exciton diffusion in organic semiconductors measured using exciton-exciton annihilation and the measurements were performed on materials important for organic solar cells. In the conjugated ... -
First charge-transfer complexes between tetrathiafulvalene and 1,2,5-chalcogenadiazole derivatives : design, synthesis, crystal structures, electronic and electrical properties
(2012-12-31) - Journal articleThe first charge-transfer complexes of tetrathiafulvalene (1) with 1,2,5-chalcogenadiazole derivatives, i.e. with [1,2,5]thiadiazolo[3,4-c][1,2,5]thiadiazole (2) and 3,4-dicyano-1,2,5-telluradiazole (3), were designed, ... -
Fluorescent red-emitting BODIPY oligofluorene star-shaped molecules as a color converter material for visible light communications
(2015-04) - Journal articleStar-shaped organic semiconductors with boron dipyrromethene (BODIPY) cores are color-conversion materials for blue LED-based visible light communications. The difference between 0 and 1 bits is resolved in colour-converted ... -
Low threshold organic semiconductor lasers and their application as explosive sensors
(University of St Andrews, 2012-11-30) - ThesisThis thesis presents studies of organic semiconductor lasers, including their operation when pumped by a light-emitting diode (LED), and their application as explosive sensors. The photophysics and amplified spontaneous ... -
Material and device design for organic photovoltaics
(University of St Andrews, 2015-06-24) - ThesisThis thesis presents novel materials for photovoltaic conversion. The materials described are solution-processable organic semiconductors and have been used in the fabrication of organic photovoltaic cells (OPVs). The ... -
Measurements of exciton diffusion in conjugated polymers
(University of St Andrews, 2009-11-30) - ThesisThe exciton diffusion length, which is the distance an exciton can diffuse in its lifetime, is an important parameter that has a critical impact on the operation of many organic optoelectronic devices, including organic ... -
Microresonators for organic semiconductor and fluidic lasers
(University of St Andrews, 2007-07-16) - ThesisThis thesis describes a number of studies of microstructured optical resonators, designed with the aim of enhancing the performance of organic semiconductor lasers and exploring potential applications. The methodology ... -
One- and two-photon pumped organic semiconductor lasers
(University of St Andrews, 2010) - ThesisThis thesis describes a number of studies on organic semiconductors focused around using them as gain media for lasers. The photophysical properties of organic semiconductors are studied using a wide range of ... -
Organic semiconductor lasers : compact hybrid light sources and development of applications
(University of St Andrews, 2010-06) - ThesisThis thesis describes a number of studies on organic semiconductors as laser gain media with the aim of simplifying the excitation scheme and exploring potential applications. A hybrid device taking the advantage of ... -
Organic solar cells : Novel materials, charge transport and plasmonic studies
(University of St Andrews, 2015-11-30) - ThesisOrganic solar cells have great potential for cost-effective and large area electricity production, but their applicability is limited by the relatively low efficiency. In this dissertation I report investigations of novel ... -
Solution processable diketopyrrolopyrrole (DPP) cored small molecules with BODIPY end groups as novel donors for organic solar cells
(2014-11-18) - Journal articleTwo novel triads based on a diketopyrrolopyrrole (DPP) central core and two 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) units attached by thiophene rings have been synthesised having high molar extinction coefficients. ... -
Ultrafast organic lasers and solid-state amplifiers
(University of St Andrews, 2007-06-19) - ThesisThis thesis presents an investigation of the lasing dynamics and optical amplification devices using conjugated polymers. Spectroscopic studies of conjugated polymers and dendrimers were also performed. Conjugated polymers ... -
Visible light communication using a blue GaN mu LED and fluorescent polymer color converter
(2014-10-15) - Journal articleThis letter presents a novel technique to achieve high-speed visible light communication (VLC) using white light generated by a blue GaN mu LED and a yellow fluorescent copolymer. We generated white light suitable for room ...