In this section
@article{Tsoi:2013:10.1063/1.4803912,
author = {Tsoi, WC and Zhang, W and Hollis, JR and Suh, M and Heeney, M and McCulloch, I and Kim, J-S},
doi = {10.1063/1.4803912},
journal = {Applied Physics Letters},
title = {In-situ monitoring of molecular vibrations of two organic semiconductors in photovoltaic blends and their impact on thin film morphology},
url = {http://dx.doi.org/10.1063/1.4803912},
volume = {102},
year = {2013}
}
TY - JOUR
AB - We report in-situ simultaneous monitoring of molecular vibrations of two components in organic photovoltaic blends using resonant Raman spectroscopy. Blend films were composed of a low bandgap copolymer thieno[3,2-b]thiophene-diketopyrrolopyrrole (DPPTTT) and (6,6)-phenyl-C71-butyric acid ester (PC 70BM). Changes in Raman spectra associated with crystallization processes of each component and their impact on thin film morphology were studied during thermal annealing and cooling processes. Transition temperatures to crystalline phases in blends were measured at ∼150 °C and ∼170 °C for DPPTTT and PC 70BM, respectively. Such phase changes lead to modifications in local chemical composition reducing relative Raman peak intensities (IPC70BM/IDPPTTT) from ∼0.4 in PC 70BM-rich domains to ∼0.15 in homogeneous areas.
AU - Tsoi,WC
AU - Zhang,W
AU - Hollis,JR
AU - Suh,M
AU - Heeney,M
AU - McCulloch,I
AU - Kim,J-S
DO - 10.1063/1.4803912
PY - 2013///
SN - 1077-3118
TI - In-situ monitoring of molecular vibrations of two organic semiconductors in photovoltaic blends and their impact on thin film morphology
T2 - Applied Physics Letters
UR - http://dx.doi.org/10.1063/1.4803912
UR - http://hdl.handle.net/10044/1/41247
VL - 102
ER -