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Tuning the energy l...
Tuning the energy levels of photochromic diarylethene compounds for optoelectronic switch devices
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- Jakobsson, Fredrik L. E., 1974- (författare)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Marsal, Philippe (författare)
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium
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- Braun, Slawomir (författare)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Crispin, Xavier (författare)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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- Cornil, Jérôme (författare)
- Laboratory for Chemistry of Novel Materials, University of Mons-Hainaut, Place du Parc 20, B-7000 Mons, Belgium
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- Fahlman, Mats (författare)
- Linköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan
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- Berggren, Magnus (författare)
- Linköpings universitet,Institutionen för teknik och naturvetenskap,Tekniska högskolan
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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http://urn.kb.se/res...
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Abstract
Ämnesord
Stäng
- Photochromic diarylethene molecules (PC) is investigated for use in opticalwrite/electrical read memory applications. The frontier energy levels and dipolemoment is calculated using density functional theory. Good agreement is foundbetween calculated electronic structure and measured ultraviolet photoelectronspectra. The changes in frontier energy levels and dipole moment are scrutinizedupon two different approaches for chemical modification: (i) adding substituentsto the ethylene bridge; or (ii) changing the chemical nature of the aryl rings.Through the chemical modification the frontier energy levels can be tuned bymore than 2 eV. The calculated molecular properties are used in charge transportmodels to predict the behavior of devices based on these molecules. By using thePC in combination with an organic semiconductor (in bilayer or blend) goodswitching behavior can be achieved in a device. The switch effect is predicted tobe mainly due to switch in frontier energy levels rather than switch of dipolemoment. This is concluded since the dipole moment is either too small (< 5 D) orthe switch effect to small (less than a factor of two).
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Electronics
- Elektronik
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)