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 - Publisher Copyright:
© The Royal Society of Chemistry 2021.
PY - 2021/3/7
Y1 - 2021/3/7
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://www.scopus.com/inward/record.url?scp=85102366531&partnerID=8YFLogxK
U2 - 10.1039/d0tc05549b
DO - 10.1039/d0tc05549b
M3 - 文章
AN - SCOPUS:85102366531
SN - 2050-7534
VL - 9
SP - 3129
EP - 3135
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 9
ER -