Interplay of structural and compositional effects on carrier recombination in mixed-halide perovskites

Eric M. Talbert; Holly F. Zarick; Noah J. Orfield; Wei Li; William R. Erwin; Zachary R. Debra; Kemar R. Reid; Christopher P. McDonald; James R. McBride; Jason Valentine; Sandra J. Rosenthal; Rizia Bardhan

doi:10.1039/c6ra16505b

Interplay of structural and compositional effects on carrier recombination in mixed-halide perovskites

Eric M. Talbert, Holly F. Zarick, Noah J. Orfield, Wei Li, William R. Erwin, Zachary R. Debra, Kemar R. Reid, Christopher P. McDonald, James R. McBride, Jason Valentine, Sandra J. Rosenthal, Rizia Bardhan

Research output: Contribution to journal › Article › Research › peer-review

18 Citations (Scopus)

Abstract

In this work, we investigate the effects of grain structure and bromide content on charge transport in methylammonium lead iodide/bromide (MAPb(I_1-xBr_x)₃) perovskites by examining the steady-state (ss-PL) and time-resolved (tr-PL) photoluminescence of planar films with varying grain size and bromide content. We controlled the perovskite grain structure via solvent engineering with N,N-dimethylformamide (DMF) or dimethyl sulfoxide:γ-butyrolactone (DMSO:GBL), and the resultant grain morphology was independent of Br doping between 0-33%. Carrier lifetimes ranged from 29-52 ns with increasing Br content for DMF-produced perovskite films, and from 2-9 ns for films obtained with DMSO:GBL. Analysis of XRD and photoluminescence data suggests this order-of-magnitude difference in lifetimes is attributable to the nature of iodide-rich recombination nuclei within the bulk perovskite. By modulating the precursor solvent and Br composition, the influence of low-bandgap recombination nuclei can be minimized to enhance charge transport and lengthen the carrier lifetime in mixed-halide perovskite films.

Original language	English
Pages (from-to)	86947-86954
Number of pages	8
Journal	RSC Advances
Volume	6
Issue number	90
DOIs	https://doi.org/10.1039/c6ra16505b
Publication status	Published - 2016
Externally published	Yes

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title = "Interplay of structural and compositional effects on carrier recombination in mixed-halide perovskites",

abstract = "In this work, we investigate the effects of grain structure and bromide content on charge transport in methylammonium lead iodide/bromide (MAPb(I1-xBrx)3) perovskites by examining the steady-state (ss-PL) and time-resolved (tr-PL) photoluminescence of planar films with varying grain size and bromide content. We controlled the perovskite grain structure via solvent engineering with N,N-dimethylformamide (DMF) or dimethyl sulfoxide:γ-butyrolactone (DMSO:GBL), and the resultant grain morphology was independent of Br doping between 0-33%. Carrier lifetimes ranged from 29-52 ns with increasing Br content for DMF-produced perovskite films, and from 2-9 ns for films obtained with DMSO:GBL. Analysis of XRD and photoluminescence data suggests this order-of-magnitude difference in lifetimes is attributable to the nature of iodide-rich recombination nuclei within the bulk perovskite. By modulating the precursor solvent and Br composition, the influence of low-bandgap recombination nuclei can be minimized to enhance charge transport and lengthen the carrier lifetime in mixed-halide perovskite films.",

author = "Talbert, {Eric M.} and Zarick, {Holly F.} and Orfield, {Noah J.} and Wei Li and Erwin, {William R.} and Debra, {Zachary R.} and Reid, {Kemar R.} and McDonald, {Christopher P.} and McBride, {James R.} and Jason Valentine and Rosenthal, {Sandra J.} and Rizia Bardhan",

year = "2016",

doi = "10.1039/c6ra16505b",

language = "English",

volume = "6",

pages = "86947--86954",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry (RSC)",

number = "90",

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T1 - Interplay of structural and compositional effects on carrier recombination in mixed-halide perovskites

AU - Talbert, Eric M.

AU - Zarick, Holly F.

AU - Orfield, Noah J.

AU - Li, Wei

AU - Erwin, William R.

AU - Debra, Zachary R.

AU - Reid, Kemar R.

AU - McDonald, Christopher P.

AU - McBride, James R.

AU - Valentine, Jason

AU - Rosenthal, Sandra J.

AU - Bardhan, Rizia

PY - 2016

Y1 - 2016

N2 - In this work, we investigate the effects of grain structure and bromide content on charge transport in methylammonium lead iodide/bromide (MAPb(I1-xBrx)3) perovskites by examining the steady-state (ss-PL) and time-resolved (tr-PL) photoluminescence of planar films with varying grain size and bromide content. We controlled the perovskite grain structure via solvent engineering with N,N-dimethylformamide (DMF) or dimethyl sulfoxide:γ-butyrolactone (DMSO:GBL), and the resultant grain morphology was independent of Br doping between 0-33%. Carrier lifetimes ranged from 29-52 ns with increasing Br content for DMF-produced perovskite films, and from 2-9 ns for films obtained with DMSO:GBL. Analysis of XRD and photoluminescence data suggests this order-of-magnitude difference in lifetimes is attributable to the nature of iodide-rich recombination nuclei within the bulk perovskite. By modulating the precursor solvent and Br composition, the influence of low-bandgap recombination nuclei can be minimized to enhance charge transport and lengthen the carrier lifetime in mixed-halide perovskite films.

AB - In this work, we investigate the effects of grain structure and bromide content on charge transport in methylammonium lead iodide/bromide (MAPb(I1-xBrx)3) perovskites by examining the steady-state (ss-PL) and time-resolved (tr-PL) photoluminescence of planar films with varying grain size and bromide content. We controlled the perovskite grain structure via solvent engineering with N,N-dimethylformamide (DMF) or dimethyl sulfoxide:γ-butyrolactone (DMSO:GBL), and the resultant grain morphology was independent of Br doping between 0-33%. Carrier lifetimes ranged from 29-52 ns with increasing Br content for DMF-produced perovskite films, and from 2-9 ns for films obtained with DMSO:GBL. Analysis of XRD and photoluminescence data suggests this order-of-magnitude difference in lifetimes is attributable to the nature of iodide-rich recombination nuclei within the bulk perovskite. By modulating the precursor solvent and Br composition, the influence of low-bandgap recombination nuclei can be minimized to enhance charge transport and lengthen the carrier lifetime in mixed-halide perovskite films.

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DO - 10.1039/c6ra16505b

M3 - Article

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SP - 86947

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JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

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Interplay of structural and compositional effects on carrier recombination in mixed-halide perovskites

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