Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/12510
ชื่อเรื่อง: Calculation and Fabrication of a CH3NH3Pb(SCN)xI3−x Perovskite Film as a Light Absorber in Carbon-based Hole-transport-layer-free Perovskite Solar Cells
ผู้แต่ง: Kumlangwan P.
Suksangrat P.
Towannang M.
Faibut N.
Harnchana V.
Srepusharawoot P.
Chompoosor A.
Kumnorkaew P.
Jarernboon W.
Pimanpang S.
Amornkitbamrung V.
วันที่เผยแพร่: 2020
บทคัดย่อ: CH3NH3Pb(SCN)xI3−x films were prepared using a hot-casting method with five different Pb(SCN)2/PbI2 levels (x = 0, 0.25, 0.5, 1 and 2). Substitution of SCN− in the CH3NH3PbI3 structures induces a film color transformation from black to yellow. UV vis spectra of CH3NH3Pb(SCN)xI3−x films display an increased band gap from 1.59 eV (pure CH3NH3PbI3 film) to 2.37 eV (MAPb(SCN)2I films). Experimental XRD spectra of CH3NH3Pb(SCN)xI3−x films for increasing SCN− levels show a reduced angle of the (110) plane in the same trend as for the simulated tetragonal CH3NH3Pb(SCN)xI3−x structures. The calculated bandgap of simulated tetragonal CH3NH3Pb(SCN)xI3−x structures also increases with the SCN− concentration. Maximal efficiency, 4.56%, was gained from a carbon-based hole-transport layer (HTL)-free CH3NH3PbI3 (x = 0) perovskite solar cell. This is attributed to the low bandgap of CH3NH3PbI3 (1.59 eV). Although, the efficiency of the carbon-based HTL-free CH3NH3Pb(SCN)xI3−x solar cells decreases with increasing SCN− ratio, the excellent solar cell stability was obtained from carbon-based HTL-free CH3NH3Pb(SCN)xI3−x (x = 0.25, 0.5, 1 and 2) solar cells. This should be influenced by the presence of the hydrogen bonds between H and S and/or H and N in the CH3NH3Pb(SCN)xI3−x structures. The carbon-based HTL-free CH3NH3Pb(SCN)0.5I2.5 solar cell delivers a promising efficiency of 3.07%, and its efficiency increases by 11.40% of its initial value after 30-day storage. © 2020, The Korean Physical Society.
URI: https://ir.swu.ac.th/jspui/handle/123456789/12510
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096310998&doi=10.3938%2fjkps.77.1210&partnerID=40&md5=38df294ea6accf85afe025fcb1a61936
ISSN: 3744884
Appears in Collections:Scopus 1983-2021

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