Cargando…

High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates

As a developing technology for flexible electronic device fabrication, ultra-violet (UV) photodetectors (PDs) based on a ZnO nanostructure are an effective approach for large-area integration of sensors on nonconventional substrates, such as plastic or paper. However, photoconductive ZnO nanorods gr...

Descripción completa

Detalles Bibliográficos
Autores principales: Ajmal, Hafiz Muhammad Salman, Khan, Fasihullah, Huda, Noor Ul, Lee, Sunjung, Nam, Kiyun, Kim, Hae Young, Eom, Tae-Hyong, Kim, Sam Dong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6722620/
https://www.ncbi.nlm.nih.gov/pubmed/31349615
http://dx.doi.org/10.3390/nano9081067
_version_ 1783448580267180032
author Ajmal, Hafiz Muhammad Salman
Khan, Fasihullah
Huda, Noor Ul
Lee, Sunjung
Nam, Kiyun
Kim, Hae Young
Eom, Tae-Hyong
Kim, Sam Dong
author_facet Ajmal, Hafiz Muhammad Salman
Khan, Fasihullah
Huda, Noor Ul
Lee, Sunjung
Nam, Kiyun
Kim, Hae Young
Eom, Tae-Hyong
Kim, Sam Dong
author_sort Ajmal, Hafiz Muhammad Salman
collection PubMed
description As a developing technology for flexible electronic device fabrication, ultra-violet (UV) photodetectors (PDs) based on a ZnO nanostructure are an effective approach for large-area integration of sensors on nonconventional substrates, such as plastic or paper. However, photoconductive ZnO nanorods grown on flexible substrates have slow responses or recovery as well as low spectral responsivity R because of the native defects and inferior crystallinity of hydrothermally grown ZnO nanorods at low temperatures. In this study, ZnO nanorod crystallites are doped with Cu or Ni/Cu when grown on polyethylene terephthalate (PET) substrates in an attempt to improve the performance of flexible PDs. The doping with Ni/Cu or Cu not only improves the crystalline quality but also significantly suppresses the density of deep-level emission defects in as-grown ZnO nanorods, as demonstrated by X-ray diffraction and photoluminescence. Furthermore, the X-ray photoelectron spectroscopy analysis shows that doping with the transition metals significantly increases the oxygen bonding with metal ions with enhanced O/Zn stoichiometry in as-grown nanorods. The fabricated flexible PD devices based on an interdigitated electrode structure demonstrates a very high R of ~123 A/W, a high on-off current ratio of ~130, and a significant improvement in transient response speed exhibiting rise and fall time of ~8 and ~3 s, respectively, by using the ZnO nanorods codoped by Ni/Cu.
format Online
Article
Text
id pubmed-6722620
institution National Center for Biotechnology Information
language English
publishDate 2019
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-67226202019-09-10 High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates Ajmal, Hafiz Muhammad Salman Khan, Fasihullah Huda, Noor Ul Lee, Sunjung Nam, Kiyun Kim, Hae Young Eom, Tae-Hyong Kim, Sam Dong Nanomaterials (Basel) Article As a developing technology for flexible electronic device fabrication, ultra-violet (UV) photodetectors (PDs) based on a ZnO nanostructure are an effective approach for large-area integration of sensors on nonconventional substrates, such as plastic or paper. However, photoconductive ZnO nanorods grown on flexible substrates have slow responses or recovery as well as low spectral responsivity R because of the native defects and inferior crystallinity of hydrothermally grown ZnO nanorods at low temperatures. In this study, ZnO nanorod crystallites are doped with Cu or Ni/Cu when grown on polyethylene terephthalate (PET) substrates in an attempt to improve the performance of flexible PDs. The doping with Ni/Cu or Cu not only improves the crystalline quality but also significantly suppresses the density of deep-level emission defects in as-grown ZnO nanorods, as demonstrated by X-ray diffraction and photoluminescence. Furthermore, the X-ray photoelectron spectroscopy analysis shows that doping with the transition metals significantly increases the oxygen bonding with metal ions with enhanced O/Zn stoichiometry in as-grown nanorods. The fabricated flexible PD devices based on an interdigitated electrode structure demonstrates a very high R of ~123 A/W, a high on-off current ratio of ~130, and a significant improvement in transient response speed exhibiting rise and fall time of ~8 and ~3 s, respectively, by using the ZnO nanorods codoped by Ni/Cu. MDPI 2019-07-25 /pmc/articles/PMC6722620/ /pubmed/31349615 http://dx.doi.org/10.3390/nano9081067 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ajmal, Hafiz Muhammad Salman
Khan, Fasihullah
Huda, Noor Ul
Lee, Sunjung
Nam, Kiyun
Kim, Hae Young
Eom, Tae-Hyong
Kim, Sam Dong
High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates
title High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates
title_full High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates
title_fullStr High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates
title_full_unstemmed High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates
title_short High-Performance Flexible Ultraviolet Photodetectors with Ni/Cu-Codoped ZnO Nanorods Grown on PET Substrates
title_sort high-performance flexible ultraviolet photodetectors with ni/cu-codoped zno nanorods grown on pet substrates
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6722620/
https://www.ncbi.nlm.nih.gov/pubmed/31349615
http://dx.doi.org/10.3390/nano9081067
work_keys_str_mv AT ajmalhafizmuhammadsalman highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT khanfasihullah highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT hudanoorul highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT leesunjung highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT namkiyun highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT kimhaeyoung highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT eomtaehyong highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates
AT kimsamdong highperformanceflexibleultravioletphotodetectorswithnicucodopedznonanorodsgrownonpetsubstrates