Hydrogenated amorphous carbon based solar cells by pulsed laser deposition with mixture of graphite and camphor as precursor materials

• Published in: Surface Engineering
• Main Author: Rusop M.; Tian X.M.; Soga T.; Jimbo T.; Umeno M.; Sharon M.
• Format: Article
• Language: English
• Published: 2007
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-35348982823&doi=10.1179%2f174329406X122982&partnerID=40&md5=a94adfec29deb43bf9d64a7098e2069e

The authors have deposited hydrogenated amorphous carbon films (a-C:H) on quartz and ρ type silicon substrates (100) by pulsed laser deposition (PLD) using a mixture of graphite and camphor powders at room temperature. The presence of hydrogen in the a-C:H films has been revealed by fourier transform Infrared spectroscopy (FTIR) measurement. The solar cell structure of a-C:H/p-Si was also fabricated. The formation of a heterojunction between the a-C:H films and silicon substrate was confirmed by the current-voltage (I-V) measurement in the dark and under illumination conditions. The structure of a-C:H/p-Si showed photovoltaic characteristics with an open circuit voltage Voc of 400 mV and short circuit current density Jsc of ∼15 mA cm -2 under illumination [air mass (AM) 1.5, 100 mW cm-2, 25°C]. From the calculation, the energy conversion efficiency and fill factor were found to be approximately 2.1% and 0.38 respectively. The carbon layer Is contributed to the energy conversion efficiency, which was proved by the measurement of quantum efficiency. © 2007 Institute of Materials, Minerals and Mining.