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Hybrid P3HT/CdSe Photovoltaic Cells: Effects of Nanocrystal Size and Device Aging

Published online by Cambridge University Press:  31 January 2011

Jihua Yang ,
Renjia Zhou ,
Aiwei Tang  and
Jiangeng Xue
Jihua Yang
Affiliation:
[email protected], University of Florida, Materials Science & Engineering, Gainesville, Florida, United States
Renjia Zhou
Affiliation:
[email protected]
Aiwei Tang
Affiliation:
[email protected], University of Florida, Materials Science & Engineering, Gainesville, Florida, United States
Jiangeng Xue
Affiliation:
[email protected], University of Florida, Materials Science & Engineering, Gainesville, Florida, United States
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Abstract

Hybrid solar cells based on conjugated polymers and colloidally synthesized inorganic nanoparticles have been recognized as an alternative to all-organic solar cells due to the intrinsically higher charge transport property in inorganic component. In this work, CdSe nanoparticles with different sizes, served as the electron acceptor, have been used together with poly(3-hexylthiophene) (P3HT) as the active layer for the hybrid solar cells. The power-conversion efficiency (ηp) of these devices strongly depends on the size of the CdSe nanoparticles, increasing from ηp ˜0.5% for 4.0 nm size nanoparticles to ηp ˜2.4% for 6.8 nm size nanoparticles under AM 1.5 G solar illumination. Furthermore, the devices also exhibit an unusual initial aging period when exposed to the air, which results in a significant enhancement in the short-circuit current, open-circuit voltage and power conversion efficiency.

Keywords

photovoltaicpolymersemiconducting
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1212: Symposium S – Organic Materials and Devices for Sustainable Energy Systems , 2009 , 1212-S11-07
Copyright
Copyright © Materials Research Society 2010

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