1 research outputs found
Halide Perovskite Nanopillar Photodetector
Numerous studies have reported the
use of halide perovskites as highly functional light-harvesting materials.
The development of optimized compositions and deposition approaches
has led to impressive improvements; however, no noticeable breakthrough
in performance has been observed for these materials recently. Here,
a breakthrough that enables the fabrication of vertically grown halide
perovskite (VGHP) nanopillar photodetectors <i>via</i> a
nanoimprinting crystallization technique is demonstrated. We used
engraved nanopatterned polymer stamps to form VGHP nanopillars during
the pressurized crystallization of the softly baked gel state of a
methylammonium lead iodide (CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>, denoted MAPI) film. The VGHP films exhibit much lower defect density
and higher conductivity, as supported by current–voltage characteristic
measurements and conductive atomic force microscopy measurements.
Ultimately, two-terminal lateral photodetectors based on the VGHP
nanopillar films show a greatly enhanced photoresponse compared with
flat film-based photodetectors. We expect that the deposition method
presented here will help surpass the technical limits and contribute
to further improvements in various halide-perovskite-based devices