TY - JOUR
T1 - Snow cleaning of substrates increases yield of large-area organic photovoltaics
AU - Wang, Nana
AU - Zimmerman, Jeramy D.
AU - Tong, Xiaoran
AU - Xiao, Xin
AU - Yu, Junsheng
AU - Forrest, Stephen R.
PY - 2012/9/24
Y1 - 2012/9/24
N2 - We demonstrate large-area organic photovoltaic cells (OPVs) based on boron-subphthalocyanine chloride (SubPc)/C60 and 2,4-bis[4-(N,N- diphenylamino)-2,6 dihydroxyphenyl]squaraine/C60 heterojunctions on substrates "snow-cleaned" with a jet of mixed-phase CO2. Snow cleaning reduces particulates on the indium-tin-oxide (ITO)-coated glass substrates, thereby reducing device shorts and shunt paths. Snow cleaning improves yield of 1.44 cm2 SubPc/C60 OPV cells from zero for conventionally solvent-cleaned substrates to ∼70%. The standard deviation of power conversion efficiency for a population of 19 snow-cleaned devices is ≤4.0%. By using a sub-electrode structure, we obtain a power conversion efficiency of 2.21%±0.05% for 6.25cm2 SubPc/C 60 devices, compared to 2.69%±0.03%, for 0.008cm2 devices, with the efficiency decrease due to series resistance of the ITO.
AB - We demonstrate large-area organic photovoltaic cells (OPVs) based on boron-subphthalocyanine chloride (SubPc)/C60 and 2,4-bis[4-(N,N- diphenylamino)-2,6 dihydroxyphenyl]squaraine/C60 heterojunctions on substrates "snow-cleaned" with a jet of mixed-phase CO2. Snow cleaning reduces particulates on the indium-tin-oxide (ITO)-coated glass substrates, thereby reducing device shorts and shunt paths. Snow cleaning improves yield of 1.44 cm2 SubPc/C60 OPV cells from zero for conventionally solvent-cleaned substrates to ∼70%. The standard deviation of power conversion efficiency for a population of 19 snow-cleaned devices is ≤4.0%. By using a sub-electrode structure, we obtain a power conversion efficiency of 2.21%±0.05% for 6.25cm2 SubPc/C 60 devices, compared to 2.69%±0.03%, for 0.008cm2 devices, with the efficiency decrease due to series resistance of the ITO.
UR - http://www.scopus.com/inward/record.url?scp=84883542205&partnerID=8YFLogxK
U2 - 10.1063/1.4754690
DO - 10.1063/1.4754690
M3 - 文章
AN - SCOPUS:84883542205
SN - 0003-6951
VL - 101
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 13
M1 - 133901
ER -