Efficient Production of Phosphorene Nanosheets via Shear Stress Mediated Exfoliation for Low-Temperature Perovskite Solar Cells

Munkhbayar Batmunkh, Kasturi Vimalanathan, Congcong Wu, Abdulaziz S.R. Bati, Le Ping Yu, Sherif Abdulkader Tawfik, Michael J. Ford, Thomas J. Macdonald, Colin L. Raston, Shashank Priya, Christopher T. Gibson, Joseph G. Shapter

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

A simple and fast “top-down” protocol is introduced herein to prepare solution processable few-layer phosphorene nanosheets using vortex fluidic mediated exfoliation under near-infrared (NIR) pulsed laser irradiation. This novel shear-exfoliation method requires short processing times and produces highly crystalline, atomically thin phosphorene nanosheets (4.3 ± 0.4 nm). The as-prepared phosphorene nanosheets are used as an effective electron transporting material (ETM) for low-temperature processed, planar n-i-p perovskite solar cells (PSCs). With the addition of phosphorene, the average power conversion efficiency (PCE) increases from 14.32% to 16.53% with a maximum PCE of 17.85% observed for the phosphorene incorporated PSCs which is comparable to the devices made using the traditional high-temperature protocol. Experimental and theoretical (density-functional theory) investigations reveal the PCE improvements are due to the high carrier mobility and suitable band energy alignment of the phosphorene. The work not only paves the way for novel synthesis of 2D materials, but also opens a new avenue in using phosphorene as an efficient ETM in photovoltaic devices.

Original languageEnglish (US)
Article number1800521
JournalSmall Methods
Volume3
Issue number5
DOIs
StatePublished - May 1 2019

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Chemistry(all)

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