Low dark current and improved detectivity of hybrid ultraviolet photodetector based on carbon-quantum-dots/zinc-oxide-nanorod composites

Sang Won Lee; Kyung Jae Choi; Byoung Ho Kang; Jae Sung Lee; Sae Wan Kim; Jin Beom Kwon; Sai Anand Gopalan; Jin Hyuk Bae; Eung Soo Kim; Dae Hyuk Kwon; Shin Won Kang

doi:10.1016/j.orgel.2016.10.003

Low dark current and improved detectivity of hybrid ultraviolet photodetector based on carbon-quantum-dots/zinc-oxide-nanorod composites

Sang Won Lee, Kyung Jae Choi, Byoung Ho Kang, Jae Sung Lee, Sae Wan Kim, Jin Beom Kwon, Sai Anand Gopalan, Jin Hyuk Bae, Eung Soo Kim, Dae Hyuk Kwon, Shin Won Kang

School of Electronics Engineering

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

In this study, we fabricated an ultraviolet (UV) photodetector by blending a hybrid photoactive layer (HPL) that is composed of a hybrid structure containing Carbon Quantum Dots (CQDs) and Zinc Oxide Nanorods (ZnO NRs). To observe the effective photo-inducing abilities of CQDs and ZnO NRs, we analyzed the electrical properties of a UV photodetector using an HPL of CQDs/ZnO NRs. Under an illumination of 365 nm UV light with an intensity of 1 mW/cm², the UV photodetector exhibited a high detectivity of 8.33 × 10¹² Jones, which is higher than that of a UV photodetector using a HPL of blended poly-n-vinylcarbazole (PVK) and ZnO NRs. Experimental results show that an HPL of blended CQDs/ZnO NRs can induce efficient charge extraction from CQDs and ZnO NRs. In addition, CQDs act as charge controllers that enable hole-electron separation in the device upon UV illumination. These results indicate that synthesized CQDs can substitute for a charge transport polymer (i.e., PVK) and that a UV photodetector using CQDs can exhibit high detectivity.

Original language	English
Pages (from-to)	250-257
Number of pages	8
Journal	Organic Electronics
Volume	39
DOIs	https://doi.org/10.1016/j.orgel.2016.10.003
State	Published - 1 Dec 2016

Keywords

Carbon Quantum Dots
Hybrid
UV photodetector
ZnO nanorods

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10.1016/j.orgel.2016.10.003

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title = "Low dark current and improved detectivity of hybrid ultraviolet photodetector based on carbon-quantum-dots/zinc-oxide-nanorod composites",

abstract = "In this study, we fabricated an ultraviolet (UV) photodetector by blending a hybrid photoactive layer (HPL) that is composed of a hybrid structure containing Carbon Quantum Dots (CQDs) and Zinc Oxide Nanorods (ZnO NRs). To observe the effective photo-inducing abilities of CQDs and ZnO NRs, we analyzed the electrical properties of a UV photodetector using an HPL of CQDs/ZnO NRs. Under an illumination of 365 nm UV light with an intensity of 1 mW/cm2, the UV photodetector exhibited a high detectivity of 8.33 × 1012 Jones, which is higher than that of a UV photodetector using a HPL of blended poly-n-vinylcarbazole (PVK) and ZnO NRs. Experimental results show that an HPL of blended CQDs/ZnO NRs can induce efficient charge extraction from CQDs and ZnO NRs. In addition, CQDs act as charge controllers that enable hole-electron separation in the device upon UV illumination. These results indicate that synthesized CQDs can substitute for a charge transport polymer (i.e., PVK) and that a UV photodetector using CQDs can exhibit high detectivity.",

keywords = "Carbon Quantum Dots, Hybrid, UV photodetector, ZnO nanorods",

author = "Lee, {Sang Won} and Choi, {Kyung Jae} and Kang, {Byoung Ho} and Lee, {Jae Sung} and Kim, {Sae Wan} and Kwon, {Jin Beom} and Gopalan, {Sai Anand} and Bae, {Jin Hyuk} and Kim, {Eung Soo} and Kwon, {Dae Hyuk} and Kang, {Shin Won}",

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doi = "10.1016/j.orgel.2016.10.003",

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T1 - Low dark current and improved detectivity of hybrid ultraviolet photodetector based on carbon-quantum-dots/zinc-oxide-nanorod composites

AU - Lee, Sang Won

AU - Choi, Kyung Jae

AU - Kang, Byoung Ho

AU - Lee, Jae Sung

AU - Kim, Sae Wan

AU - Kwon, Jin Beom

AU - Gopalan, Sai Anand

AU - Bae, Jin Hyuk

AU - Kim, Eung Soo

AU - Kwon, Dae Hyuk

AU - Kang, Shin Won

PY - 2016/12/1

Y1 - 2016/12/1

N2 - In this study, we fabricated an ultraviolet (UV) photodetector by blending a hybrid photoactive layer (HPL) that is composed of a hybrid structure containing Carbon Quantum Dots (CQDs) and Zinc Oxide Nanorods (ZnO NRs). To observe the effective photo-inducing abilities of CQDs and ZnO NRs, we analyzed the electrical properties of a UV photodetector using an HPL of CQDs/ZnO NRs. Under an illumination of 365 nm UV light with an intensity of 1 mW/cm2, the UV photodetector exhibited a high detectivity of 8.33 × 1012 Jones, which is higher than that of a UV photodetector using a HPL of blended poly-n-vinylcarbazole (PVK) and ZnO NRs. Experimental results show that an HPL of blended CQDs/ZnO NRs can induce efficient charge extraction from CQDs and ZnO NRs. In addition, CQDs act as charge controllers that enable hole-electron separation in the device upon UV illumination. These results indicate that synthesized CQDs can substitute for a charge transport polymer (i.e., PVK) and that a UV photodetector using CQDs can exhibit high detectivity.

AB - In this study, we fabricated an ultraviolet (UV) photodetector by blending a hybrid photoactive layer (HPL) that is composed of a hybrid structure containing Carbon Quantum Dots (CQDs) and Zinc Oxide Nanorods (ZnO NRs). To observe the effective photo-inducing abilities of CQDs and ZnO NRs, we analyzed the electrical properties of a UV photodetector using an HPL of CQDs/ZnO NRs. Under an illumination of 365 nm UV light with an intensity of 1 mW/cm2, the UV photodetector exhibited a high detectivity of 8.33 × 1012 Jones, which is higher than that of a UV photodetector using a HPL of blended poly-n-vinylcarbazole (PVK) and ZnO NRs. Experimental results show that an HPL of blended CQDs/ZnO NRs can induce efficient charge extraction from CQDs and ZnO NRs. In addition, CQDs act as charge controllers that enable hole-electron separation in the device upon UV illumination. These results indicate that synthesized CQDs can substitute for a charge transport polymer (i.e., PVK) and that a UV photodetector using CQDs can exhibit high detectivity.

KW - Carbon Quantum Dots

KW - Hybrid

KW - UV photodetector

KW - ZnO nanorods

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JO - Organic Electronics

JF - Organic Electronics

ER -

Low dark current and improved detectivity of hybrid ultraviolet photodetector based on carbon-quantum-dots/zinc-oxide-nanorod composites

Abstract

Keywords

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