High performance photodiodes based on chemically processed Cu doped SnS 2 nanoflakes

•Cu doped SnS2 nanoflakes were synthesized in hexagonal phase.•Nature of charge carriers/carrier density was determined using Mott-Schottky plots.•Photodiode based on Cu doped SnS2 nanoflakes were fabricated on p-Si substrate.•Photodiode revealed improved photocurrent and responsitivity values under illumination.