Near-infrared photodetection based on PbS colloidal quantum dots/organic hole conductor

Sang Hyuk Im; Jeong Ah Chang; Sung Woo Kim; Sang Wook Kim; Sang Il Seok

doi:10.1016/j.orgel.2009.12.021

Near-infrared photodetection based on PbS colloidal quantum dots/organic hole conductor

Sang Hyuk Im, Jeong Ah Chang, Sung Woo Kim, Sang Wook Kim, Sang Il Seok

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

30 Citations (Scopus)

Abstract

We have developed Near-infrared (NIR)-sensitive heterojunction cells consisting of n-type PbS colloidal quantum dots (CQDs) (low bandgap) anchored on the nanoporous TiO₂ (np-TiO₂, high-bandgap), and p-type spiro-OMeTAD (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene). In these cells, an n-type np-TiO₂ layer acts both as a host that chemically binds to the PbS CQDs and as an electron carrier. The number of PbS CQDs loaded onto the np-TiO₂ layer not only increases the external quantum efficiency (EQE) but also reduces the response time in the NIR region. The performance of these devices increased upon the introduction of a TiO_x layer between the PbS CQDs and spiro-OMeTAD followed by heat treatment at 110 °C for 1 min.

Original language	English
Pages (from-to)	696-699
Number of pages	4
Journal	Organic Electronics
Volume	11
Issue number	4
DOIs	https://doi.org/10.1016/j.orgel.2009.12.021
Publication status	Published - 2010 Apr
Externally published	Yes

Bibliographical note

Funding Information:
This study was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, and by the Global Research Laboratory (GRL) Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology, Republic of Korea.

Keywords

Near-infrared
Organic hole conductor
PbS colloidal quantum dots
Photodetection

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
General Chemistry
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

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10.1016/j.orgel.2009.12.021

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title = "Near-infrared photodetection based on PbS colloidal quantum dots/organic hole conductor",

abstract = "We have developed Near-infrared (NIR)-sensitive heterojunction cells consisting of n-type PbS colloidal quantum dots (CQDs) (low bandgap) anchored on the nanoporous TiO2 (np-TiO2, high-bandgap), and p-type spiro-OMeTAD (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene). In these cells, an n-type np-TiO2 layer acts both as a host that chemically binds to the PbS CQDs and as an electron carrier. The number of PbS CQDs loaded onto the np-TiO2 layer not only increases the external quantum efficiency (EQE) but also reduces the response time in the NIR region. The performance of these devices increased upon the introduction of a TiOx layer between the PbS CQDs and spiro-OMeTAD followed by heat treatment at 110 °C for 1 min.",

keywords = "Near-infrared, Organic hole conductor, PbS colloidal quantum dots, Photodetection",

author = "Im, {Sang Hyuk} and Chang, {Jeong Ah} and Kim, {Sung Woo} and Kim, {Sang Wook} and Seok, {Sang Il}",

note = "Funding Information: This study was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, and by the Global Research Laboratory (GRL) Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology, Republic of Korea.",

year = "2010",

month = apr,

doi = "10.1016/j.orgel.2009.12.021",

language = "English",

volume = "11",

pages = "696--699",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier",

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AU - Im, Sang Hyuk

AU - Chang, Jeong Ah

AU - Kim, Sung Woo

AU - Kim, Sang Wook

AU - Seok, Sang Il

N1 - Funding Information: This study was supported by a grant from the Fundamental R&D Program for Core Technology of Materials funded by the Ministry of Knowledge Economy, and by the Global Research Laboratory (GRL) Program through the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology, Republic of Korea.

PY - 2010/4

Y1 - 2010/4

N2 - We have developed Near-infrared (NIR)-sensitive heterojunction cells consisting of n-type PbS colloidal quantum dots (CQDs) (low bandgap) anchored on the nanoporous TiO2 (np-TiO2, high-bandgap), and p-type spiro-OMeTAD (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene). In these cells, an n-type np-TiO2 layer acts both as a host that chemically binds to the PbS CQDs and as an electron carrier. The number of PbS CQDs loaded onto the np-TiO2 layer not only increases the external quantum efficiency (EQE) but also reduces the response time in the NIR region. The performance of these devices increased upon the introduction of a TiOx layer between the PbS CQDs and spiro-OMeTAD followed by heat treatment at 110 °C for 1 min.

AB - We have developed Near-infrared (NIR)-sensitive heterojunction cells consisting of n-type PbS colloidal quantum dots (CQDs) (low bandgap) anchored on the nanoporous TiO2 (np-TiO2, high-bandgap), and p-type spiro-OMeTAD (2,2′,7,7′-tetrakis(N,N-di-p-methoxyphenylamine)-9,9′-spirobifluorene). In these cells, an n-type np-TiO2 layer acts both as a host that chemically binds to the PbS CQDs and as an electron carrier. The number of PbS CQDs loaded onto the np-TiO2 layer not only increases the external quantum efficiency (EQE) but also reduces the response time in the NIR region. The performance of these devices increased upon the introduction of a TiOx layer between the PbS CQDs and spiro-OMeTAD followed by heat treatment at 110 °C for 1 min.

KW - Near-infrared

KW - Organic hole conductor

KW - PbS colloidal quantum dots

KW - Photodetection

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DO - 10.1016/j.orgel.2009.12.021

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SN - 1566-1199

VL - 11

SP - 696

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JO - Organic Electronics

JF - Organic Electronics

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ER -

Near-infrared photodetection based on PbS colloidal quantum dots/organic hole conductor

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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