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A high-performance self-powered photodetector based on solution-processed nitrogen-doped graphene quantum dots/all-inorganic perovskite heterostructures

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Abstract

In this work, a self-powered and high-performance vertical type photodetector based on solution-processed nitrogen-doped graphene quantum dots and all-inorganic perovskite nanocrystals heterostructure is achieved. The vertical type NGQDs/CsPbBr3 heterojunction photodetector was fabricated using two steps of standard lithography process and drop-casting method. The vertical type NGQDs/CsPbBr3 photodetector (VTPD) exhibited a nonlinear I–V curve with an extremely low dark current of 0.38 nA and 0.29 nA at forward and reverse bias voltage of 3 V, and − 3 V, respectively. Moreover, the vertical type NGQDs/CsPbBr3 photodetector exhibited superior figure of merits (high-performance) with a light current (257.71 nA), an on/off ratio (670), responsivity (R = 3.21 A/W), specific detectivity (D* = 2.9 × 1012 J), and an external quantum efficiency (EQE = 270%) under illumination of light source with a wavelength of 520 nm and power intensity of 0.8 mW/cm2 at bias voltage of 3 V. In addition, the vertical type NGQDs/CsPbBr3 photodetector is confirmed to operate without an external bias voltage demonstrating the obvious photovoltaic characteristics of the device at 0 V. The performance of vertical type NGQDs/CsPbBr3 photodetector (VTPD) is not only surpass the performance of planar type NGQDs/CsPbBr3 photodetector (PTPD) fabricated in this work but also the performance of recently reported self-powered PDs based on carbon/perovskite, and perovskite/perovskite heterostructure. These results pave the way for exploiting solution-processed NGQDs/CsPbBr3 heterojunction to fabricate low-cost, self-powered, and high-performance optoelectronics such as solar cells, light emitting diodes, lasers, and photodetectors.

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Funding

The authors are thankful to the Deanship of Scientific Research at Najran University, Najran, Kingdom of Saudi Arabia, for funding under the Research Collaboration funding program grant no. NU/NRP/SERC/11/29.

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Authors and Affiliations

  1. Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran, 11001, Kingdom of Saudi Arabia

    Hassan Algadi

  2. Department of Electrical Engineering, Faculty of Engineering, Najran University, Najran, 11001, Kingdom of Saudi Arabia

    Hassan Algadi

  3. College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, China

    Junna Ren

  4. Vitreous State Laboratory, The Catholic University of America, Washington, DC, 20064, USA

    Asmma Alqarni

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HA contributed to the study conception and design. HA, JR, and AA performed material preparation, data collection, and analysis. JR and AA conducted data analysis and discussion. HA and JR wrote the manuscript. All authors read and approved the final manuscript.

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Algadi, H., Ren, J. & Alqarni, A. A high-performance self-powered photodetector based on solution-processed nitrogen-doped graphene quantum dots/all-inorganic perovskite heterostructures. Adv Compos Hybrid Mater 6, 98 (2023). https://doi.org/10.1007/s42114-023-00688-3

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