Abstract:
Metal–semiconductor–metal (MSM) configuration of perovskite photodetectors (PPDs)
suggests easy and low-cost manufacturing. However, the basic structures of MSM PPDs include
vertical and lateral configurations, which require the use of expensive materials such as transparent
conductive oxides or/and sophisticated fabrication techniques such as lithography. Integrating
metallic nanowire-based electrodes into the perovskite photo-absorber layer to form one-half of
the MSM PPD structure could potentially resolve the key issues of both configurations. Here, a
manufacturing of solution-processed and self-powered MSM PPDs with embedded silver nanowire
electrodes is demonstrated. The embedding of silver nanowire electrode into the perovskite layer is
achieved by treating the silver nanowire/perovskite double layer with a methylamine gas vapor. The
evaporated gold layer is used as the second electrode to form MSM PPDs. The prepared MSM PPDs
show a photoresponsivity of 4 105 AW1 in the UV region and 2 105 AW1 in the visible region.
On average, the devices exhibit a photocurrent of 1.1 106 A under white light (75 mW cm2)
illumination with an ON/OFF ratio of 83.4. The results presented in this work open up a new method
for development and fabrication of simple, solution-processable MSM self-powered PPDs.