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Interface engineering for graphene nanowalls/silicon Schottky solar cells prepared by polymer-free transfer method
- Source :
- Journal of Applied Physics. 128:025301
- Publication Year :
- 2020
- Publisher :
- AIP Publishing, 2020.
-
Abstract
- To date, almost all reported graphene nanowalls (GNWs)/Si solar cells are fabricated through the direct deposition of GNWs on the silicon wafer. In this work, we report a polymer-free transfer method of GNWs grown on the copper foil for the fabrication of GNWs/Si solar cells. This allows us to further improve the photovoltaic performance of the solar cells by means of interface engineering. An optimized photovoltaic conversion efficiency (PCE) of the as-fabricated GNWs/Si solar cell can reach up to 4.99%. Furthermore, the PCE of the device is further improved by introducing the spiro-OMeTAD thin film as an interface layer, which serves as an electron-blocking and hole-transporting layer through tuning the band structure of the solar cells. Without any chemical doping and anti-reflecting coating, the maximum PCE of 8.27% has been achieved for the GNWs/spiro-OMeTAD/Si solar cell through optimizing the dopant content and the thickness of the spiro-OMeTAD thin film. We believe that our study indicates a new route for the fabrication of high-efficiency, low-cost GNWs/Si Schottky heterojunction solar cells without the need for chemical doping of the GNWs.
- Subjects :
- 010302 applied physics
Materials science
Silicon
business.industry
Graphene
Doping
Photovoltaic system
General Physics and Astronomy
chemistry.chemical_element
Heterojunction
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
law.invention
chemistry
law
0103 physical sciences
Solar cell
Optoelectronics
Wafer
Thin film
0210 nano-technology
business
Subjects
Details
- ISSN :
- 10897550 and 00218979
- Volume :
- 128
- Database :
- OpenAIRE
- Journal :
- Journal of Applied Physics
- Accession number :
- edsair.doi...........5ac6cadeb6157dd4101eab1ca83df74f