Carbon-based solar cell from amorphous carbon with nitrogen incorporation

• Published in: Advanced Materials Research
• Main Author: Fadzilah A.N.; Dayana K.; Rusop M.
• Format: Conference paper
• Language: English
• Published: 2012
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84869384492&doi=10.4028%2fwww.scientific.net%2fAMR.576.785&partnerID=40&md5=8b082355b3d845480cb0b711b0e5ad96

Nitrogen doped amorphous carbon (n-C:N) solar cells were successfully prepared using a simple and low cost Chemical Vapor Deposition (CVD) method using camphor oil as a precursor. Four samples of n-C:N were deposited by varying the deposition temperature (500°C, 550°C, 600°C, 650°C). The fabricated solar cell using n-C:N with the configuration of Au/n-C:N/p-Si/Au achieved an increasing efficiency as temperature increase (0.000202% to 0.001089%). As a reference, pure a-C was deposited at 500°C and exhibit 0.000048% efficiency. The current-voltage (I-V) graph emphasized on the linear graph (ohmic) for the a-C thin films, whereas for the p-n device structure, a rectifying curve was obtained. Electrical conductitivity possesses increasing value (1.69 x 10-2 to 22 Ω-1 cm-1) due to increasing sp2 ratio in a-C as temperature increase. The rectifying curves signify the heterojunction between the n-doped a-C film and the p-Si substrate and designate the generation of electron-hole pair of the samples under illumination. Photoresponse characteristics of the deposited a-C was highlighted when being illuminated (AM 1.5 illumination: 100 mW/cm2, 25°C) and optical band gap for the nitrogen doped a-C is reported from 0.75 eV to 0.25 eV as temperature increase. © (2012) Trans Tech Publications, Switzerland.