2 research outputs found
Enhancing Photoinduced Charge Separation through Donor Moiety in Donor–Acceptor Organic Semiconductors
Three systems were designed, synthesized,
and characterized to
understand decay processes of photoinduced charge separation in organic
semiconductors that are imperative for efficient solar energy conversion.
A styrene-based indoline derivative (YD) was used as donor moiety
(D), a triazine derivative (TRC) as the first acceptor (A<sub>1</sub>), and 9,10-anthraquinone (AEAQ) as a second acceptor (A<sub>2</sub>) in constructing two systems, YD-TRC and YD-TRC-AEAQ. The lifetime
of the photoinduced charge-separated states in YD-TRC, a D–A<sub>1</sub> system, was found to be 215 ns and that in YD-TRC-AEAQ, a
D–A<sub>1</sub>–A<sub>2</sub> system, to be 1.14 μs, a 5-fold increase
with respect to that of the YD-TRC. These results show that YD is
a more effective donor in YD-TRC and YD-TRC-AEAQ systems at forming
long-lived charge-separated states compared to a previously reported
atriphenylamine derivative (MTPA) that generated charge-separated
states with a lifetime of 80 ns in MTPA-TRC and 650 ns in MTPA-TRC-AEAQ.
The third system was constructed using a metal-free porphyrin derivative
(MHTPP) to form a MHTPP-TRC-AEAQ structure, a D–L (linker)–A
system with a charge separation lifetime less than 10 ns. Therefore,
the D–A<sub>1</sub>–A<sub>2</sub> architecture is the
best at generating long-lived charge-separated states and thus is
a promising design strategy for organic photovoltaics materials
Enhancing Photoinduced Charge Separation through Donor Moiety in Donor–Acceptor Organic Semiconductors
Three systems were designed, synthesized,
and characterized to
understand decay processes of photoinduced charge separation in organic
semiconductors that are imperative for efficient solar energy conversion.
A styrene-based indoline derivative (YD) was used as donor moiety
(D), a triazine derivative (TRC) as the first acceptor (A<sub>1</sub>), and 9,10-anthraquinone (AEAQ) as a second acceptor (A<sub>2</sub>) in constructing two systems, YD-TRC and YD-TRC-AEAQ. The lifetime
of the photoinduced charge-separated states in YD-TRC, a D–A<sub>1</sub> system, was found to be 215 ns and that in YD-TRC-AEAQ, a
D–A<sub>1</sub>–A<sub>2</sub> system, to be 1.14 μs, a 5-fold increase
with respect to that of the YD-TRC. These results show that YD is
a more effective donor in YD-TRC and YD-TRC-AEAQ systems at forming
long-lived charge-separated states compared to a previously reported
atriphenylamine derivative (MTPA) that generated charge-separated
states with a lifetime of 80 ns in MTPA-TRC and 650 ns in MTPA-TRC-AEAQ.
The third system was constructed using a metal-free porphyrin derivative
(MHTPP) to form a MHTPP-TRC-AEAQ structure, a D–L (linker)–A
system with a charge separation lifetime less than 10 ns. Therefore,
the D–A<sub>1</sub>–A<sub>2</sub> architecture is the
best at generating long-lived charge-separated states and thus is
a promising design strategy for organic photovoltaics materials