Harvesting excitons and improving charge transport in organic-inorganic hybrid photovoltaic cells

Author

McGehee, Michael D. ; Liu, Yuxiang ; Goh, Chiatzun ; Gowrishankar, Vignesh ; Srinivasan, Bhavani ; Scully, Shawn

Author_Institution

Dept. of Mater. Sci. & Eng., Stanford Univ., CA

Volume

1

fYear

2005

fDate

22-22 June 2005

Firstpage

143

Lastpage

145

Abstract

The authors describe the studies of exciton diffusion and charge transport in polymer-titania and polymer-alumina systems. We show that the exciton diffusion length is 12 nm in MDMO-PPV, the effective exciton diffusion length can be even larger if two polymers are used to promote efficient Forster energy transfer, and charge carrier mobilities higher than 10^minus;3 cm²/Vs can be obtained in the relevant direction with regioregular poly(3-hexyl thiophene) by aligning the chains in nanopores

Keywords

alumina; carrier mobility; charge exchange; diffusion; excitons; organic-inorganic hybrid materials; photovoltaic cells; polymers; titanium compounds; 12 nm; Al₂O₃; Forster energy transfer; MDMO-PPV; charge carrier mobilities; charge transport; exciton diffusion; organic-inorganic hybrid photovoltaic cells; polymer-alumina systems; polymer-titania systems; regioregular poly(3-hexyl thiophene); Coatings; Electrons; Energy exchange; Excitons; Length measurement; Organic semiconductors; Photovoltaic cells; Photovoltaic systems; Polymers; Solar power generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Device Research Conference Digest, 2005. DRC '05. 63rd

Conference_Location

Santa Barbara, CA

Print_ISBN

0-7803-9040-7

Type

conf

DOI

10.1109/DRC.2005.1553095

Filename

1553095