dc.citation.conferencePlace |
KO |
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dc.citation.title |
Asian Conference on Organic Electronics |
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dc.contributor.author |
Oh, Joon Hak |
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dc.contributor.author |
Yu, Hojeong |
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dc.contributor.author |
Bao, Zhenan |
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dc.date.accessioned |
2023-12-20T00:36:43Z |
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dc.date.available |
2023-12-20T00:36:43Z |
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dc.date.created |
2014-12-23 |
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dc.date.issued |
2013-11-14 |
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dc.description.abstract |
The photoelectronic characteristics of single-crystalline nanowire organic phototransistors (NW-OPTs) are studied using a high-performance n-channel organic semiconductor, N,N′-bis(2-phenylethyl)-perylene-3,4:9,10-tetracarboxylic diimide (BPE-PTCDI), as the photoactive layer. The optoelectronic performances of the NW-OPTs are analyzed by way of their current–voltage (I–V) characteristics on irradiation at different wavelengths, and comparison with corresponding thin-film organic phototransistors (OPTs). Significant enhancement in the charge-carrier mobility of NW-OPTs is observed upon light irradiation as compared with when performed in the dark. A mobility enhancement is observed when the incident optical power density increases and the wavelength of the light source matches the light-absorption range of the photoactive material. The photoswitching ratio is strongly dependent upon the incident optical power density, whereas the photoresponsivity is more dependent on matching the light-source wavelength with the maximum absorption range of the photoactive material. BPE-PTCDI NW-OPTs exhibit much higher external quantum efficiency (EQE) values (≈7900 times larger) than thin-film OPTs, with a maximum EQE of 263 000%. This is attributed to the intrinsically defect-free single-crystalline nature of the BPE-PTCDI NWs. In addition, an approach is devised to analyze the charge-transport behaviors using charge accumulation/release rates from deep traps under on/off switching of external light sources. |
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dc.identifier.bibliographicCitation |
Asian Conference on Organic Electronics |
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dc.identifier.uri |
https://scholarworks.unist.ac.kr/handle/201301/66679 |
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dc.publisher |
Asian Society for Organic Electronics |
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dc.title |
High-Performance Phototransistors Based on Single-Crystalline n-Channel Organic Nanowires and Photogenerated Charge-Carrier Behaviors |
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dc.type |
Conference Paper |
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dc.date.conferenceDate |
2013-11-14 |
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