Textured micrometer scale templates as light managing fabrication platform for organic solar cells
US9401442B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2011 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Oct 17, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/549
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
A three-dimensional, microscale-textured, grating-shaped organic solar cell geometry. The solar cells are fabricated on gratings to give them a three-dimensional texture that provides enhanced light absorption. Introduction of microscale texturing has a positive effect on the overall power conversion efficiency of the devices. This grating-based solar cell having a grating of pre-determined pitch and height has shown improved power-conversion efficiency over a conventional flat solar cell. The improvement in efficiency is accomplished by homogeneous coverage of the grating with uniform thickness of the active layer, which is attributed to a sufficiently high pitch and low height of the underlying gratings. Also the microscale texturing leads to suppressed reflection of incident light due to the efficient coupling of the incident light into modes that are guided in the active layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.