TY  - JOUR
A1  - Albrecht, Steve
A1  - Grootoonk, Bjorn
A1  - Neubert, Sebastian
A1  - Roland, Steffen
A1  - Wordenweber, Jan
A1  - Meier, Matthias
A1  - Schlatmann, Rutger
A1  - Gordijn, Aad
A1  - Neher, Dieter
T1  - Efficient hybrid inorganic/organic tandem solar cells with tailored recombination contacts
T2  - Solar energy materials & solar cells : an international journal devoted to photovoltaic, photothermal, and photochemical solar energy conversion
N2  - 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 similar 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%. (C) 2014 Elsevier B.V. All rights reserved.
KW  - Hybrid solar cells
KW  - Tandem solar cells
KW  - Organic solar cells
KW  - Bulk heterojunction
KW  - Efficiency optimization
Y1  - 2014
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/37695
SN  - 0927-0248
SN  - 1879-3398
VL  - 127
SP  - 157
EP  - 162
PB  - Elsevier
CY  - Amsterdam
ER  -