Spray-Coated CsPbBr3 Quantum Dot Films for Perovskite Photodiodes

ACS Applied Materials & Interfaces
Zhi YangJinyou Shao

Abstract

Large-area film deposition and high material utilization ratio are the crucial factors for large-scale application of perovskite optoelectronics. Recently, all-inorganic halide perovskite CsPbBr3 has attracted great attention because of its high phase stability, thermal stability, and photostability. However, most reported perovskite devices were fabricated by spin-coating, suffering from a low material utilization ratio of 1% and a small coverage area. Here, we developed a spray-coating technique to fabricate a CsPbBr3 quantum dot (QD) film photodiode which had a high material utilization ratio of 32% and a deposition rate of 9 nm/s. The film growth process was studied, and substrate temperature and spray time were two key factors for the deposition of uniform and crack-free QD films. The spray-coated photodiode was demonstrated to be more suitable for working in the photodetector mode because a low dark current density of 4 × 10-4 mA cm-2 resulting from an extremely low recombination current contributed to a high detectivity of 1 × 1014 Jones. A high responsivity of 3 A W-1 was obtained at -0.7 V under 365 nm illumination, resulting from a low charge-transfer resistance and a high charge recombination resistance. We believe t...Continue Reading

References

Apr 24, 2014·ACS Applied Materials & Interfaces·Troy K TownsendJoseph G Tischler
Nov 11, 2014·Advanced Materials·Illan J KramerEdward H Sargent
Nov 21, 2014·Nature Communications·Letian DouYang Yang
Aug 12, 2015·The Journal of Physical Chemistry Letters·Hsin-Wei ChenTsutomu Miyasaka
Aug 13, 2015·The Journal of Physical Chemistry Letters·Michael KulbakGary Hodes
Sep 10, 2015·ACS Applied Materials & Interfaces·Zhi YangJinyou Shao
Dec 25, 2015·The Journal of Physical Chemistry Letters·Michael KulbakDavid Cahen
Aug 19, 2016·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Stephan V Roth
Dec 15, 2016·Journal of the American Chemical Society·Jia LiangJie Liu
Apr 6, 2017·Scientific Reports·Hyekyoung ChoiSohee Jeong
Jun 8, 2017·Nature Communications·Liuqi ZhangJingbi You
Apr 3, 2018·The Journal of Physical Chemistry Letters·James E BishopDavid G Lidzey

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Citations

Dec 11, 2019·Nanomaterials·Kaixuan SongJianjun Tian
Apr 20, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Jimmie Mitchell, Jeffrey J Weimer
Jan 21, 2021·The Journal of Physical Chemistry Letters·Jifeng YuanJianjun Tian
Sep 23, 2020·ACS Applied Materials & Interfaces·James Edward BishopDavid G Lidzey
Jan 16, 2022·Advanced Science·Lu LiuShengzhong Frank Liu

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