Circularly Polarized Light-Induced Microwave Conductivity Measurement: Rapid Screening Technique of Electronic Conductivity in Chiral Molecular Materials
- Kyoto University (Japan)
- Kyoto University (Japan); JST-PRESTO, Kawaguchi (Japan)
- Tokyo Metropolitan University (Japan)
- Hokkaido University, Sapporo (Japan)
- Tokyo Metropolitan University (Japan); JST-PRESTO, Kawaguchi (Japan)
- Inst. of Physical and Chemical Research (RIKEN), Wako (Japan)
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Kyoto University (Japan); JST-CREST, Kawaguchi (Japan)
Here, we developed circularly polarized light-time-resolved microwave conductivity (CPL-TRMC) for investigation of the CPL-dependent photoinduced charge carrier dynamics in chiral materials with chiroptical properties. Chiral R- or S-perylenediimide (PDI) molecular thin films were paired with handedness-sorted (6,5) and (11,-5) single-walled carbon nanotube (SWCNT) films to compose a donor (D)-acceptor (A) system for the spin-dependent charge separation process, and the D-A system was examined through linear and circular polarization-dependent steady-state and time-resolved measurements. The R-PDI-(6,5) film exhibited strong enhancement in circular dichroism (CD) and revealed a reversed transient conductivity signal, relative to the polarity of CD in CPL-TRMC measurement upon excitation of the E11 state, which is interpreted as arising from a spin-dependent initial charge separation process. Through linear polarization-dependent flash photolysis TRMC and circular polarization-resolved femtosecond transient absorption, we could deduce that sub-picosecond intertubular charge separation upon E11 excitation in SWCNT was responsible for the spin-dependent photoconductivity transients observed in CPL-TRMC measurements.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); Core Research for Evolutional Science and Technology; Precursory Research for Embryonic Science and Technology; Japan Society for the Promotion of Science (JSPS) KAKENHI; Japan Science and Technology Agency (JST); Fusion Oriented REsearch for disruptive Science and Technology
- Grant/Contract Number:
- AC36-08GO28308
- OSTI ID:
- 2558952
- Report Number(s):
- NREL/JA--5900-93170
- Journal Information:
- Journal of Physical Chemistry Letters, Journal Name: Journal of Physical Chemistry Letters Journal Issue: 13 Vol. 16; ISSN 1948-7185
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English