Cost-effective sustainable-engineering of CH3NH3PbI3 perovskite solar cells through slicing and restacking of 2D layers

Congcong Wu, Haijin Li, Yongke Yan, Bo Chi, Jian Pu, Jian Li, Mohan Sanghadasa, Shashank Priya

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Owing to their high conversion efficiency and potentially cost-effective manufacturing, organic–inorganic lead halide perovskite solar cells (PSCs) have been dominant photovoltaic research topic in this decade. The photovoltaic performance of PSCs is highly dependent upon the quality of perovskite layer. In order to advance the deployment of PSCs, fabrication of high-quality perovskite film using a facile and sustainable process is essential. This study provides significant breakthrough in this direction. A novel fabrication process is demonstrated that allows slicing of 2D layers from single crystals and restacking them to fabricate high-quality perovskite film. The discovery that CH3NH2 can slice the 3D CH3NH3PbI3 perovskite crystal into 2D layered perovskite intermediates via intercalation process opens a new pathway for pursuing synthesis of a variety of photovoltaic materials. The 2D layered intermediate shows high solubility in acetonitrile (ACN) solvent, which is considered as a replacement for N, N-dimethylformamide (DMF) in order to enable sustainable processing. This solvent system enables fabrication of high-quality perovskite layer by one-step synthesis method. Based on this cost-effective sustainable synthesis approach, low temperature processed PSC was found to match the performance of PSC synthesized using high temperature process.

Original languageEnglish (US)
Pages (from-to)295-302
Number of pages8
JournalNano Energy
Volume36
DOIs
StatePublished - Jun 1 2017
Externally publishedYes

Bibliographical note

Funding Information:
The authors acknowledge the financial support from the Institute of Critical Technology and Applied Science (ICTAS). Authors S.P. would like to acknowledge the financial support from Office of Naval Research (I. Perez). Y.Y. was supported through the AMRDEC participation in NSF I/UCRC: Center for Energy Harvesting Materials and Systems (CEHMS).

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • 2D layers
  • Perovskite
  • Restack
  • Slice
  • Sustainable solvent

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