کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350322 | 1503659 | 2014 | 34 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A high-sensitivity, fast-response, rapid-recovery p-n heterojunction photodiode based on rutile TiO2 nanorod array on p-Si(1Â 1Â 1)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The growth and characterization of a p-n heterojunction photodiode were studied. This photodiode was based on rutile TiO2 nanorods (NRs) grown on p-type (1Â 1Â 1)-oriented silicon substrate seeded with a TiO2 layer synthesized by radio-frequency (RF) reactive magnetron sputtering. Chemical bath deposition (CBD) was performed to grow rutile TiO2 NRs on Si substrate. The structural and optical properties of the sample were studied by X-ray diffraction (XRD) and field emission-scanning electron microscopy (FESEM) analyses. Results showed the tetragonal rutile structure of the synthesized TiO2 NRs. Optical properties were further examined by photoluminescence spectroscopy, and a high-intensity UV peak centered at around 392Â nm compared with visible defect peaks centered at 527 and 707Â nm was observed. Upon exposure to 395Â nm light (2.3Â mW/cm) at five-bias voltage, the device showed 2.9Â ÃÂ 102 sensitivity. In addition, the internal gain of the photodiode was 3.92, and the photoresponse peak was 106Â mA/W. Furthermore, the photocurrent was 3.06Â ÃÂ 10â4Â A. The response and the recovery times were calculated to be 10.4 and 11Â ms, respectively, upon illumination to a pulse UV light (405Â nm, 0.22Â mW/cm2) at five-bias voltage. All of these results demonstrate that this high-quality photodiode can be a promising candidate as a low-cost UV photodetector for commercially integrated photoelectronic applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 305, 30 June 2014, Pages 445-452
Journal: Applied Surface Science - Volume 305, 30 June 2014, Pages 445-452
نویسندگان
Abbas M. Selman, Z. Hassan, M. Husham, Naser M. Ahmed,