TY - JOUR
T1 - The Surface of Hybrid Perovskite Crystals: A Boon or Bane
AU - Banavoth, Murali
AU - Yengel, Emre
AU - Yang, Chen
AU - Peng, Wei
AU - Alarousu, Erkki
AU - Bakr, Osman
AU - Mohammed, Omar F.
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: King Abdullah University of Science and Technology (KAUST) supported the work reported here.
PY - 2017/3/17
Y1 - 2017/3/17
N2 - Hybrid perovskite single crystals have garnered tremendous research attention and are expected to be next-generation materials for high-efficiency photoactive devices. Therefore, it is fundamentally important to understand the 8 relationship between the optoelectronic properties of these materials and the marginally exploited surface chemistry in ambient air. For instance, a strong surface disorder, including hydration and ion migration, can possibly lead to extremely different optical and electronic properties at the surface compared to the bulk of the single crystal (SC). From this perspective, we evaluate the key variables that underlie the perovskite SC surface restructuring in ambient air and discuss their merits and limitations. In addition, a comprehensive picture of surface disordering, the remarkable change in the charge carrier dynamics and carrier mobility, surface hydration, and the effect of ion migration on the surface behavior will be discussed. Finally, surface passivation methods are highlighted to resolve or overcome the challenges for device integration.
AB - Hybrid perovskite single crystals have garnered tremendous research attention and are expected to be next-generation materials for high-efficiency photoactive devices. Therefore, it is fundamentally important to understand the 8 relationship between the optoelectronic properties of these materials and the marginally exploited surface chemistry in ambient air. For instance, a strong surface disorder, including hydration and ion migration, can possibly lead to extremely different optical and electronic properties at the surface compared to the bulk of the single crystal (SC). From this perspective, we evaluate the key variables that underlie the perovskite SC surface restructuring in ambient air and discuss their merits and limitations. In addition, a comprehensive picture of surface disordering, the remarkable change in the charge carrier dynamics and carrier mobility, surface hydration, and the effect of ion migration on the surface behavior will be discussed. Finally, surface passivation methods are highlighted to resolve or overcome the challenges for device integration.
UR - http://hdl.handle.net/10754/623922
UR - http://pubs.acs.org/doi/full/10.1021/acsenergylett.6b00680
UR - http://www.scopus.com/inward/record.url?scp=85019750376&partnerID=8YFLogxK
U2 - 10.1021/acsenergylett.6b00680
DO - 10.1021/acsenergylett.6b00680
M3 - Article
SN - 2380-8195
VL - 2
SP - 846
EP - 856
JO - ACS Energy Letters
JF - ACS Energy Letters
IS - 4
ER -