Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/27559
ชื่อเรื่อง: Influence of SCN− moiety on CH3NH3PbI3 perovskite film properties and the performance of carbon-based hole-transport-layer-free perovskite solar cells
ผู้แต่ง: Prasan P.
Aunping N.
Chanlek N.
Kumlangwan P.
Towannang M.
Klangtakai P.
Srepusharawoot P.
Thongnum A.
Kumnorkaew P.
Jarernboon W.
Pimanpang S.
Amornkitbamrung V.
Keywords: Carbon
Crystal structure
Efficiency
Hole mobility
Layered semiconductors
Lead compounds
Molecules
Morphology
Perovskite solar cells
Rietveld refinement
Surface morphology
วันที่เผยแพร่: 2022
บทคัดย่อ: CH3NH3PbI3 perovskite films were prepared via a hot-casting method using six different CH3NH3I, PbI2 and Pb(SCN)2 solutions. Surface morphology of perovskite films with low SCN− dopant levels (0.0625 M and 0.125 M Pb(SCN)2) showed smooth surfaces and large grain sizes. However, with the high SCN− dopant levels (0.1875 M and 0.25 M Pb(SCN)2), rough surfaces were produced with pinholes. The crystal of pure CH3NH3PbI3 (0 M Pb(SCN)2) film is a tetragonal perovskite structure. XRD spectra of all five Pb(SCN)2 added films show the present of CH3NH3PbI3 films and the additional peak at 12.66°. Rietveld refinement analysis reveals that the Pb(SCN)2 addition causes the second phase PbI2 formation along with the tetragonal MAPbI3 perovskite film rather than the CH3NH3Pb(SCN)xI3-x perovskite formation. The carbon-based hole-transport-layer (HTL)-free perovskite (from 0.0625 M Pb(SCN)2 dopant) solar cell is the optimal ratio in generating a promising cell efficiency, 6.34%, with a good efficiency retention of 79.43% after 30 days of testing in comparison to a pure CH3NH3PbI3 (0 M Pb(SCN)2 dopant) perovskite solar cell with an efficiency retention of only 26.92%. The great stability of the Pb(SCN)2 added perovskite solar cells is attributed to the PbI2 layer covered MAPbI3 grains blocking oxygen and/or water molecules from degrading MAPbI3 perovskite. © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
URI: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85122885534&doi=10.1007%2fs10854-021-07687-4&partnerID=40&md5=e1bf54b7847fec3d4d78c47553b9c81e
https://ir.swu.ac.th/jspui/handle/123456789/27559
ISSN: 9574522
Appears in Collections:Scopus 2022

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