Amorphous-Silicon / Polymer Solar Cells and Key Design Rules for Hybrid Solar Cells

Autor:	Qi Wang, Michael D. McGehee, Vignesh Gowrishankar, Shawn R. Scully, Howard M. Branz
Rok vydání:	2006
Předmět:	Amorphous silicon Valence (chemistry) Materials science Silicon business.industry chemistry.chemical_element Hybrid solar cell Solar energy Polymer solar cell Organic semiconductor chemistry.chemical_compound chemistry Chemical engineering Optoelectronics business HOMO/LUMO
Zdroj:	2006 IEEE 4th World Conference on Photovoltaic Energy Conference.
DOI:	10.1109/wcpec.2006.279419
Popis:	Hybrid solar cells combine the advantages of organic and inorganic materials. We report on the fabrication and performance of hydrogenated amorphous silicon (a-Si:H) / poly(3-hexylthiophene) (P3HT) and a-Si:H / poly(2- methoxy-5-(2?-ethyl-hexyloxy)-1,4-phenylenevinylene) (MEH-PPV) solar cells. The a-Si:H/P3HT system is found to be almost as efficient as titania/P3HT systems. However, the a-Si:H/MEH-PPV system exhibits poorer efficiency vis-a-vis a-Si:H/P3HT and titania/MEH-PPV. This is hypothesized to be due to enhanced energy transfer from MEH-PPV to a-Si:H, coupled with inefficient backward hole transfer, due to the small offset between the highest occupied molecular orbital (HOMO) of MEH-PPV and the valence band edge of a-Si:H, and the extended valence bandtail states in a-Si:H
Databáze:	OpenAIRE
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