Abstract
Abstract By inserting a nano-sized Ag layer between bottom Ag-doped In 2 O 3 (AIO) and a top AIO layer, we were able to control the sheet resistance and optical transmittance of AIO films for application in organic solar cells (OSCs) as a transparent electrode. To optimize the AIO/Ag/AIO multilayer, we investigated the electrical, optical, structural and morphological properties of the AIO/Ag/AIO multilayer as a function of Ag interlayer thickness with a constant bottom and top AIO thickness of 35 nm. The optimized AIO/Ag/AIO multilayer showed a much lower resistivity of 3.988 × 10 -5 Ω cm and a higher optical transmittance of 84.79% than the values (4.625 × 10 -4 Ω cm and 78.36%) of the single AIO film, due to the high conductivity of the metallic Ag layer and the antireflection effect of the symmetric AIO/Ag/AIO structure. In addition, we investigated the performances of OSCs with AIO/Ag/AIO electrodes as a function of Ag interlayer thickness to determine the optimal Ag thickness to produce a high power conversion efficiency (PCE) of the OSCs. Based on the PCE of the OSCs, we correlated the performance of the OSCs with the Ag interlayer thickness in the AIO/Ag/AIO multilayer and suggested a possible mechanism to explain the dependency of PCE on Ag thickness in AIO/Ag/AIO multilayer electrodes.
Original language | English |
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Article number | 30148 |
Pages (from-to) | 88-95 |
Number of pages | 8 |
Journal | Applied Surface Science |
Volume | 347 |
DOIs | |
State | Published - 2015 |
Keywords
- Ag-doped In O
- AIO/Ag/AIO multilayer
- Nano-sized Ag layer
- Organic solar cells
- Power conversion efficiency
- Transparent electrode