Enhanced Photoresponsivity of All-Inorganic (CsPbBr3) Perovskite Nanosheets Photodetector with Carbon Nanodots (CDs)

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 (...

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Published in:Electronics (Basel) 2019-06, Vol.8 (6), p.678
Main Authors: Algadi, Hassan, Mahata, Chandreswar, Woo, Janghoon, Lee, Minkyu, Kim, Minsu, Lee, Taeyoon
Format: Article
Language:English
Subjects:
Bromine
Carbon
Cesium
Diodes
Efficiency
Electrodes
Grain boundaries
Graphene
Hybrid composites
Lasers
Microscopy
Nanosheets
Optical properties
Perovskites
Photometers
Quantum dots
Response time
Semiconductor lasers
Spin coating
Substrates
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cited_by cdi_FETCH-LOGICAL-c319t-8aa8c54c311d22110ecd25204de68b9146cc96374ba28526d75b983160c766533
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creator Algadi, Hassan
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Woo, Janghoon
Lee, Minkyu
Kim, Minsu
Lee, Taeyoon
description 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.
doi_str_mv 10.3390/electronics8060678
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subjects Bromine
Carbon
Cesium
Diodes
Efficiency
Electrodes
Grain boundaries
Graphene
Hybrid composites
Lasers
Microscopy
Nanosheets
Optical properties
Perovskites
Photometers
Quantum dots
Response time
Semiconductor lasers
Spin coating
Substrates
title Enhanced Photoresponsivity of All-Inorganic (CsPbBr3) Perovskite Nanosheets Photodetector with Carbon Nanodots (CDs)
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