Abstract
We report the fabrication and demonstration of perovskite-based photodetector-response in the lateral device geometry. Two different types of detectors were fabricated and compared to study the effects of the lateral and radial electric field on device response. The first type of device consisted of a 2D (BA2MAn−1PbnBr3n+1)/3D (CsPbBr3) perovskite heterojunction and the second consisted of MoS2/CsPbBr3 in the active layer. High-quality perovskite films were deposited by thermal evaporation and the presence of distinct phases was confirmed by x-ray diffraction and PL studies. Additionally, MoS2 thin films were grown by pulsed laser deposition with Raman measurements showing the presence of a few layers of MoS2. The photoresponse of the 2D/3D perovskite halide device was measured under monochromatic illumination in the UV–Visible region. These 2D/3D based devices exhibit a responsivity, external quantum efficiency and linear dynamic range of 1.02 A/W, 276.6% and 77 dB, respectively, at 1-V operational bias. The photoresponse of the MoS2/CsPbBr3 devices were measured under 385 nm illumination and the responsivity, sensitivity, external quantum efficiency and specific detectivity at 10 V bias were found to be 0.4 mA/W, 1.2, 0.13% and 3.5 × 109 Jones, respectively. Graphic Abstract: [Figure not available: see fulltext.]
Original language | English |
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Pages (from-to) | 7214-7221 |
Number of pages | 8 |
Journal | Journal of Electronic Materials |
Volume | 50 |
Issue number | 12 |
DOIs | |
State | Published - Dec 2021 |
Externally published | Yes |
Funding
The author S. Dias is grateful to the SERB National Postdoctoral Fellowship for financial support in carrying out this work. The authors are grateful to Prof. S. B. Krupanidhi for the usage of the PLD and thermal evaporation systems. We thank Dr. Devanshi Bhardwaj for help with the PLD. We thank Prof. K.S. Narayan for the usage of the lab facilities and overall guidance in this work.
Keywords
- 2D (BAMAPbBr)/3D (CsPbBr)
- lateral and radial electric field
- lateral device
- MoS/CsPbBr
- Perovskite photodetectors