2018
DOI: 10.1063/1.5037637
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Can we use time-resolved measurements to get steady-state transport data for halide perovskites?

Abstract: Time-resolved, pulsed excitation methods are widely used to deduce optoelectronic properties of semiconductors, including now also Halide Perovskites (HaPs), especially transport properties. However, as yet no evaluation of their amenability and justification for the use of the results for the above-noted purposes has been reported. To check if we can learn from pulsed measurement results about steadystate phototransport properties, we show here that, although pulsed measurements can be useful to extract infor… Show more

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Cited by 41 publications
(67 citation statements)
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“…The mobilities obtained in our study are consistent with values reported in the literature for MAPbI 3 . [36] The similar values obtained for µ n and µ p with and without extra PbI 2 suggest that no change related to shallow traps is induced by the PbI 2 phase at the grain boundaries or in the bulk. This observation is in general agreement with the slow decrease in mobility with excess PbI 2 suggested by the Hall measurements performed by Wang et al [28] , but in contradiction with the Hall mobility increase measured after a 145°C anneal by Shan et al [23] As MAPbI 3 thin films decompose around 150°C, [37] it is possible that new defects or enhancements in the crystalline quality arise in the film due to the higher temperature treatment, thereby changing the mobility of the layer in the Shan et al study.…”
Section: Pbi 2 Passivationmentioning
confidence: 58%
“…The mobilities obtained in our study are consistent with values reported in the literature for MAPbI 3 . [36] The similar values obtained for µ n and µ p with and without extra PbI 2 suggest that no change related to shallow traps is induced by the PbI 2 phase at the grain boundaries or in the bulk. This observation is in general agreement with the slow decrease in mobility with excess PbI 2 suggested by the Hall measurements performed by Wang et al [28] , but in contradiction with the Hall mobility increase measured after a 145°C anneal by Shan et al [23] As MAPbI 3 thin films decompose around 150°C, [37] it is possible that new defects or enhancements in the crystalline quality arise in the film due to the higher temperature treatment, thereby changing the mobility of the layer in the Shan et al study.…”
Section: Pbi 2 Passivationmentioning
confidence: 58%
“…Equation S3 assumes that no recombination takes place on the response-time of the measurement. At low fluence this is a reasonable assumption, but at high fluence the carrier density could reach a very high number (66). Under these conditions, bimolecular and Auger recombination can reduce the peak value of Δ from what one would expect under ideal conditions (67).…”
Section: Charge Extraction Transient Photocurrent Transient Photovomentioning
confidence: 96%
“…Metal halide perovskites (hereinafter perovskites) in all their forms (nanocrystals, thin films of microcrystals, single crystals) demonstrate a large variety of the photoluminescence (PL) lifetimes. In particular, in case of perovskite thin films and nanocrystals the PL decay times span over more than 3 orders of magnitude, from about one nanosecond to more than several microseconds [1][2][3][4]. Besides, far from always the PL lifetimes correlate with quantum yields (QY), especially in the case of nanocrystals: formally same nanocrystals produced in different laboratories demonstrate orders of magnitude different PL lifetimes with comparable PLQY [5][6][7].…”
Section: Introductionmentioning
confidence: 99%