Improvement of interfacial contact for efficient PCBM/MAPbI3planar heterojunction solar cells with a binary antisolvent mixture treatment

Anjali Chandel, Jia Ren Wu, Diksha Thakur, Said Kassou, Shou En Chiang, Kai Jen Cheng, Chung Yu Li, Yung Sheng Yen, Sheng Hui Chen, Sheng Hsiung Chang

Research output: Contribution to journalArticlepeer-review

Abstract

Atomic-force microscopic images, x-ray diffraction patterns, Urbach energies and photoluminescence quenching experiments show that the interfacial contact quality between the hydrophobic [6,6]-phenyl-C61-buttric acid methyl ester (PCBM) thin film and hydrophilic CH3NH3PbI3 (MAPbI3) thin film can be effectively improved by using a binary antisolvent mixture (toluene:dichloromethane or chlorobenzene:dichloromethane) in the anti-solvent mixture-mediated nucleation process, which increases the averaged power conversion efficiency of the resultant PEDOT:PSS (P3CT-Na) thin film based MAPbI3 solar cells from 13.18% (18.52%) to 13.80% (19.55%). Beside, the use of 10% dichloromethane (DCM) in the binary antisolvent mixture results in a nano-textured MAPbI3 thin film with multicrystalline micrometer-sized grains and thereby increasing the short-circuit current density and fill factor (FF) of the resultant solar cells. It is noted that a remarkable FF of 80.33% is achieved, which can be used to explain the stable photovoltaic performance without additional encapsulations.

Original languageEnglish
Article number485401
JournalNanotechnology
Volume32
Issue number48
DOIs
StatePublished - 26 Nov 2021

Keywords

  • binary antisolvent mixture
  • chlorobenzene:dichloromethane
  • MAPbIsolar cells
  • PCBM/MAPbIinterface
  • toluene: dichloromethane

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