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A novel wrap-around metal contact optimized for radial p–n junction Si wire solar cells 14-09-29
4
A novel wrap-around metal contact optimized for radial p–n junction Si wire solar cells
We designed a novel wrap-around metal contact that does not require a TCO film; consequently, the ρc of the wrap-around Si/Ag contacts was drastically decreased in comparison with conventional Si/ITO contacts. In addition, we were able to adjust the contact area during the fabrication process in order to vary Rc. Using the top metal contacts wraparound design resulted in a high fill factor of ~65.4%.
Optimal design for antireflective Si nanowire solar cells 14-07-03
3
Optimal design for antireflective Si nanowire solar cells
We investigated the photovoltaic performance of antireflective SiNWs by separately controlling wire length and filling ratio. Geometrical optimization using a high filling ratio (38%) and short wire length (~500 nm) could minimize surface and bulk recombination. Optimization could also reduce the shunting feature in SiNW solar cells.
Fast electroless fabrication of uniform mesoporous silicon layers 14-07-03
2
Fast electroless fabrication of uniform mesoporous silicon layers
We reported that PaCE is capable of fabricating uni-form and meso-PSi. Etching rates of more than 1.7 μm/min have been obtained under optimized conditions. The obtained meso-PSi shows superior uniformity over the micro-PSi. Electrostatic simulation based on the metal–Si nano-Schottky contact can qualitatively explain the morphological difference of PSi in moderately and highly doped Si. Our work provides a facile, cost-effective route to fabricate various PSi structures, which can be easily scaled to wafer size. Since the etching area would be no longer constrained by electrochemical cell s…
Highly electrocatalytic Cu2ZnSn(S1-xSex)4 counter electrodes for quantum-dot-sensitized solar cells 14-07-03
1
Highly electrocatalytic Cu2ZnSn(S1-xSex)4 counter electrodes for quantum-dot-sensitized solar cells
We demonstrated a new synthetic approach to prepare Cu2ZnSn(S1−xSex)4 nanocrystals with various S/Se ratios (x = 0, 0.2, 0.5, 0.85, and 1). LSV and EIS studies also revealed that the electron transfer kinetics and diffusion resistance of electrolyte were dictated by the S/Se ratios. In our study, the QDSSC with CZTSSe (x = 0.5) CE showed the highest energy conversion efficiency of 3.01%, which was higher than that (1.24%) obtained using Pt CE.
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