High-Performance UV–Vis–NIR Phototransistors Based on Single-Crystalline Organic Semiconductor–Gold Hybrid Nanomaterials
- 주제(키워드) gold nanorods , hybrid nanomaterials , organic nanowires , organic semiconductors , phototransistors
- 등재 SCIE, SCOPUS
- 발행기관 Wiley-VCH Verlag
- 발행년도 2017
- 총서유형 Journal
- URI http://www.dcollection.net/handler/ewha/000000141735
- 본문언어 영어
- Published As http://dx.doi.org/10.1002/adfm.201604528
- 저작권 이화여자대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Hybrid materials in optoelectronic devices can generate new functionality or provide synergistic effects that enhance the properties of each component. Here, high-performance phototransistors with broad spectral responsivity in UV–vis–near-infrared (NIR) regions, using gold nanorods (Au NRs)-decorated n-type organic semiconductor and N,N′-bis(2-phenylethyl)-perylene-3,4:9,10-tetracarboxylic diimide (BPE-PTCDI) nanowires (NWs) are reported. By way of the synergistic effect of the excellent photo-conducting characteristics of single-crystalline BPE-PTCDI NW and the light scattering and localized surface plasmon resonances (LSPR) of Au NRs, the hybrid system provides new photo-detectivity in the NIR spectral region. In the UV–vis region, hybrid nanomaterial-based phototransistors exhibit significantly enhanced photo-responsive properties with a photo-responsivity (R) of 7.70 × 105 A W−1 and external quantum efficiency (EQE) of 1.42 × 108% at the minimum light intensity of 2.5 µW cm−2, which are at least tenfold greater than those of pristine BPE-PTCDI NW-based ones and comparable to those of high-performance inorganic material-based devices. While a pristine BPE-PTCDI NW-based photodetector is insensitive to the NIR spectral region, the hybrid NW-based phototransistor shows an R of 10.7 A W−1 and EQE of 1.35 × 103% under 980 nm wavelength-NIR illumination. This work demonstrates a viable approach to high-performance photo-detecting systems with broad spectral responsivity. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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