Effects of annealing temperature on decaphenylcyclopentasilane-inserted CH3NH3PbI3 perovskite solar cells

• Published in: Chemical physics letters Vol. 737; p. 136822
• Main Authors: Taguchi, Masaya, Suzuki, Atsushi, Oku, Takeo, Ueoka, Naoki, Minami, Satoshi, Okita, Masanobu
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 16.12.2019
• Subjects: Perovskite solar cells; Polysilane; Stability; Polysilane; Stability; Perovskite solar cells
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/j.cplett.2019.136822

[Display omitted] •Decaphenylcyclopentasilane-inserted perovskite solar cells were characterized.•Conversion efficiencies of DPPS-inserted cells were improved by annealing at 220 °C.•Surface coverage of the perovskite layer was improved by the DPPS insertion.•The DPPS layer suppressed the PbI2 formation and improved the device stability.•After 4 weeks, the 190 °C-heated device provided the highest conversion efficiency. Perovskite solar cells, in which decaphenylcyclopentasilane (DPPS) layers were formed on the surface of the CH3NH3PbI3 perovskite layer, were fabricated and characterized. The photovoltaic properties were improved by controlling the annealing temperature of the perovskite layer. For perovskite layers annealed at high temperatures of ~200 °C, the perovskite crystals were densely formed and the surface coverage of the perovskite layer was improved. The DPPS-laminated devices suppressed the formation of PbI2 crystals and the stability was improved by the DPPS layer.