An Extrinsic Approach Toward Achieving Fast Response and Self‐Powered Photodetector. Issue 21 (22nd August 2018)

• Record Type: Journal Article
• Authors: Mukhokosi, Emma P.; Krupanidhi, Saluru B.; Nanda, Karuna K.
• Is Part Of: Physica status solidi. Volume 215:Issue 21(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-08-22
• Subjects: IR‐photodetector -- PEDOT:PSS -- self‐powered -- SnSe2; Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201800470
• Languages: English
• ISSNs: 1862-6300

Abstract

Abstract : An extrinsic approach toward achieving fast response and self‐powered photodetector is reported. It is shown that an organic–inorganic hybrid device (SnSe2 /PEDOT:PSS) not only operates in self‐powered mode for infra‐red photodetection but also improves the response time with respect to inorganic (SnSe2 ) linear devices. Fast response and recovery time constants of ≈1.33 and 1.22 s, respectively, are obtained. Furthermore, the sensitivity is highest at zero bias and the device is stable for over 6 months stored in open air condition. The observed photo‐current, faster response and recovery time constants are ascribed to the formation of a strong built‐in electric field at the interface between SnSe2 and PEDOT:PSS. In a broader view of these findings, the device proves its potential as a self‐powered photo‐detector and the results reported here can pave the way to design self‐powered and fast response for other wavelengths. Abstract : This work demonstrates the formation of a hetero‐structure between n‐SnSe2 thin film and organic p‐PEDOT:PSS in order to utilize the depletion width and strong built‐in potential between the two materials for its application in self‐powered infra‐red detectors.The device does not only operate in self‐powered mode but also improves the response/recovery time with respect to SnSe2 linear device.