TY - JOUR
T1 - Design of efficient organic tandem cells: On the interplay between molecular absorption and layer sequence
AU - Dennler, G.
AU - Forberich, K.
AU - Ameri, T.
AU - Waldauf, C.
AU - Denk, P.
AU - Brabec, C.J.
AU - Hingerl, K.
AU - Heeger, A.J.
N1 - cited By 104
PY - 2007
Y1 - 2007
N2 - We have carried out detailed optical simulations of tandem solar cells based on the following organic semiconductors: poly(3-hexylthiophene) (P3HT), poly[2,6-(4,4-bis-(2-ethylhexyl)-4H- cyclopenta[2,1- b; 3,4- b′] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT), 1-(3- methoxycarbonyl) propyl-1-phenyl[6,6] C61 (PC60 BM), and 1-(3-methoxycarbonyl) propyl-1- phenyl[6,6] C71 (PC70 BM). We demonstrate that out of the many possible combinations of the component materials, one specific combination emerges as the best to reduce the spectral overlap of the two bulk heterojunction blends and thereby to ensure an optimized short-circuit current density (Jsc). Furthermore, the calculations allow us to predict the maximum Jsc achievable in tandem cells based on P3HT and PCPDTBT. Finally, we show that the efficient tandem cell realized and described recently by Kim [Science 317, 222 (2007)] ensures balanced absorption in the top and bottoms cells. © 2007 American Institute of Physics.
AB - We have carried out detailed optical simulations of tandem solar cells based on the following organic semiconductors: poly(3-hexylthiophene) (P3HT), poly[2,6-(4,4-bis-(2-ethylhexyl)-4H- cyclopenta[2,1- b; 3,4- b′] dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT), 1-(3- methoxycarbonyl) propyl-1-phenyl[6,6] C61 (PC60 BM), and 1-(3-methoxycarbonyl) propyl-1- phenyl[6,6] C71 (PC70 BM). We demonstrate that out of the many possible combinations of the component materials, one specific combination emerges as the best to reduce the spectral overlap of the two bulk heterojunction blends and thereby to ensure an optimized short-circuit current density (Jsc). Furthermore, the calculations allow us to predict the maximum Jsc achievable in tandem cells based on P3HT and PCPDTBT. Finally, we show that the efficient tandem cell realized and described recently by Kim [Science 317, 222 (2007)] ensures balanced absorption in the top and bottoms cells. © 2007 American Institute of Physics.
KW - Absorption
KW - Current density
KW - Heterojunctions
KW - Product design
KW - Semiconducting organic compounds
KW - Molecular absorption
KW - Organic tandem cells
KW - Solar cells
U2 - 10.1063/1.2825651
DO - 10.1063/1.2825651
M3 - Article
VL - 102
JO - Journal of applied physics
JF - Journal of applied physics
SN - 0021-8979
IS - 12
ER -