Fabrication and characterization of CH 3 NH 3 PbI 3 solar cells with added guanidinium and inserted with decaphenylpentasilane

Abstract In this work we investigated the effects of the addition of guanidinium [C(NH 2 ) 3 ; GA] on CH 3 NH 3 PbI 3 perovskite solar cells fabricated at a high temperature of 190°C in atmospheric air. The addition of GA iodide and the insertion of decaphenylpentasilane between the perovskite and h...

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Published inJapanese Journal of Applied Physics Vol. 61; no. SB; p. SB1024
Main Authors Ono, Iori, Oku, Takeo, Suzuki, Atsushi, Asakawa, Yugo, Terada, Shuhei, Okita, Masanobu, Fukunishi, Sakiko, Tachikawa, Tomoharu
Format Journal Article
LanguageEnglish
Published 01.02.2022
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Summary:Abstract In this work we investigated the effects of the addition of guanidinium [C(NH 2 ) 3 ; GA] on CH 3 NH 3 PbI 3 perovskite solar cells fabricated at a high temperature of 190°C in atmospheric air. The addition of GA iodide and the insertion of decaphenylpentasilane between the perovskite and hole transport layer improved the external quantum efficiency and short-circuit current density, and the conversion efficiencies were stable after 1 month. X-ray diffraction showed that the lattice constant of the perovskite crystals was increased by the addition of GA, and addition of GA also improved the surface morphology. First-principles calculations on the density of states and band structures showed reduction of the total energy by the addition of GA and the effectiveness of the nitrogen atoms in GA.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/ac2661