Energy

Key metrologies/systems: Scanning tunneling microscopy and one- and two-photon photoemission/Model organic heterostructures - pentacene:C60 and metal phthalocyanine:C60. Advanced platforms and protocols are being developed towards innovative metrologies to fully characterize the charge transfer dynamics of next-generation organic photovoltaic systems.

Electronic Structure and Excited-State Dynamics at Donor-Acceptor Interfaces
Organic photovoltaic cells rely upon molecular interfaces to separate charge. Efficient charge separation depends molecular structure and electronic band alignment across donor-acceptor interfaces. Correlation of molecular structure determined with scanning tunneling microscopy and interfacial electronic structure measured with one- and two-photon photoemission techniques allows determination of the factors that control the efficacy of charge separation.
Link to additional details.

 

Associated Publications:

“Variable temperature scanning tunneling microscopy of pentacene monolayer and bilayer phases on Ag(111)”, D.B. Dougherty , W. Jin, W.G. Cullen, J.E. Reutt-Robey, and S.W. Robey, submitted to Journal of Physical Chemistry C

“Striped Domains at the Pentacene:C60 Interface”, D.B. Dougherty, W. Jin, W.G. Cullen, J.E. Reutt-Robey, and S.W. Robey, submitted to Applied Physics letters
 
“Titanyl phthalocyanine phase selection on Ag (111)”, Y. Wei, S.W. Robey, and J.E. Reutt-Robey, submitted to Journal of Physical Chemistry