- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Corrugation Enabled Asymmetrically Ultrastretchable (95%) Monocrystalline Silicon Solar Cells with High Efficiency (19%)
摘要： Stretchable solar cells are of growing interest due their key role in realizing many applications such as wearables and biomedical devices. Ultrastretchability, high energy-efficiency, biocompatibility, and mechanical resilience are essential characteristics of such energy harvesting devices. Here, the development of wafer-scale monocrystalline silicon solar cells with world-record ultrastretchability (95%) and efficiency (19%) is demonstrated using a laser-patterning based corrugation technique. The demonstrated approach transforms interdigitated back contacts (IBC) based rigid solar cells into mechanically reliable but ultrastretchable cells with negligible degradation in the electric performance in terms of current density, open-circuit voltage, and fill factor. The corrugation method is based on the creation of alternating grooves resulting in silicon islands with different shapes. The stretchability is achieved by orthogonally aligning the active silicon islands to the applied tensile stress and using a biocompatible elastomer (Ecoflex) as a stretchable substrate. The resulting mechanics ensure that the brittle silicon areas do not experience significant mechanical stresses upon asymmetrical stretching. Different patterns are studied including linear, diamond, and triangular patterns, each of which results in a different stretchability and loss of active silicon area. Finally, finite element method based simulation is conducted to study the generated deformation in the different patterned solar cells.
关键词： stretchable electronics,monocrystalline silicon,photovoltaics,interdigitated back contacts,corrugation
更新于2025-09-19 17:13:59
-
From PV to bio: Surviving the photovoltaic bubble at laser centre UPM
摘要： Laser Centre UPM is one of the leading Research Centers in Spain in the field of industrial applications of high power lasers. Founded in 1998 in the oldest and largest Spanish Technical University, Universidad Politécnica de Madrid, its activity is focused in technological transfer of laser-based processes to industry. With an important experience in laser micromachining using fast and ultrafast lasers, one of the fields in which its activity has produced more relevant results is laser process development for photovoltaic (PV) industry. Starting in 2004, its activity in this field in collaboration with other public Spanish institutions and other industrial partners has had a remarkable scientific and technological impact. Unfortunately, this activity was seriously restricted since 2010 due to the economic crisis in general and the photovoltaic industry evolution in particular. However, the background acquired in some particular applications and the inertia obtained with that activity has opened new fields of activity of Laser Center UPM in advanced laser-based processes for biomedicine. This paper summarizes the main achievements of Laser Center UPM in PV and how it performed the transition to new applications in a completely different sector, like biomedicine, using the experienced accumulated in the development of new laser based processes for PV.
关键词： metallization,laser bioprinting,LIFT,laser microprocessing,silicon photovoltaics
更新于2025-09-12 10:27:22
-
Silicon Contact Defects Get Fired
摘要： The large majority of installed photovoltaics today are based on silicon. Improvements in their performance and reductions in their manufacturing cost can have a direct global impact on the photovoltaic market, provided this can be realized with minimal disruption to existing manufacturing lines. Recently in Nature Energy, Ballif and colleagues demonstrate an easily integrated method based on a single firing thermal anneal to passivate rear contacts in silicon solar cells.
关键词： thermal anneal,silicon,photovoltaics,solar cells,passivation
更新于2025-09-09 09:28:46