Nanowire encapsulation with polymer for electrical isolation and enhanced optical properties

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Nanowire encapsulation with polymer for electrical isolation and enhanced optical properties. / Haggren, Tuomas; Shah, Syed; Autere, Anton; Kakko, Joona Pekko; Dhaka, Veer; Kim, Maria; Huhtio, Teppo; Sun, Zhipei; Lipsanen, Harri.

In: Nano Research, Vol. 10, No. 8, 08.2017, p. 2657-2666.

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@article{b43a64b0871b42f58653aa963329f5a8,
title = "Nanowire encapsulation with polymer for electrical isolation and enhanced optical properties",
abstract = "Light management and electrical isolation are essential for the majority of optoelectronic nanowire (NW) devices. Here, we present a cost-effective technique, based on vapor-phase deposition of parylene-C and subsequent annealing, that provides conformal encapsulation, anti-reflective coating, improved optical properties, and electrical insulation for GaAs nanowires. The process presented allows facile encapsulation and insulation that is suitable for any nanowire structure. In particular, the parylene-C encapsulation functions as an efficient antireflection coating for the nanowires, with reflectivity down to <1{\%} in the visible spectrum. Furthermore, the parylene-C coating increases photoluminescence intensity, suggesting improved light guiding to the NWs. Finally, based on this process, a NW LED was fabricated, which showed good diode performance and a clear electroluminescence signal. We believe the process can expand the fabrication possibilities and improve the performance of optoelectronic nanowire devices.[Figure not available: see fulltext.]",
keywords = "annealing, antireflection, GaAs, light emitting diode (LED), metallo-organic vapor phase epitaxy (MOVPE), parylene-C",
author = "Tuomas Haggren and Syed Shah and Anton Autere and Kakko, {Joona Pekko} and Veer Dhaka and Maria Kim and Teppo Huhtio and Zhipei Sun and Harri Lipsanen",
year = "2017",
month = "8",
doi = "10.1007/s12274-017-1468-8",
language = "English",
volume = "10",
pages = "2657--2666",
journal = "Nano Research",
issn = "1998-0124",
publisher = "Press of Tsinghua University",
number = "8",

}

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TY - JOUR

T1 - Nanowire encapsulation with polymer for electrical isolation and enhanced optical properties

AU - Haggren, Tuomas

AU - Shah, Syed

AU - Autere, Anton

AU - Kakko, Joona Pekko

AU - Dhaka, Veer

AU - Kim, Maria

AU - Huhtio, Teppo

AU - Sun, Zhipei

AU - Lipsanen, Harri

PY - 2017/8

Y1 - 2017/8

N2 - Light management and electrical isolation are essential for the majority of optoelectronic nanowire (NW) devices. Here, we present a cost-effective technique, based on vapor-phase deposition of parylene-C and subsequent annealing, that provides conformal encapsulation, anti-reflective coating, improved optical properties, and electrical insulation for GaAs nanowires. The process presented allows facile encapsulation and insulation that is suitable for any nanowire structure. In particular, the parylene-C encapsulation functions as an efficient antireflection coating for the nanowires, with reflectivity down to <1% in the visible spectrum. Furthermore, the parylene-C coating increases photoluminescence intensity, suggesting improved light guiding to the NWs. Finally, based on this process, a NW LED was fabricated, which showed good diode performance and a clear electroluminescence signal. We believe the process can expand the fabrication possibilities and improve the performance of optoelectronic nanowire devices.[Figure not available: see fulltext.]

AB - Light management and electrical isolation are essential for the majority of optoelectronic nanowire (NW) devices. Here, we present a cost-effective technique, based on vapor-phase deposition of parylene-C and subsequent annealing, that provides conformal encapsulation, anti-reflective coating, improved optical properties, and electrical insulation for GaAs nanowires. The process presented allows facile encapsulation and insulation that is suitable for any nanowire structure. In particular, the parylene-C encapsulation functions as an efficient antireflection coating for the nanowires, with reflectivity down to <1% in the visible spectrum. Furthermore, the parylene-C coating increases photoluminescence intensity, suggesting improved light guiding to the NWs. Finally, based on this process, a NW LED was fabricated, which showed good diode performance and a clear electroluminescence signal. We believe the process can expand the fabrication possibilities and improve the performance of optoelectronic nanowire devices.[Figure not available: see fulltext.]

KW - annealing

KW - antireflection

KW - GaAs

KW - light emitting diode (LED)

KW - metallo-organic vapor phase epitaxy (MOVPE)

KW - parylene-C

UR - http://www.scopus.com/inward/record.url?scp=85015166543&partnerID=8YFLogxK

U2 - 10.1007/s12274-017-1468-8

DO - 10.1007/s12274-017-1468-8

M3 - Article

VL - 10

SP - 2657

EP - 2666

JO - Nano Research

JF - Nano Research

SN - 1998-0124

IS - 8

ER -

ID: 11425433