TY - JOUR
T1 - Surface Effect on 2D Hybrid Perovskite Crystals: Perovskites Using an Ethanolamine Organic Layer as an Example
AU - Ho, Kang-Ting
AU - Leung, Siu
AU - Li, Ting-You
AU - Maity, Partha
AU - Cheng, Bin
AU - Fu, Hui-Chun
AU - Mohammed, Omar F.
AU - He, Jr-Hau
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: K.T.H. and S.F.L. contributed equally to this work. This work was financially supported by the Office of Sponsored Research of King Abdullah University of Science and Technology (KAUST), KAUST Sensor Initiativ, KAUST Solar Center, and KAUST baseline funding.
PY - 2018/10/1
Y1 - 2018/10/1
N2 - Despite the remarkable progress of optoelectronic devices based on hybrid perovskites, there are significant drawbacks, which have largely hindered their development as an alternative of silicon. For instance, hybrid perovskites are well-known to suffer from moisture instability which leads to surface degradation. Nonetheless, the dependence of the surface effect on the moisture stability and optoelectronic properties of hybrid perovskites has not been fully investigated. In this work, the influence of the surface effect of 2D layered perovskites before and after mechanical exfoliation, representing rough and smooth surfaces of perovskite crystals, are studied. It is found that the smooth 2D perovskite is less sensitive to ambient moisture and exhibits a considerably low dark current, which outperforms the rough perovskites by 23.6 times in terms of photodetectivity. The superior moisture stability of the smooth perovskites over the rough perovskites is demonstrated. Additionally, ethanolamine is employed as an organic linker of the 2D layered perovskite, which further improves the moisture stability. This work reveals the strong dependence of the surface conditions of 2D hybrid perovskite crystals on their moisture stability and optoelectronic properties, which are of utmost importance to the design of practical optoelectronic devices based on hybrid perovskite crystals.
AB - Despite the remarkable progress of optoelectronic devices based on hybrid perovskites, there are significant drawbacks, which have largely hindered their development as an alternative of silicon. For instance, hybrid perovskites are well-known to suffer from moisture instability which leads to surface degradation. Nonetheless, the dependence of the surface effect on the moisture stability and optoelectronic properties of hybrid perovskites has not been fully investigated. In this work, the influence of the surface effect of 2D layered perovskites before and after mechanical exfoliation, representing rough and smooth surfaces of perovskite crystals, are studied. It is found that the smooth 2D perovskite is less sensitive to ambient moisture and exhibits a considerably low dark current, which outperforms the rough perovskites by 23.6 times in terms of photodetectivity. The superior moisture stability of the smooth perovskites over the rough perovskites is demonstrated. Additionally, ethanolamine is employed as an organic linker of the 2D layered perovskite, which further improves the moisture stability. This work reveals the strong dependence of the surface conditions of 2D hybrid perovskite crystals on their moisture stability and optoelectronic properties, which are of utmost importance to the design of practical optoelectronic devices based on hybrid perovskite crystals.
UR - http://hdl.handle.net/10754/630574
UR - https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201804372
UR - http://www.scopus.com/inward/record.url?scp=85054155248&partnerID=8YFLogxK
U2 - 10.1002/adma.201804372
DO - 10.1002/adma.201804372
M3 - Article
C2 - 30276878
SN - 0935-9648
VL - 30
SP - 1804372
JO - Advanced Materials
JF - Advanced Materials
IS - 46
ER -