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Photodetectors: Microengineered CH 3 NH 3 PbI 3 Nanowire/Graphene Phototransistor for Low‐Intensity Light Detection at Room Temperature (Small 37/2015)
Author(s) -
Spina Massimo,
Lehmann Mario,
Náfrádi Bálint,
Bernard Laurent,
Bonvin Eric,
Gaál Richard,
Magrez Arnaud,
Forró László,
Horváth Endre
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201570228
Subject(s) - responsivity , photodetector , materials science , graphene , optoelectronics , nanowire , photodiode , halide , perovskite (structure) , light intensity , monolayer , nanotechnology , optics , chemistry , inorganic chemistry , physics , crystallography
E. Horváth and co‐workers report the first hybrid phototransistors where the performance of a network of photoactive organometal halide perovskite nanowires (methylammonium lead iodide ‐ MAPbI 3 ) is enhanced by CVD‐grown monolayer graphene. On page 4824, these microfabricated devices show responsivities as high as 2.6 × 10 6 A W −1 in the visible range. The dramatic enhancement of the responsivity at very low light intensities (pW) suggests the use of MAPbI 3 nanowire/graphene devices as lowlight imaging sensors and single photon detectors.