%0 Journal Article %1 AK45 %A Glaser, Tobias %A Beck, Sebastian %A Lunkenheimer, Bernd %A Donhauser, Daniela %A Köhn, Andreas %A Kröger, Michael %A Pucci, Annemarie %D 2013 %J Org. Electron. physics, Mater. Appl. %K Infrared_spectroscopy Electrochemical_doping köhn Charge_dissociation theoretische Agglomeration stuttgart Doping_efficiency chemie koehn from:alexanderdenzel Charge_transfer theochem %N 2 %P 575–583 %R 10.1016/j.orgel.2012.11.031 %T Infrared study of the MoO₃ doping efficiency in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) %U http://dx.doi.org/10.1016/j.orgel.2012.11.031 %V 14 %X Electrochemical doping produces clear changes in the vibrational spectra of organic semiconductors as we show here for the system molybdenum oxide (MoO₃) doped into the charge transport material 4,4′-bis(N- carbazolyl)-1,1′-biphenyl (CBP). Based on density-functional theory (DFT) calculations of vibrational spectra, the new spectral features can be attributed to the CBP cation that forms as a result of electron transfer from CBP to MoO₃. The intensity of the new vibrational lines is a direct measure for the probability of charge transfer. MoO₃ agglomerating within the CBP matrix limits the active interface area between the two species. The appearance of a broad electronic transition in the infrared range indicates a new electronic structure at the interface compared to the individual components. The intensity of this electronic excitation serves as a measure for the interface area indicating a linear increase with MoO₃ concentration. Deposition onto cooled substrates results in smaller agglomerates, and thus yields a higher efficiency. © 2012 Elsevier B.V. All rights reserved. %@ 1566-1199

@article{AK45, abstract = {Electrochemical doping produces clear changes in the vibrational spectra of organic semiconductors as we show here for the system molybdenum oxide (MoO₃) doped into the charge transport material 4,4′-bis(N- carbazolyl)-1,1′-biphenyl (CBP). Based on density-functional theory (DFT) calculations of vibrational spectra, the new spectral features can be attributed to the CBP cation that forms as a result of electron transfer from CBP to MoO₃. The intensity of the new vibrational lines is a direct measure for the probability of charge transfer. MoO₃ agglomerating within the CBP matrix limits the active interface area between the two species. The appearance of a broad electronic transition in the infrared range indicates a new electronic structure at the interface compared to the individual components. The intensity of this electronic excitation serves as a measure for the interface area indicating a linear increase with MoO₃ concentration. Deposition onto cooled substrates results in smaller agglomerates, and thus yields a higher efficiency. {\textcopyright} 2012 Elsevier B.V. All rights reserved.}, added-at = {2019-02-06T13:16:25.000+0100}, author = {Glaser, Tobias and Beck, Sebastian and Lunkenheimer, Bernd and Donhauser, Daniela and K{\"{o}}hn, Andreas and Kr{\"{o}}ger, Michael and Pucci, Annemarie}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2dce51ffd84fc7aabd051a4196083dd5e/theochem}, doi = {10.1016/j.orgel.2012.11.031}, interhash = {9bcc24ef6faa154691b50701737af82c}, intrahash = {dce51ffd84fc7aabd051a4196083dd5e}, isbn = {1566-1199}, issn = {15661199}, journal = {Org. Electron. physics, Mater. Appl.}, keywords = {Infrared_spectroscopy Electrochemical_doping köhn Charge_dissociation theoretische Agglomeration stuttgart Doping_efficiency chemie koehn from:alexanderdenzel Charge_transfer theochem}, number = 2, pages = {575–583}, timestamp = {2019-02-06T12:16:25.000+0100}, title = {{Infrared study of the MoO₃ doping efficiency in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP)}}, url = {http://dx.doi.org/10.1016/j.orgel.2012.11.031}, volume = 14, year = 2013 }