TY - JOUR
T1 - Metal Contact and Carrier Transport in Single Crystalline CH3NH3PbBr3 Perovskite
AU - Lin, Chun-Ho
AU - Li, Ting-You
AU - Cheng, Bin
AU - Liu, Changxu
AU - Yang, Chih-Wen
AU - Ke, Jr-Jian
AU - Wei, Tzu-Chiao
AU - Li, Lain-Jong
AU - Fratalocchi, Andrea
AU - He, Jr-Hau
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2016-CRG5-3005, FCC/1/3079-08-01
Acknowledgements: This work was financially supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) (OSR-2016-CRG5-3005), KAUST solar center (FCC/1/3079-08-01), and KAUST baseline funding.
PY - 2018/9/21
Y1 - 2018/9/21
N2 - Organic-inorganic perovskites have arrived at the forefront of solar technology due to their impressive carrier lifetimes and superior optoelectronic properties. By having the cm-sized perovskite single crystal and employing device patterning techniques, and the transfer length method (TLM), we are able to get the insight into the metal contact and carrier transport behaviors, which is necessary for maximizing device performance and efficiency. In addition to the metal work function, we found that the image force and interface charge pinning effects also affect the metal contact, and the studied single crystal CH3NH3PbBr3 features Schottky barriers of 0.17 eV, 0.38 eV, and 0.47 eV for Au, Pt, and Ti electrodes, respectively. Furthermore, the surface charges lead to the thermally activated transport from 207 K to 300 K near the perovskite surface. In contrast, from 120 K to 207 K, the material exhibited three-dimensional (3D) variable range hopping (VRH) carrier transport behavior. Understanding these fundamental contact and transport properties of perovskite will enable future electronic and optoelectronic applications.
AB - Organic-inorganic perovskites have arrived at the forefront of solar technology due to their impressive carrier lifetimes and superior optoelectronic properties. By having the cm-sized perovskite single crystal and employing device patterning techniques, and the transfer length method (TLM), we are able to get the insight into the metal contact and carrier transport behaviors, which is necessary for maximizing device performance and efficiency. In addition to the metal work function, we found that the image force and interface charge pinning effects also affect the metal contact, and the studied single crystal CH3NH3PbBr3 features Schottky barriers of 0.17 eV, 0.38 eV, and 0.47 eV for Au, Pt, and Ti electrodes, respectively. Furthermore, the surface charges lead to the thermally activated transport from 207 K to 300 K near the perovskite surface. In contrast, from 120 K to 207 K, the material exhibited three-dimensional (3D) variable range hopping (VRH) carrier transport behavior. Understanding these fundamental contact and transport properties of perovskite will enable future electronic and optoelectronic applications.
UR - http://hdl.handle.net/10754/628790
UR - https://www.sciencedirect.com/science/article/pii/S2211285518306931
UR - http://www.scopus.com/inward/record.url?scp=85053845117&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2018.09.049
DO - 10.1016/j.nanoen.2018.09.049
M3 - Article
SN - 2211-2855
VL - 53
SP - 817
EP - 827
JO - Nano Energy
JF - Nano Energy
ER -