Hydrogenated amorphous silicon thin film solar cell with buffer layer of DNA-CTMA biopolymer

摘要

The characteristics of nip-type a-Si：H thin film solar cells based on DNA-CTMA biopolymer was investigated. The DNA-CTMA was used as the buffer layer in nip-type a-Si:H solar cell. The Eopt of the DNA-CTMA biopolymer was measured with UV-VIS spectrometer. The Eopt of DNA-CTMA was determined as 3.96 eV by the plot of (Ahv)2 versus hu. All films of amorphous materials were deposited by PECVD method. The solar cell with a simple structure of glass/ITO-a-Si:H/i-a-Si：H/p-a-Si：H/DNA-CTMA/Al was fabricated. The various values of Voc, Jsc, FF, and conversion efficiency η were measured under 100 mW/cm2 (AM 1.5) solar simulator irradiation. Consequently, the resulting in solar cell showed an enhancement in conversion efficiency η compared to conventional nip-type a-Si:H solar cell without buffer layer of DNA-CTMA biopolymer.