TY - JOUR
T1 - Molecular doping of near-infrared organic photodetectors for photoplethysmogram sensors
AU - Wang, Binghao
AU - Scaccabarozzi, Alberto D.
AU - Wang, Haoyang
AU - Koizumi, Mari
AU - Nugraha, Mohamad Insan
AU - Lin, Yuanbao
AU - Firdaus, Yuliar
AU - Wang, Yan
AU - Lee, Sunghoon
AU - Yokota, Tomoyuki
AU - Anthopoulos, Thomas D.
AU - Someya, Takao
N1 - KAUST Repository Item: Exported on 2021-03-22
Acknowledgements: This work was financially supported by a collaborative research program (OSR#4196) between the University of Tokyo (UTokyo) and King Abdullah University of Science and Technology (KAUST) and Japan Science and Technology Agency (JST) ACCEL (grant no. JPMJMI17F1). We thank Dr Sixing Xiong (Riken, Japan) for the helpful discussion.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.
PY - 2021
Y1 - 2021
N2 - Doping is a common strategy in the field of semiconductor technology but its employment in organic photodetectors (OPDs) has been limited due to the typical uncontrollable increase of the dark currents. This study introduces three different molecular dopants, including p-type tris(pentafluorophenyl)borane, n-type benzyl viologen, and (4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)-phenyl)dimethylamine, for near-infrared poly[[2,5-bis(2-hexyldecyl)-2,3,5,6-tetrahydro-3,6-dioxopyrrolo[3,4-c]pyrrole-1,4-diyl]-alt-[3′,3′′-dimethyl-2,2′:5′,2′′-terthiophene]-5,5′′-diyl]:[6,6]-phenyl C61butyric acid methyl ester (PMDPP3T:PC61BM) bulk-heterojunction OPDs. The results show that OPDs with optimal 0.02 wt% dopants exhibit low dark current (3.18 × 10−8A cm−2), high detectivity (5.56 × 1012Jones), and good environmental stability for ∼2 months. These doped OPDs are further used for pulse wave monitoring, which exhibit stable waveforms and can distinguish slow and fast heartbeat rates.
AB - Doping is a common strategy in the field of semiconductor technology but its employment in organic photodetectors (OPDs) has been limited due to the typical uncontrollable increase of the dark currents. This study introduces three different molecular dopants, including p-type tris(pentafluorophenyl)borane, n-type benzyl viologen, and (4-(1,3-dimethyl-2,3-dihydro-1H-benzoimidazol-2-yl)-phenyl)dimethylamine, for near-infrared poly[[2,5-bis(2-hexyldecyl)-2,3,5,6-tetrahydro-3,6-dioxopyrrolo[3,4-c]pyrrole-1,4-diyl]-alt-[3′,3′′-dimethyl-2,2′:5′,2′′-terthiophene]-5,5′′-diyl]:[6,6]-phenyl C61butyric acid methyl ester (PMDPP3T:PC61BM) bulk-heterojunction OPDs. The results show that OPDs with optimal 0.02 wt% dopants exhibit low dark current (3.18 × 10−8A cm−2), high detectivity (5.56 × 1012Jones), and good environmental stability for ∼2 months. These doped OPDs are further used for pulse wave monitoring, which exhibit stable waveforms and can distinguish slow and fast heartbeat rates.
UR - http://hdl.handle.net/10754/668143
UR - http://xlink.rsc.org/?DOI=D0TC05549B
UR - http://www.scopus.com/inward/record.url?scp=85102366531&partnerID=8YFLogxK
U2 - 10.1039/d0tc05549b
DO - 10.1039/d0tc05549b
M3 - Article
SN - 2050-7526
VL - 9
SP - 3129
EP - 3135
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 9
ER -