Pixellated Perovskite Photodiode on IGZO Thin Film Transistor Backplane for Low Dose Indirect X-Ray Detection
| Autor: | Yong-Young Noh, Yangbing Xu, Hang Zhou, Taoyu Zou, Jun Chen, Shengdong Zhang, Chuan Liu, Ben Xiang, Kai Wang, Ya Wang, Qing Dai |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Photodetector thin-film transistors 02 engineering and technology Scintillator 010402 general chemistry 01 natural sciences law.invention law Sensitivity (control systems) Electrical and Electronic Engineering perovskite Perovskite (structure) business.industry Transistor IGZO X-ray detectors 021001 nanoscience & nanotechnology TK1-9971 0104 chemical sciences Electronic Optical and Magnetic Materials Photodiode Thin-film transistor Optoelectronics Electrical engineering. Electronics. Nuclear engineering Flat-panel imager 0210 nano-technology business Biotechnology Dark current |
| Zdroj: | IEEE Journal of the Electron Devices Society, Vol 9, Pp 96-101 (2021) |
| ISSN: | 2168-6734 |
| Popis: | The integration of perovskite photodetectors with thin-film transistor (TFT) backplane or complementary metal-oxide-semiconductor CMOS circuit is a key step towards prototyping perovskite-based image sensors. Here, we demonstrate a pixel configuration for indirect X-ray detection comprising of IGZO TFTs and perovskite photodiodes (PDs). The perovskite photodiode is patterned by a two-step deposition method. Our integrated TFT/PD pixel shows a weak light detection capability down to 4 nW cm−2 and a fast-transient response to the pulse light and gate switching. Combining with a CsI scintillator, the integrated pixel achieves a specific X-ray sensitivity of 8.2 $8.2 \times 10^{2} \mu \mathrm{C} \mathrm{mGy}_{\text {air }}^{-1} \mathrm{~cm}^{-3}$ . Theoretically, with a state-of-the-art scintillator, the new pixel can provide a detectable signal for X-ray imaging at a dose rate as low as $10 \mu \mathrm{Gy}_{\text {air }} \mathrm{s}^{-1}$ . This work provides an advanced pixel design for high resolution, high sensitivity, and high frame-rate flat-panel imager. |
| Databáze: | OpenAIRE |
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