4.6 Article

Performance-enhanced solar-blind photodetector based on a CH3NH3PbI3/β-Ga2O3 hybrid structure

Journal

JOURNAL OF MATERIALS CHEMISTRY C
Volume 7, Issue 45, Pages 14205-14211

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc05115e

Keywords

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Funding

  1. National Natural Science Foundation of China [61675092, 61705086, 61601404]
  2. Natural Science Foundation of Guangdong Province [2016A030313079, 2016A030311019, 2017A030313375]
  3. Special Funds for Major Science and Technology Projects of Guangdong Province [2019B010138004, 2017A010102006, 2015B010125007]
  4. Project of Guangzhou Industry Leading Talents [CXLJTD-201607]
  5. Planned Science & Technology Project of Guangzhou [201707010396, 2016B010111003]
  6. Aeronautical Science Foundation of China [201708W4001, 201808W4001]
  7. Joint fund of pre-research for equipment, Ministry of Education of China [6141A02022124]
  8. Foundation for Distinguished Young Talents in Higher Education of Guangdong [2018KQNCX009]
  9. Fundamental Research Funds for the Central Universities [21619402, 11618413]
  10. State Key Laboratory of Applied Optics [SKLAO-201914]

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Solar-blind photodetectors have drawn great attention due to their excellent accuracy and precision ignoring the electromagnetic radiation interference from the sun. Here, we demonstrate a solar-blind photodetector by combining the inorganic wide bandgap semiconductor beta-Ga2O3 with organic-inorganic hybrid perovskite (CH3NH3PbI3) for the first time. The photodetector with an intelligent architecture design and assembly technique was developed via a facile and low-cost solution processing method. Compared with the pure beta-Ga2O3 photodetector, the performances of the device based on the CH3NH3PbI3/beta-Ga2O3 hybrid structure were significantly enhanced. The photo-to-dark current ratio is 1460, the responsivity and detectivity are 85 mA W-1 and 1.28 x 10(11) Jones, respectively. The device exhibits excellent reproducibility and stability under DUV light illumination, the rise and decay times are 0.11 and 0.45 s, respectively. The superior solar-blind/UVA rejection ratio (I-254nm/I-325nm) with a value of 221 indicates that our fabricated photodetector has an excellent sensitivity in the solar-blind region. This work can offer a new strategy to develop cheap and high-performance solar-blind photodetectors based on beta-Ga2O3.

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