Title :
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
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 10minus;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;
Conference_Titel :
Device Research Conference Digest, 2005. DRC '05. 63rd
Conference_Location :
Santa Barbara, CA
Print_ISBN :
0-7803-9040-7
DOI :
10.1109/DRC.2005.1553095
