Transparent, Flexible Silicon Nanostructured Wire Networks with Seamless Junctions for High-Performance Photodetector Applications
| Autor: | Emmet D. Sheerin, John J. Boland, Mozakkar Hossain, Somobrata Acharya, S. N. Barimar Prabhava, K. D. M. Rao, David McCloskey, Gundam Sandeep Kumar |
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| Rok vydání: | 2018 |
| Předmět: |
Photocurrent
Materials science Silicon business.industry General Engineering General Physics and Astronomy Photodetector Silicon on insulator chemistry.chemical_element 02 engineering and technology Photodetection 010402 general chemistry 021001 nanoscience & nanotechnology Porous silicon 01 natural sciences 0104 chemical sciences Transparency (projection) Responsivity chemistry Optoelectronics General Materials Science 0210 nano-technology business |
| Zdroj: | ACS Nano. 12:4727-4735 |
| ISSN: | 1936-086X 1936-0851 |
| Popis: | Optically transparent photodetectors are crucial in next-generation optoelectronic applications including smart windows and transparent image sensors. Designing photodetectors with high transparency, photoresponsivity, and robust mechanical flexibility remains a significant challenge, as is managing the inevitable trade-off between high transparency and strong photoresponse. Here we report a scalable method to produce flexible crystalline Si nanostructured wire (NW) networks fabricated from silicon-on-insulator (SOI) with seamless junctions and highly responsive porous Si segments that combine to deliver exceptional performance. These networks show high transparency (∼92% at 550 nm), broadband photodetection (350 to 950 nm) with excellent responsivity (25 A/W), optical response time (0.58 ms), and mechanical flexibility (1000 cycles). Temperature-dependent photocurrent measurements indicate the presence of localized electronic states in the porous Si segments, which play a crucial role in light harvesting and photocarrier generation. The scalable low-cost approach based on SOI has the potential to deliver new classes of flexible optoelectronic devices, including next-generation photodetectors and solar cells. |
| Databáze: | OpenAIRE |
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