تقرير
Graphene-perovskite fibre photodetectors
| العنوان: | Graphene-perovskite fibre photodetectors |
|---|---|
| المؤلفون: | Akhavan, S., Najafabadi, A. Taheri, Mignuzzi, S., Jalebi, M. Abdi, Ruocco, A., Paradisanos, I., Balci, O., Andaji-Garmaroudi, Z., Goykhman, I., Occhipinti, L. G., Lidorikis, E., Stranks, S. D., Ferrari, A. C. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Applied Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science |
| الوصف: | The integration of optoelectronic devices, such as transistors and photodetectors (PDs), into wearables and textiles is of great interest for applications such as healthcare and physiological monitoring. These require flexible/wearable systems adaptable to body motions, thus materials conformable to non-planar surfaces, and able to maintain performance under mechanical distortions. Here, we prepare fibre PDs combining rolled graphene layers and photoactive perovskites. Conductive fibres ($\sim$500$\Omega$/cm) are made by rolling single layer graphene (SLG) around silica fibres, followed by deposition of a dielectric layer (Al$_{2}$O$_{3}$ and parylene C), another rolled SLG as channel, and perovskite as photoactive component. The resulting gate-tunable PDs have response time$\sim$5ms, with an external responsivity$\sim$22kA/W at 488nm for 1V bias. The external responsivity is two orders of magnitude higher and the response time one order of magnitude faster than state-of-the-art wearable fibre based PDs. Under bending at 4mm radius, up to$\sim$80\% photocurrent is maintained. Washability tests show$\sim$72\% of initial photocurrent after 30 cycles, promising for wearable applications. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2311.11450 |
| رقم الأكسشن: | edsarx.2311.11450 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |