TY  - JOUR
AU  - Albrecht, Steve
AU  - Grootoonk, Björn
AU  - Neubert, Sebastian
AU  - Roland, Steffen
AU  - Wördenweber, Jan
AU  - Meier, Matthias
AU  - Schlatmann, Rutger
AU  - Gordijn, Aad
AU  - Neher, Dieter
TI  - Efficient hybrid inorganic/organic tandem solar cells with tailored recombination contacts
JO  - Solar energy materials & solar cells
VL  - 127
SN  - 0927-0248
CY  - Amsterdam
PB  - North Holland
M1  - FZJ-2014-06488
SP  - 157 - 162
PY  - 2014
AB  - In this work, the authors present a 7.5% efficient hybrid tandem solar cell with the bottom cell made of amorphous silicon and a Si-PCPDTBT:PC70BM bulk heterojunction top cell. Loss-free recombination contacts were realized by combing Al-doped ZnO with either the conducting polymer composite PEDOT:PSS or with a bilayer of ultrathin Al and MoO3. Optimization of these contacts results in tandem cells with high fill factors of 70% and an open circuit voltage close to the sum of those of the sub-cells. This is the best efficiency reported for this type of hybrid tandem cell so far. Optical and electrical device modeling suggests that the efficiency can be increased to ~12% on combining a donor polymer with suitable absorption onset with PCBM. We also describe proof-of-principle studies employing light trapping in hybrid tandem solar cells, suggesting that this device architecture has the potential to achieve efficiencies well above 12%.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000338618000022
DO  - DOI:10.1016/j.solmat.2014.04.020
UR  - https://juser.fz-juelich.de/record/173075
ER  -