TY - JOUR
T1 - High performance bulk-heterojunction organic solar cells fabricated with non-halogenated solvent processing
AU - Park, Choong Do
AU - Fleetham, Trever A.
AU - Li, Jian
AU - Vogt, Bryan D.
N1 - Funding Information:
We thank B. O’Brien and J. Torres for assistance with AFM measurements. We acknowledge financial support from the Army Research Laboratory through the Flexible Display Center at ASU under Cooperative Agreement W911NF-04-2-0005 . J. Li would like to acknowledge the partial support of the Advanced Photovoltaics Center, and the National Science Foundation ( CBET-0756148 ).
PY - 2011/9
Y1 - 2011/9
N2 - High efficiency bulk heterojunction (BHJ) organic solar cells based upon poly(3-hexylthiophene) (P3HT)-[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) are typically solution processed using halogenated solvents like dichlorobenzene (DCB). In this report, we tune the quality of solvent systems using more environmentally friendly, halogen-free solvents to mimic that of DCB based on Hansen solubility parameters (HSPs). A mixture of acetophenone (AP) and mesitylene (MS) can nearly match the HSPs for DCB. Solar cells fabricated using this solvent mixture can exhibit power conversion efficiency (PCE) comparable to that from DCB with a similar surface morphology. It is critical to control the drying process in the mixed solvent system due to significant volatility difference between AP and MS in order to achieve comparable morphology and PCE. This report illustrates a route to fabricate high efficiency BHJ solar cells from halogen-free solvent systems that could eliminate potential hurdles for manufacturing scale-up of organic BHJ solar cells.
AB - High efficiency bulk heterojunction (BHJ) organic solar cells based upon poly(3-hexylthiophene) (P3HT)-[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) are typically solution processed using halogenated solvents like dichlorobenzene (DCB). In this report, we tune the quality of solvent systems using more environmentally friendly, halogen-free solvents to mimic that of DCB based on Hansen solubility parameters (HSPs). A mixture of acetophenone (AP) and mesitylene (MS) can nearly match the HSPs for DCB. Solar cells fabricated using this solvent mixture can exhibit power conversion efficiency (PCE) comparable to that from DCB with a similar surface morphology. It is critical to control the drying process in the mixed solvent system due to significant volatility difference between AP and MS in order to achieve comparable morphology and PCE. This report illustrates a route to fabricate high efficiency BHJ solar cells from halogen-free solvent systems that could eliminate potential hurdles for manufacturing scale-up of organic BHJ solar cells.
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U2 - 10.1016/j.orgel.2011.05.020
DO - 10.1016/j.orgel.2011.05.020
M3 - Article
AN - SCOPUS:79959386951
VL - 12
SP - 1465
EP - 1470
JO - Organic Electronics: physics, materials, applications
JF - Organic Electronics: physics, materials, applications
SN - 1566-1199
IS - 9
ER -