000262462 001__ 262462
000262462 005__ 20190619220138.0
000262462 022__ $$a1932-7447
000262462 02470 $$a000451933400004$$2isi
000262462 0247_ $$a10.1021/acs.jpcc.8b07069$$2doi
000262462 037__ $$aARTICLE
000262462 245__ $$aAnalysis of Photocarrier Dynamics at Interfaces in Perovskite Solar Cells by Time-Resolved Photoluminescence
000262462 260__ $$c2018$$aWashington$$bAMER CHEMICAL SOC
000262462 269__ $$a2018-11-29
000262462 336__ $$aJournal Articles
000262462 520__ $$aThe power conversion efficiency of perovskite solar cells is drastically affected by photocarrier dynamics at the interfaces. Experimental measurements show quenching of the photoluminescence (PL) signal from the perovskite layer when it is capped with a hole transport medium (HTM). Furthermore, time-resolved PL (TRPL) data show a faster decay of the PL signal in the presence of the perovskite/HTM interface. The experimental decay is usually fitted using one or two exponential functions with an incomplete physical picture. In this work, an extensive model is used to extract the key physical parameters characterizing carrier dynamics in the bulk and at the interfaces. The decay of the TRPL signal is calculated in the presence of both defect-assisted recombination (Shockley Read Hall) and band-to-band radiative recombination where carrier extraction/recombination at the interfaces is described by interface recombination velocities. By proper curve fitting of the modeling results and the measured TRPL signal, meaningful optoelectronic parameters governing photophysical processes in mixed halide perovskite thin films and single crystals are extracted. Furthermore, a sensitivity analysis to assess the contribution of these parameters on TRPL kinetics is also performed. Notably, the inclusion of the diffusion and surface recombination velocity at the interfaces allows to obtain the important physical parameters that govern the TRPL kinetics and improve the conformity of fits to experiments.
000262462 650__ $$aChemistry, Physical
000262462 650__ $$aNanoscience & Nanotechnology
000262462 650__ $$aMaterials Science, Multidisciplinary
000262462 650__ $$aChemistry
000262462 650__ $$aScience & Technology - Other Topics
000262462 650__ $$aMaterials Science
000262462 6531_ $$aorganolead halide perovskite
000262462 6531_ $$acharge-carrier mobilities
000262462 6531_ $$aopen-circuit voltage
000262462 6531_ $$arecombination
000262462 6531_ $$adiffusion
000262462 6531_ $$aelectron
000262462 6531_ $$atemperature
000262462 6531_ $$alifetimes
000262462 6531_ $$amechanism
000262462 700__ $$aBaloch, Ahmer A. B.
000262462 700__ $$aAlharbi, Fahhad H.
000262462 700__ $$g263917$$0249373$$aGrancini, Giulia
000262462 700__ $$aHossain, Mohammad I.
000262462 700__ $$0240422$$aNazeeruddin, Md. K.$$g105958
000262462 700__ $$aTabet, Nouar
000262462 773__ $$k47$$j122$$q26805-26815$$tJournal Of Physical Chemistry C
000262462 8560_ $$fmdkhaja.nazeeruddin@epfl.ch
000262462 909C0 $$yApproved$$pGMF$$xU12965$$mmdkhaja.nazeeruddin@epfl.ch$$zBorel, Alain$$0252519
000262462 909CO $$particle$$ooai:infoscience.epfl.ch:262462$$pSB
000262462 961__ $$afantin.reichler@epfl.ch
000262462 973__ $$aEPFL$$sPUBLISHED$$rREVIEWED
000262462 980__ $$aARTICLE
000262462 980__ $$aWoS
000262462 981__ $$aoverwrite