Translucent Photodetector with Blended Nanowires-Metal Oxide Transparent Selective Electrode Utilizing Photovoltaic and Pyro-Phototronic Coupling Effect
- 주제(키워드) pyro-phototronic , self-biased , silver nanowires , transparent , ultra-violet (UV) photodetectors
- 주제(기타) Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter
- 설명문(일반) [Abbas, Sohail; Kumar, Mohit; Kim, Joondong] Incheon Natl Univ, Dept Elect Engn, 119 Acad Rd, Incheon 22012, South Korea; [Abbas, Sohail; Kumar, Mohit; Kim, Joondong] Incheon Natl Univ, MCIFE, PEDAL, 119 Acad Rd, Incheon 22012, South Korea; [Kim, Dong-Wook] Ewha Womans Univ, Dept Phys, 52 Ewhayeodae Gil, Seoul 03760, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 WILEY-V C H VERLAG GMBH
- 발행년도 2019
- URI http://www.dcollection.net/handler/ewha/000000160094
- 본문언어 영어
- Published As http://dx.doi.org/10.1002/smll.201804346
- PubMed https://pubmed.ncbi.nlm.nih.gov/30721568
초록/요약
ZnO is a potential candidate for photodetection utilizing the pyroelectric effect. Here, a self-biased and translucent photodetector with the configuration of Cu4O3/ZnO/FTO/Glass is designed and fabricated. In addition, the pyroelectric effect is effectively harvested using indium tin oxide (ITO), silver nanowires (AgNWs), and a blend of AgNWs-coated ITO as the transparent selective contact electrode. The improved rise times are observed from 1400 mu s (bare condition; without the selective electrode) to 69, 60, 7 mu s, and fall times from 720 mu s (bare condition) to 80, 70, 10 mu s for corresponding ITO, AgNWs, and AgNWs-coated ITO contact electrodes, respectively. Similarly, the responsivity and detectivity are enhanced by about 4.39 x 10(7) and 5.27 x 10(5)%, respectively. An energy band diagram is proposed to explain the underlying working mechanism based on the workfunction of the ITO (4.7 eV) and AgNWs (4.57 eV) as measured by Kelvin probe force microscopy, which confirms the formation of type-II band alignment resulting in the efficient transport of photogenerated charge carriers. The functional use of the transparent selective contact electrode can effectively harness the pyro-phototronic effect for next-generation transparent and flexible optoelectronic applications.
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