1 Ocak 2019 Dergi makalesi Açık Erişim

Rut, Fabian; Aygueler, Lieitem F.; Giesbrecht, Nadja; Rendenbach, Bettina; Magin, Alice; Docampo, Pablo; Kait, Heinz; Hetterich, Michael

MARC21 XML

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="http://www.loc.gov/MARC21/slim">
  <leader>00000nam##2200000uu#4500</leader>
  <datafield tag="909" ind1="C" ind2="O">
    <subfield code="p">user-tubitak-destekli-proje-yayinlari</subfield>
    <subfield code="o">oai:zenodo.org:74299</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">Multiple-cation mixed-halide (Cs,FA,MA)Pb(I,Br)(3) perovskites containing cesium, formarnidinium (FA), and methylammonium (MA) possess excellent properties for a wide range of optoelectronic applications such as thin-film pliotovoltaics or lasers. We investigate the role of excitons and the excitor) binding energy E-B, relevant for the effectiveness of charge separation in solar cells, as well as the temperature dependent bandgap energy E-g which is used as an indicator for crystal phase transitions. Generalized Elliott fits of absorption spectra offer the possibility to determine both E-B and E-g. However, since excitonic effects are non-negligibk even at room temperature, a careful and detailed analysis of the spectra is crucial for a correct interpretation. Therefore, an additional evaluation based on a so-called f-sum rule is applied to achieve an improved reliability of the results at higher temperatures. The obtained EB values of 20-24 meV for Cs-contailaing mixed perovskite compounds are below the ones of 24-32 meV and 36-41 meV for pure methylammonium lead iodide (MAPbI(3)) and bromide (MAPbBr(3)), respectively, and, thus, facilitate charge-carner separation in photovoltaic applications. Furthermore, temperature-dependerit (T = 5-300 K) studies of E-g in (Cs,FA,MA)Pb(I,BrP)(3) indicate a suppressed crystal phase transition by the absence of any phase-transition related signatures such as the well-Imown jump of about 100 meV in MAPbI(3). We verify these results using temperature-dependent electroreflectance spectroscopy, which is a very reliable technique for the direct and non-destructive determination of optical resonances of the absorber layer in complete solar cells. Additionally, we confirm the suppression i of the phase transition in Cs-0.05(FA(0.83)MA(0.17))(0.95)Pb(I0.83Br0.17)(3) by ternperature-deperiderit X-ray diffraction. (C) 2019 Author(s).</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">publication</subfield>
    <subfield code="b">article</subfield>
  </datafield>
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="a">Creative Commons Attribution</subfield>
    <subfield code="u">http://www.opendefinition.org/licenses/cc-by</subfield>
  </datafield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">Rut, Fabian</subfield>
    <subfield code="u">KIT, Inst Appl Phys, D-76131 Karlsruhe, Germany</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="z">md5:8baa105333c43d3beed85e6009cc6350</subfield>
    <subfield code="s">260</subfield>
    <subfield code="u">https://aperta.ulakbim.gov.trrecord/74299/files/bib-78618365-6581-4977-9844-a75a6e6022d9.txt</subfield>
  </datafield>
  <controlfield tag="005">20210316040945.0</controlfield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2019-01-01</subfield>
  </datafield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.1063/1.5083792</subfield>
    <subfield code="2">doi</subfield>
  </datafield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  </datafield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Temperature-dependent studies of excitors binding energy and phase-transition suppress on in (Cs,FA,MA)Pb(I,Br)(3) perovskites</subfield>
  </datafield>
  <datafield tag="909" ind1="C" ind2="4">
    <subfield code="v">7</subfield>
    <subfield code="p">APL MATERIALS</subfield>
    <subfield code="n">3</subfield>
  </datafield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2">opendefinition.org</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Aygueler, Lieitem F.</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Giesbrecht, Nadja</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Rendenbach, Bettina</subfield>
    <subfield code="u">Ludwig Maximilians Univ Munchen, Dept Chem, D-81377 Munich, Germany</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Magin, Alice</subfield>
    <subfield code="u">KIT, Inst Appl Phys, D-76131 Karlsruhe, Germany</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Docampo, Pablo</subfield>
    <subfield code="u">Newcastle Univ, Sch Elect &amp; Elect Engn, Dept Phys, Newcastle Upon Tyne NE1 7RU, Tyne &amp; Wear, England</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Kait, Heinz</subfield>
    <subfield code="u">KIT, Inst Appl Phys, D-76131 Karlsruhe, Germany</subfield>
  </datafield>
  <datafield tag="700" ind1=" " ind2=" ">
    <subfield code="a">Hetterich, Michael</subfield>
  </datafield>
  <controlfield tag="001">74299</controlfield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-tubitak-destekli-proje-yayinlari</subfield>
  </datafield>
</record>