Photocurrent characteristics of solution-processed mercury sul?de nanoparticles-thin films on plastic substrates

In this study, we synthesize mercury sul?de (HgS) nanoparticles (NPs) by the colloidal method and investigate the optoelectronic characteristics of the resulting HgS NPs-thin ?lms on plastic substrates in air at room temperature. The HgS NPs with a size of about 6-nm show quantum con?nement effects in the absorption and photoluminescence spectra of the HgS NPs-thin ?lm. The ?exible optoelectronic device is constructed with the HgS NPs-thin ?lm on ?nger-pattered Au electrodes. When 325-nm wavelength light is irradiated on the HgS NPs-thin ?lm, charge carriers are photogenerated and transported by the hopping mechanism, thereby giving birth to a photocurrent in the ?lm. The photocurrent ef?ciency at a bias voltage of5Visestimated to be 1.6 μA/W ̇ cm ² and the photocurrent ef?ciency in the 1000 cycles-bending test changes by less than one order of magnitude compared to its initial value before bending.