Abstract
18.78% efficiency of crystalline silicon (Si) solar cells was achieved through introducing the combined nanopore/pyramid textures. These hierarchical structures possessed the ultra-low reflectivity with values <6% under the various illumination angles from 0 to 60° evidencing their remarkable omnidirectional light-trapping capability. Although the greatly improved light-trapping effect of the hierarchical structures was demonstrated, we found that the increased formation durations of Si nanopores led the substantial increase of photoluminescent characteristics that could limit the efficient separation of photogenerated carriers through charge recombination. Moreover, the positive correlation in surface roughness of nanopore arrays with respect to the elongated etching durations was evidenced, and these issues could increase the series resistance of solar cells owing to poor interfacial contact between nanopores and front electrodes. Thus, there existed the optimal combination between two-scale textures critically for both photonic and electrical management of cell design. By optimizing the etching durations for the controlled nanopore formation, the improved light-trapping characteristics and fairly unchanged contact resistance with front electrode was achieved, possessing the improved conversion efficiency with >0.58% of increased value beyond the typical microtexture-based solar cells.
| Original language | English |
|---|---|
| Pages (from-to) | 725-732 |
| Number of pages | 8 |
| Journal | Applied Surface Science |
| Volume | 478 |
| DOIs | |
| Publication status | Published - 2019 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Surfaces, Coatings and Films
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18.78% hierarchical black silicon solar cells achieved with the balance of light-trapping and interfacial contact. / Putra, Ilham Ramadhan; Li, Jheng Yi; Chen, Chia-Yun.
In: Applied Surface Science, Vol. 478, 01.06.2019, p. 725-732.Research output: Contribution to journal › Article
TY - JOUR
T1 - 18.78% hierarchical black silicon solar cells achieved with the balance of light-trapping and interfacial contact
AU - Putra, Ilham Ramadhan
AU - Li, Jheng Yi
AU - Chen, Chia-Yun
PY - 2019/6/1
Y1 - 2019/6/1
N2 - 18.78% efficiency of crystalline silicon (Si) solar cells was achieved through introducing the combined nanopore/pyramid textures. These hierarchical structures possessed the ultra-low reflectivity with values <6% under the various illumination angles from 0 to 60° evidencing their remarkable omnidirectional light-trapping capability. Although the greatly improved light-trapping effect of the hierarchical structures was demonstrated, we found that the increased formation durations of Si nanopores led the substantial increase of photoluminescent characteristics that could limit the efficient separation of photogenerated carriers through charge recombination. Moreover, the positive correlation in surface roughness of nanopore arrays with respect to the elongated etching durations was evidenced, and these issues could increase the series resistance of solar cells owing to poor interfacial contact between nanopores and front electrodes. Thus, there existed the optimal combination between two-scale textures critically for both photonic and electrical management of cell design. By optimizing the etching durations for the controlled nanopore formation, the improved light-trapping characteristics and fairly unchanged contact resistance with front electrode was achieved, possessing the improved conversion efficiency with >0.58% of increased value beyond the typical microtexture-based solar cells.
AB - 18.78% efficiency of crystalline silicon (Si) solar cells was achieved through introducing the combined nanopore/pyramid textures. These hierarchical structures possessed the ultra-low reflectivity with values <6% under the various illumination angles from 0 to 60° evidencing their remarkable omnidirectional light-trapping capability. Although the greatly improved light-trapping effect of the hierarchical structures was demonstrated, we found that the increased formation durations of Si nanopores led the substantial increase of photoluminescent characteristics that could limit the efficient separation of photogenerated carriers through charge recombination. Moreover, the positive correlation in surface roughness of nanopore arrays with respect to the elongated etching durations was evidenced, and these issues could increase the series resistance of solar cells owing to poor interfacial contact between nanopores and front electrodes. Thus, there existed the optimal combination between two-scale textures critically for both photonic and electrical management of cell design. By optimizing the etching durations for the controlled nanopore formation, the improved light-trapping characteristics and fairly unchanged contact resistance with front electrode was achieved, possessing the improved conversion efficiency with >0.58% of increased value beyond the typical microtexture-based solar cells.
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U2 - 10.1016/j.apsusc.2019.02.001
DO - 10.1016/j.apsusc.2019.02.001
M3 - Article
VL - 478
SP - 725
EP - 732
JO - Applied Surface Science
JF - Applied Surface Science
SN - 0169-4332
ER -