000159245 001__ 159245
000159245 005__ 20190316234950.0
000159245 0247_ $$2doi$$a10.1016/j.physb.2009.07.063
000159245 02470 $$2ISI$$a000271357300065
000159245 037__ $$aARTICLE
000159245 245__ $$aPhotoexcited carrier relaxation dynamics in pentacene probed by ultrafast optical spectroscopy: Influence of morphology on relaxation processes
000159245 269__ $$a2009
000159245 260__ $$c2009
000159245 336__ $$aJournal Articles
000159245 520__ $$aWe present a comparative study of ultrafast photoexcited state relaxation in pentacene single crystals and in pure and C-60-doped pentacene films using optical pump-probe spectroscopy. The photoinduced absorption spectra in pentacene crystals is consistent with a dominant singlet-triplet fission decay channel for above-gap excitation. This decay channel is suppressed in thin films and even further suppressed by electron trapping in C60-doped films. Thus we show that suppression of triplet state production, which is necessary for free carrier formation and thus photovoltaic and photodiode performance, is controllable via sample morphology. (C) 2009 Elsevier B.V. All rights reserved.
000159245 6531_ $$aUltrafast spectroscopy
000159245 6531_ $$aOrganic semiconductors
000159245 6531_ $$aSample morphology
000159245 6531_ $$aExciton Dynamics
000159245 6531_ $$aCharge-Transfer
000159245 6531_ $$aLow-Cost
000159245 6531_ $$aPolymers
000159245 6531_ $$aFilms
000159245 6531_ $$aCells
000159245 700__ $$aThorsmolle, V. K.
000159245 700__ $$aAveritt, R. D.
000159245 700__ $$aDemsar, J.
000159245 700__ $$aSmith, D. L.
000159245 700__ $$aTretiak, S.
000159245 700__ $$aMartin, R. L.
000159245 700__ $$aChi, X.
000159245 700__ $$aCrone, B. K.
000159245 700__ $$aRamirez, A. P.
000159245 700__ $$aTaylor, A. J.
000159245 773__ $$j404$$q3127-3130$$tPhysica B-Condensed Matter
000159245 8564_ $$s309349$$uhttps://infoscience.epfl.ch/record/159245/files/PhysicaB404.pdf$$yPublisher's version$$zPublisher's version
000159245 909C0 $$0252307$$pGR-MO$$xU11269
000159245 909CO $$ooai:infoscience.tind.io:159245$$pSB$$particle$$qGLOBAL_SET
000159245 917Z8 $$xWOS-2010-11-30
000159245 917Z8 $$x105914
000159245 937__ $$aEPFL-ARTICLE-159245
000159245 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000159245 980__ $$aARTICLE