TY - JOUR
T1 - Exploring morphology effects on the performance of isoindigo based bulk heterojunction photovoltaic devices
AU - Graham, Kenneth R.
AU - Mei, Jianguo
AU - Stalder, Romain
AU - Reynolds, John R.
PY - 2010
Y1 - 2010
N2 - An electron acceptor, isoindigo, has been integrated into donor-acceptor based oligomers for application in bulk heterojunction photovoltaic devices. The donor-acceptor oligomers utilize isoindigo as the electron acceptor and thiophene units as the electron donors. These oligomers show broad absorbance extending past 700 nm in the solid state and appropriate HOMO-LUMO levels for electron transfer to PCBM. Non-optimized devices based on the bithiophene-isoindigo-bithiophene oligomer:PC60BM blends display power conversion efficiencies up to 1.76%, VOC of 0.74 V, JSC of 6.3 mA/cm2, and a fill factor of 0.38. The morphologies of devices based on differing thiophene-isoindigo oligomers blended with PCBM were probed through AFM and TEM. The efficiencies of the devices are partly attributed to the varying morphologies. Additionally, AFM images of the top surfaces (Al side) of the blend films differed significantly from the TEM images and the AFM images of the bottom surfaces (PEDOT:PSS interface) of the blend films.
AB - An electron acceptor, isoindigo, has been integrated into donor-acceptor based oligomers for application in bulk heterojunction photovoltaic devices. The donor-acceptor oligomers utilize isoindigo as the electron acceptor and thiophene units as the electron donors. These oligomers show broad absorbance extending past 700 nm in the solid state and appropriate HOMO-LUMO levels for electron transfer to PCBM. Non-optimized devices based on the bithiophene-isoindigo-bithiophene oligomer:PC60BM blends display power conversion efficiencies up to 1.76%, VOC of 0.74 V, JSC of 6.3 mA/cm2, and a fill factor of 0.38. The morphologies of devices based on differing thiophene-isoindigo oligomers blended with PCBM were probed through AFM and TEM. The efficiencies of the devices are partly attributed to the varying morphologies. Additionally, AFM images of the top surfaces (Al side) of the blend films differed significantly from the TEM images and the AFM images of the bottom surfaces (PEDOT:PSS interface) of the blend films.
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M3 - Conference article
AN - SCOPUS:79951533963
SN - 0065-7727
JO - ACS National Meeting Book of Abstracts
JF - ACS National Meeting Book of Abstracts
T2 - 239th ACS National Meeting and Exposition
Y2 - 21 March 2010 through 25 March 2010
ER -
