TY - JOUR
T1 - Studies of the optimization of recombination layers for inverted tandem polymer solar cells
AU - Shim, Jae Won
AU - Zhou, Yinhua
AU - Fuentes-Hernandez, Canek
AU - Dindar, Amir
AU - Guan, Zelei
AU - Cheun, Hyeunseok
AU - Kahn, Antoine
AU - Kippelen, Bernard
N1 - Funding Information:
This material was funded in part through the Center for Interface Science: Solar Electric Materials, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under Award Number DE-SC0001084 (J.W.S., Y.Z., Z.G., H.C., A.K.), by the STC Program of the National Science Foundation under Agreement no. DMR-0120967 (C.F.H., A.D.), by the Office of Naval Research (Grant no. N00014-1-1-0313 ; B.K.).
PY - 2012/12
Y1 - 2012/12
N2 - We report on an optimization study of recombination layers in inverted tandem bulk heterojunction polymeric solar cells. Modification of bilayers of MoO x/Ag with a polymeric surface modifier, polyethylenimine ethoxylated (PEIE), is found to significantly improve the performance of these recombination layers. The improvement is assigned to a significant reduction by 1.5 eV of the work function of the Ag with PEIE. An analysis of the electrical, optical, and surface properties of the recombination trilayer is presented. Inverted tandem polymer solar cells, fabricated with two identical active layers comprising a donor polymer poly(3-hexylthiophene) (P3HT), and a fullerene derivative acceptor, [6,6]-phenyl C 61 butyric acid methyl ester (PC 60BM), provide a proof-of-principle demonstration of the effectiveness of the MoO x/Ag/PEIE trilayer as recombination layer. Such tandem cells yield an open-circuit voltage of 1042 mV and fill factors of 0.62, comparable to those of single cells (0.63) under simulated AM 1.5G, 100 mW/cm 2 illumination. Preliminary shelf lifetime studies suggest that these trilayer recombination layers show good air stability.
AB - We report on an optimization study of recombination layers in inverted tandem bulk heterojunction polymeric solar cells. Modification of bilayers of MoO x/Ag with a polymeric surface modifier, polyethylenimine ethoxylated (PEIE), is found to significantly improve the performance of these recombination layers. The improvement is assigned to a significant reduction by 1.5 eV of the work function of the Ag with PEIE. An analysis of the electrical, optical, and surface properties of the recombination trilayer is presented. Inverted tandem polymer solar cells, fabricated with two identical active layers comprising a donor polymer poly(3-hexylthiophene) (P3HT), and a fullerene derivative acceptor, [6,6]-phenyl C 61 butyric acid methyl ester (PC 60BM), provide a proof-of-principle demonstration of the effectiveness of the MoO x/Ag/PEIE trilayer as recombination layer. Such tandem cells yield an open-circuit voltage of 1042 mV and fill factors of 0.62, comparable to those of single cells (0.63) under simulated AM 1.5G, 100 mW/cm 2 illumination. Preliminary shelf lifetime studies suggest that these trilayer recombination layers show good air stability.
KW - Inverted structure
KW - Polyethylenimine ethoxylated
KW - Polymer tandem solar cells
KW - Recombination layer
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U2 - 10.1016/j.solmat.2012.08.004
DO - 10.1016/j.solmat.2012.08.004
M3 - Article
AN - SCOPUS:84865510000
SN - 0927-0248
VL - 107
SP - 51
EP - 55
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
ER -