000197153 001__ 197153
000197153 005__ 20190316235845.0
000197153 0247_ $$2doi$$a10.1038/nphoton.2013.374
000197153 022__ $$a1749-4893
000197153 02470 $$2ISI$$a000332221100018
000197153 037__ $$aARTICLE
000197153 245__ $$aUnravelling the mechanism of photoinduced charge transfer processes in lead iodide perovskite solar cells
000197153 269__ $$a2014
000197153 260__ $$bNature Publishing Group$$c2014$$aLondon
000197153 300__ $$a6
000197153 336__ $$aJournal Articles
000197153 520__ $$aLead halide perovskites have recently been used as light absorbers in hybrid organic–inorganic solid-state solar cells, with efficiencies as high as 15% and open-circuit voltages of 1 V. However, a detailed explanation of the mechanisms of operation within this photovoltaic system is still lacking. Here, we investigate the photoinduced charge transfer processes at the surface of the perovskite using time-resolved techniques. Transient laser spectroscopy and microwave photoconductivity measurements were applied to TiO2 and Al2O3 mesoporous films impregnated with CH3NH3PbI3 perovskite and the organic hole-transporting material spiro-OMeTAD. We show that primary charge separation occurs at both junctions, with TiO2 and the hole-transporting material, simultaneously, with ultrafast electron and hole injection taking place from the photoexcited perovskite over similar timescales. Charge recombination is shown to be significantly slower on TiO2 than on Al2O3 films.
000197153 6531_ $$aHybrid organic-inorganic photovoltaics
000197153 6531_ $$aLead halide perovskite
000197153 6531_ $$aInterfacial electron transfer processes
000197153 6531_ $$aCarrier dynamics
000197153 6531_ $$aSpiro-MeOTAD
000197153 700__ $$0242521$$g166646$$aMarchioro, Arianna
000197153 700__ $$0240324$$g126491$$aTeuscher, Joël
000197153 700__ $$aFriedrich, Dennis
000197153 700__ $$aKunst, Marinus
000197153 700__ $$aVan De Krol, Roel
000197153 700__ $$0244223$$g196687$$aMoehl, Thomas
000197153 700__ $$aGrätzel, Michael$$0240191$$g105292
000197153 700__ $$0240325$$g105914$$aMoser, Jacques-E.
000197153 773__ $$j8$$tNature Photonics$$k3$$q250-255
000197153 8564_ $$uhttps://infoscience.epfl.ch/record/197153/files/nphoton2013.pdf$$zn/a$$s1390423$$yn/a
000197153 909C0 $$xU11269$$0252307$$pGR-MO
000197153 909C0 $$pLPI$$xU10101$$0252060
000197153 909CO $$qGLOBAL_SET$$pSB$$particle$$ooai:infoscience.tind.io:197153
000197153 917Z8 $$x105914
000197153 937__ $$aEPFL-ARTICLE-197153
000197153 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000197153 980__ $$aARTICLE