Self-standing polyvinyl chloride film as flexible substrate for WSe2 based photodetector

• Published in: Current applied physics Vol. 39; pp. 140 - 146
• Main Authors: Kannichankandy, Drishya, Pataniya, Pratik M., Dhamecha, Vishal, Pathak, Vivek M., Solanki, Gunvant K.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2022; 한국물리학회
• Subjects: DVT technique; Photodetector; PVC polymer; WSe2 microcrystals; 물리학; PVC polymer; WSe2 microcrystals; Photodetector; DVT technique
• ISSN: 1567-1739; 1878-1675
• DOI: 10.1016/j.cap.2022.04.018

Self-standing polymer materials have gained recognition as a flexible substrate for various optoelectronic devices. Here, we incorporated polyvinyl chloride (PVC) with tungsten diselenide (WSe2) microcrystals. The WSe2 microcrystals are added to PVC by solution mixing process. The WSe2-PVC composite film possess excellent flexibility, electrical conductivity of 20 kΩsq−1 at room temperature, high photoresponsivity of 0.3310 mAW−1, detectivity of 1.527 x 109 Jones and external quantum efficiency up to 8.7%. The free-standing WSe2-PVC photodetectors show durability and reproducibility even after 7 months and show stable photoresponse in the bent state. The visible light WSe2-PVC photodetector is sensitive to different monochromatic radiations (470 nm, 540 nm and 670 nm) and demonstrates potential applications in next-generation wearable optoelectronic devices. [Display omitted] •The microcrystals of WSe2 are grown by direct vapor transport technique.•The free-standing photodetector was prepared by solution mixing process.•The WSe2-PVC photodetector show durability and reproducibility even after 7 months.•The flexible photodetector is sensitive to different monochromatic radiations.