Enhanced photoresponsivity of all-inorganic (Cspbbr3) perovskite nanosheets photodetector with carbon nanodots (CDs)

Hassan Algadi; Chandreswar Mahata; Janghoon Woo; Minkyu Lee; Minsu Kim; Taeyoon Lee

doi:10.3390/electronics8060678

Enhanced photoresponsivity of all-inorganic (Cspbbr₃) perovskite nanosheets photodetector with carbon nanodots (CDs)

Hassan Algadi, Chandreswar Mahata, Janghoon Woo, Minkyu Lee, Minsu Kim, Taeyoon Lee

Department of Electrical and Electronic Engineering

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

A hybrid composite photodetector based on cesium lead bromine perovskite (CsPbBr₃) nanosheets and carbon nanodots (CDs) was fabricated on a quartz substrate by a one-step method of spin-coating and hot-plate annealing. The responsivity of the CsPbBr₃/CD hybrid composite photodetector was 608 mAW⁻¹ (under a 520-nm laser diode source applied at 0.2 mWcm⁻²), almost three times higher than that of a CsPbBr₃-based photodetector (221 mAW⁻¹). The enhanced performance of the CsPbBr₃/CD photodetector is attributable to the high band alignment of the CDs and CsPbBr₃, which significantly improves the charge extraction at the CsPbBr₃/CD interface. Moreover, the hybrid CsPbBr₃/CD photodetector exhibited a fast response time with a rise and decay time of 1.55 and 1.77 ms, which was faster than that of a pure CsPbBr₃ based photodetector, indicating that the CDs accelerate the extraction of electrons and holes trapped in the CsPbBr₃ film.

Original language	English
Article number	678
Journal	Electronics (Switzerland)
Volume	8
Issue number	6
DOIs	https://doi.org/10.3390/electronics8060678
Publication status	Published - 2019 Jun

Bibliographical note

Funding Information:
Funding: This work was financially supported by the National Research Foundation (NRF) of Korea (Grant NRF-2017M3A7B4049466 and NRF-2017K2A9A2A06013377). Also it was supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF-2019R1A6A1A11055660).

Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

Control and Systems Engineering
Signal Processing
Hardware and Architecture
Computer Networks and Communications
Electrical and Electronic Engineering

Access to Document

10.3390/electronics8060678

Cite this

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title = "Enhanced photoresponsivity of all-inorganic (Cspbbr3) perovskite nanosheets photodetector with carbon nanodots (CDs)",

abstract = "A hybrid composite photodetector based on cesium lead bromine perovskite (CsPbBr3) nanosheets and carbon nanodots (CDs) was fabricated on a quartz substrate by a one-step method of spin-coating and hot-plate annealing. The responsivity of the CsPbBr3/CD hybrid composite photodetector was 608 mAW−1 (under a 520-nm laser diode source applied at 0.2 mWcm−2), almost three times higher than that of a CsPbBr3-based photodetector (221 mAW−1). The enhanced performance of the CsPbBr3/CD photodetector is attributable to the high band alignment of the CDs and CsPbBr3, which significantly improves the charge extraction at the CsPbBr3/CD interface. Moreover, the hybrid CsPbBr3/CD photodetector exhibited a fast response time with a rise and decay time of 1.55 and 1.77 ms, which was faster than that of a pure CsPbBr3 based photodetector, indicating that the CDs accelerate the extraction of electrons and holes trapped in the CsPbBr3 film.",

author = "Hassan Algadi and Chandreswar Mahata and Janghoon Woo and Minkyu Lee and Minsu Kim and Taeyoon Lee",

note = "Funding Information: Funding: This work was financially supported by the National Research Foundation (NRF) of Korea (Grant NRF-2017M3A7B4049466 and NRF-2017K2A9A2A06013377). Also it was supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF-2019R1A6A1A11055660). Publisher Copyright: {\textcopyright} 2019 by the authors. Licensee MDPI, Basel, Switzerland.",

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doi = "10.3390/electronics8060678",

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AU - Algadi, Hassan

AU - Mahata, Chandreswar

AU - Woo, Janghoon

AU - Lee, Minkyu

AU - Kim, Minsu

AU - Lee, Taeyoon

N1 - Funding Information: Funding: This work was financially supported by the National Research Foundation (NRF) of Korea (Grant NRF-2017M3A7B4049466 and NRF-2017K2A9A2A06013377). Also it was supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF-2019R1A6A1A11055660). Publisher Copyright: © 2019 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2019/6

Y1 - 2019/6

N2 - A hybrid composite photodetector based on cesium lead bromine perovskite (CsPbBr3) nanosheets and carbon nanodots (CDs) was fabricated on a quartz substrate by a one-step method of spin-coating and hot-plate annealing. The responsivity of the CsPbBr3/CD hybrid composite photodetector was 608 mAW−1 (under a 520-nm laser diode source applied at 0.2 mWcm−2), almost three times higher than that of a CsPbBr3-based photodetector (221 mAW−1). The enhanced performance of the CsPbBr3/CD photodetector is attributable to the high band alignment of the CDs and CsPbBr3, which significantly improves the charge extraction at the CsPbBr3/CD interface. Moreover, the hybrid CsPbBr3/CD photodetector exhibited a fast response time with a rise and decay time of 1.55 and 1.77 ms, which was faster than that of a pure CsPbBr3 based photodetector, indicating that the CDs accelerate the extraction of electrons and holes trapped in the CsPbBr3 film.

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