Open AccessMAPbBr3 single crystal based metal-semiconductor-metal photodetector enhanced by localized surface plasmon
Author(s) -
Ziqi Zhang,
Kang Chen,
Wei Xia,
Zhiyuan Zuo
Publication year - 2020
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/abd0a6
Subject(s) - photodetector , materials science , photocurrent , responsivity , optoelectronics , semiconductor , plasmon , single crystal , metal , crystal (programming language) , surface plasmon , nanoparticle , grain boundary , nanotechnology , crystallography , chemistry , microstructure , computer science , programming language , metallurgy
Hybrid organic-inorganic lead halide perovskites (HOIPs) have appealed to researchers on account of excellent optoelectronic properties. Compared with films which possess grain boundaries, HOIPs single crystals with fewer defects behave excellent transport and recombination performances. In the family of HOIPs, single crystals of MAPbX 3 (MA = CH 3 NH 3 + , X = Cl, Br or I) are recognized as the most competitive candidates for optoelectronic applications. However, the photodetectors based on MAPbX 3 have difficulties in detecting weak signals for lacking of gains without structure optimizations and extra energy transfer channels. In this study, taking advantage of MAPbBr 3 single crystal (100) facets, planar metal-semiconductor-metal (MSM) photodetectors were fabricated with Au zigzag electrodes and modified Au nanoparticles (NPs) to realize localized Au surface plasmons (SPs). Compared to device without Au NPs, 2 times enhancement of photocurrent and responsivity have been achieved under 630 nm photon irradiation and 5 V bias. Furthermore, the surface metal structures can inhibit ionic migration to a certain extent. Potential mechanisms of the enhancements and suppressions are discussed in details to reveal the applications of this technique.