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  • Suchan, KlaraLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH (author)

Multi-Stage Phase-Segregation of Mixed Halide Perovskites under Illumination : A Quantitative Comparison of Experimental Observations and Thermodynamic Models

  • Article/chapterEnglish2023

Publisher, publication year, extent ...

  • 2022-11-23
  • Wiley,2023

Numbers

  • LIBRIS-ID:oai:lup.lub.lu.se:c074c5ec-ced8-4b28-b9b5-8738cbfa984b
  • https://lup.lub.lu.se/record/c074c5ec-ced8-4b28-b9b5-8738cbfa984bURI
  • https://doi.org/10.1002/adfm.202206047DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Photo- and charge-carrier-induced ion migration is a major challenge when utilizing metal halide perovskite semiconductors for optoelectronic applications. For mixed iodide/bromide perovskites, the compositional instability due to light- or electrical bias induced phase-segregation restricts the exploitation of the entire bandgap range. Previous experimental and theoretical work suggests that excited states or charge carriers trigger the process, but the exact mechanism is still under debate. To identify the mechanism and cause of light-induced phase-segregation phenomena, the full compositional range of methylammonium lead bromide/iodide samples are investigated, MAPb(BrxI1-x)3 with x = 0…1, by simultaneous in situ X-ray diffraction (XRD) and photoluminescence (PL) spectroscopy during illumination. The quantitative comparison of composition-dependent in situ XRD and PL shows that at excitation densities of 1 sun, only the initial stage of photo-segregation is rationalized with the previously established thermodynamic models. However, a progression of the phase segregation is observed that is rationalized by considering long-lived accumulative photo-induced material alterations. It is suggested that (additional) photo-induced defects, possibly halide vacancies and interstitials, need to be considered to fully rationalize light-induced phase segregation and anticipate the findings to provide crucial insight for the development of more sophisticated models.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Just, JustusLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)ju5031ju (author)
  • Beblo, PascalHelmholtz-Zentrum Berlin für Materialien und Energie GmbH (author)
  • Rehermann, CarolinHumboldt University of Berlin,Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (author)
  • Merdasa, AbomaHelmholtz-Zentrum Berlin für Materialien und Energie GmbH(Swepub:lu)fysi-ams (author)
  • Mainz, RolandHelmholtz-Zentrum Berlin für Materialien und Energie GmbH (author)
  • Scheblykin, Ivan G.Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,LTH profilområde: Avancerade ljuskällor,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,LTH Profile Area: Photon Science and Technology,Faculty of Engineering, LTH(Swepub:lu)chem-isc (author)
  • Unger, EvaLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,Humboldt University of Berlin,Helmholtz-Zentrum Berlin für Materialien und Energie GmbH(Swepub:lu)chem-eun (author)
  • NanoLund: Centre for NanoscienceAnnan verksamhet, LTH (creator_code:org_t)

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  • In:Advanced Functional Materials: Wiley33:31616-301X1616-3028

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