Paper Based Organic–Inorganic Hybrid Photodetector for Visible Light Detection

Abstract Photodetectors based on organic-inorganic hybrid are promising which can combine the merits like function tunability of organic materials as well as broadband absorption, excitonic mechanisms and high carrier mobility of inorganic materials. Flexible thin film photodetectors based on inorganic WSe2 nanosheets and organic PANI by tuning composition are developed by simple, cost effective solution blending process. The fabricated hybrid thin films on filter paper substrate manifest visible light detection with high responsivity, fast photoswitching and high specific detectivity. In addition, the performance of hybrid film is retained even after 400 bending cycles. In case of WSe2-PANI hybrid films, the enhanced photoresponse is due to change in work function between PANI and WSe2 nanosheets, local electric fields are formed at WSe2-PANI interface thereby generating a greater number of photogenerated electrons. Compared with other hybrid-based photodetectors, this work advocates huge development in future applications in wearable electronics, security surveillance, high-performance optoelectronics, etc.