000065309 001__ 65309
000065309 005__ 20180216130847.0
000065309 0247_ $$2doi$$a10.1021/acs.jpcc.5b06211
000065309 0248_ $$2sideral$$a92344
000065309 037__ $$aART-2015-92344
000065309 041__ $$aeng
000065309 100__ $$aYangui, A.
000065309 245__ $$aOptical investigation of broadband white-light emission in self-assembled organic-inorganic Perovskite (c6h11nh3)2pbbr4
000065309 260__ $$c2015
000065309 5060_ $$aAccess copy available to the general public$$fUnrestricted
000065309 5203_ $$aThe performance of hybrid organic perovskite (HOP) for solar energy conversion is driving a renewed interest in their light emitting properties. The recent observation of broad visible emission in layered HOP highlights their potential as white-light emitters. Improvement of the efficiency of the material requires a better understanding of its photophysical properties. We present in-depth experimental investigations of white-light (WL) emission in thin films of the (C6H11NH3)2PbBr4. The broadband, strongly Stokes shifted emission presents a maximum at 90 K when excited at 3.815 eV, and below this temperature coexists with an excitonic edge emission. X-rays and calorimetry measurements exclude the existence of a phase transition as an origin of the thermal behavior of the WL luminescence. The free excitonic emission quenches at low temperature, despite a binding energy estimated to 280 meV. Time-resolved photoluminescence spectroscopy reveals the multicomponent nature of the broad emission. We analyzed the dependence of these components as a function of temperature and excitation energy. The results are consistent with the existence of self-trapped states. The quenching of the free exciton and the thermal evolution of the WL luminescence decay time are explained by the existence of an energy barrier against self-trapping, estimated to -10 meV.
000065309 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/MAT2013-44063-R
000065309 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000065309 590__ $$a4.509$$b2015
000065309 591__ $$aCHEMISTRY, PHYSICAL$$b30 / 144 = 0.208$$c2015$$dQ1$$eT1
000065309 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b39 / 270 = 0.144$$c2015$$dQ1$$eT1
000065309 591__ $$aNANOSCIENCE & NANOTECHNOLOGY$$b22 / 82 = 0.268$$c2015$$dQ2$$eT1
000065309 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000065309 700__ $$aGarrot, D.
000065309 700__ $$aLauret, J. S.
000065309 700__ $$aLusson, A.
000065309 700__ $$aBouchez, G.
000065309 700__ $$aDeleporte, E.
000065309 700__ $$aPillet, S.
000065309 700__ $$aBendeif, E. E.
000065309 700__ $$0(orcid)0000-0002-9687-4903$$aCastro, M.$$uUniversidad de Zaragoza
000065309 700__ $$aTriki, S.
000065309 700__ $$aAbid, Y.
000065309 700__ $$aBoukheddaden, K.
000065309 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDepartamento de Ciencia y Tecnología de Materiales y Fluidos$$cCiencia de los Materiales e Ingeniería Metalúrgica
000065309 773__ $$g119, 41 (2015), 23638-23647$$pJ. phys. chem., C$$tJournal of Physical Chemistry C$$x1932-7447
000065309 8564_ $$s1752187$$uhttps://zaguan.unizar.es/record/65309/files/texto_completo.pdf$$yPostprint
000065309 8564_ $$s83959$$uhttps://zaguan.unizar.es/record/65309/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000065309 909CO $$ooai:zaguan.unizar.es:65309$$particulos$$pdriver
000065309 951__ $$a2018-02-15-14:45:43
000065309 980__ $$aARTICLE