Controllable deposition of organic metal halide perovskite films with wafer-scale uniformity by single source flash evaporation

Woocheol Lee, Jonghoon Lee, Hyeon Dong Lee, Junwoo Kim, Heebeom Ahn, Youngrok Kim, Daekyoung Yoo, Jeongjae Lee, Tae Woo Lee, Keehoon Kang, Takhee Lee

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1 Citation (Scopus)

Abstract

Conventional solution-processing techniques such as the spin-coating method have been used successfully to reveal excellent properties of organic–inorganic halide perovskites (OHPs) for optoelectronic devices such as solar cell and light-emitting diode, but it is essential to explore other deposition techniques compatible with large-scale production. Single-source flash evaporation technique, in which a single source of materials of interest is rapidly heated to be deposited in a few seconds, is one of the candidate techniques for large-scale thin film deposition of OHPs. In this work, we investigated the reliability and controllability of the single-source flash evaporation technique for methylammonium lead iodide (MAPbI3) perovskite. In-depth statistical analysis was employed to demonstrate that the MAPbI3 films prepared via the flash evaporation have an ultrasmooth surface and uniform thickness throughout the 4-inch wafer scale. We also show that the thickness and grain size of the MAPbI3 film can be controlled by adjusting the amount of the source and number of deposition steps. Finally, the excellent large-area uniformity of the physical properties of the deposited thin films can be transferred to the uniformity in the device performance of MAPbI3 photodetectors prepared by flash evaporation which exhibited the responsivity of 0.2 A/W and detectivity of 3.82 × 1011 Jones.

Original languageEnglish
Article number18781
JournalScientific reports
Volume10
Issue number1
DOIs
Publication statusPublished - 2020 Dec 1

Bibliographical note

Funding Information:
The authors appreciate the financial support of the National Creative Research Laboratory Programs (Grant Nos. 2012026372, NRF-2016R1A3B1908431) through the National Research Foundation of Korea (NRF) funded by the Korean Ministry of Science and ICT. K. K appreciates the financial support by Postdoctoral Science Fellowship from POSCO TJ Park Foundation.

Publisher Copyright:
© 2020, The Author(s).

All Science Journal Classification (ASJC) codes

  • General

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