370 citations · 736 across the 9 of their papers we have counts for
8 papers
Novel primary photoexcitations in -conjugated donor-acceptor copolymers probed by transient magneto-photoinduced-absorption
Uyen N. V. Huynh, Tek P. Basel, L. Dou +6
The saga of the primary photoexcitations in -conjugated polymers has been a source of extraordinary scientific curiosity that has lasted for more than three decades. From solito…
Negative capacitance in organic semiconductor devices: bipolar injection and charge recombination mechanism
E. Ehrenfreund, C. Lungenschmied, G. Dennler +2
We report negative capacitance at low frequencies in organic semiconductor based diodes and show that it appears only under bipolar injection conditions. We account quantitatively…
Metastable polaron supporting phase in poly-p-phenylene films induced by UV illumination
T. Drori, E. Gershman, C. X. Sheng +3
We discovered a new metastable polaron-supporting phase in pristine films of a soluble derivative of poly-p-phenylene vinylene (MEH-PPV) that is induced by UV illumination. In the…
Comment on Frequency response and origin of the spin-1/2 photolumines-cence-detected magnetic resonance in a pi-conjugated polymer
C. G. Yang, E. Ehrenfreund, Z. V. Vardeny
In a recent paper Segal et al. [1] attempted to explain the dynamics of spin 1/2 photoluminescence detected magnetic resonance (PLDMR) in films of a pi-conjugated polymer, namely a…
Apparent phonon side band modes in pi-conjugated systems: polymers, oligomers and crystals
E. Ehrenfreund, C. C. Wu, Z. V. Vardeny
The emission spectra of many pi-conjugated polymers and oligomers contain side-band replicas with apparent frequencies that do not match the Raman active mode frequencies. Using a…
Apparent vibrational side-bands in pi-conjugated systems: the case of distyrylbenzene
C. C. Wu, E. Ehrenfreund, J. J. Gutierrez +2
The photoluminescence (PL) spectra of dilute solution and single crystals of distyrylbenzene show unique temperature dependent vibronic structures. The characteristic single freque…