Jump to main content
Jump to site search


Monolayer-like Hybrid Halide Perovskite Films Prepared by Additive Engineering without Antisolvent for Solar Cells

Abstract

Searching for a simple method to replace the conventional antisolvent process with the objective of achieving a high-quality perovskite film is indispensable for the practical manufacture of solar cells. In this work, we explored an antisolvent-free additive engineering to fabricate compact CH3NH3PbI3 (MAPbI3) perovskite films combining the coordination effect of methylammonium chloride (MACl) and methylammonium acetate (MAAc). The MACl coordination with organic and metal halides in the precursor solution has resulted in the perovskite film having a large grain size and a single crystal-like cross-section profile (monolayer-like). The introduction of MAAc into the precursor solution has reduced the perovskite film shrinkage after a film deposition, presumably due to an increased nucleation rate. Consequently, we succeeded in fabricating the high-quality monolayer-like perovskite film with a micro-scale grain size (~2 μm), a smooth surface and an enhanced crystallinity. The time-resolved photoluminescence (PL) spectra and space-charge limited current (SCLC) measurements have validated a significantly reduced density of trap states, which has an imminent impact on the perovskite film quality. As a result, the power conversion efficiency (PCE) of the perovskite solar cells (PSCs) using the mixture additive rises to 19.64%, which is much large than that of devices using single MACl additive (15.61%). Accordingly, this work would support a new one-step fabrication method of high-quality perovskite films for the coming generation of PSCs

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 May 2018, accepted on 12 Jul 2018 and first published on 13 Jul 2018


Article type: Paper
DOI: 10.1039/C8TA04794D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
  •   Request permissions

    Monolayer-like Hybrid Halide Perovskite Films Prepared by Additive Engineering without Antisolvent for Solar Cells

    M. Wang, B. Li, P. Siffalovic, L. Chen, G. Cao and J. Tian, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA04794D

Search articles by author

Spotlight

Advertisements