TY - JOUR
T1 - Near-infrared photodetection based on PbS colloidal quantum dots/organic hole conductor
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
UR - http://www.scopus.com/inward/record.url?scp=77549086684&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2009.12.021
DO - 10.1016/j.orgel.2009.12.021
M3 - Article
AN - SCOPUS:77549086684
SN - 1566-1199
VL - 11
SP - 696
EP - 699
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
IS - 4
ER -