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Proceedings Paper

Ultrafast multi-phasic electron injection in efficient non-aggregated hyperbranched zinc phthalocyanine sensitized solar cells
Author(s): Yong Li; Peifen Lu; Xingzhong Yan; Lu Jin; Zhonghua Peng
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Paper Abstract

A novel hyperbranched zinc phthalocyanine dye, i.e. HBZnPc-COOH, was synthesized, characterized, and applied into dye-sensitized solar cells (DSSCs) as TiO2 sensitizer. UV-visible absorption, steady-state fluorescence, femtosecond time-resolved fluorescence, cyclic voltammetry, current–voltage characteristics, and photoelectrical properties of the active material/device were investigated. The utilization of hyperbranched structure was proved to be able to solve the aggregation issue of phthalocyanine dyes on TiO2 surface which has been widely considered as one of the key limiting issues that severely lower the efficiencies of phthalocyanine dye sensitized solar cells. With appropriate highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels, HBZnPc-COOH exhibited efficient and ultrafast multi-phasic electron injection from both the Soret band and Q band to the conduction band of TiO2, leading to a solar cell power conversion efficiency of 1.15% and a high incident photon to current conversion efficiency of 66.7% at 670 nm.

Paper Details

Date Published: 13 September 2012
PDF: 10 pages
Proc. SPIE 8477, Organic Photovoltaics XIII, 84771U (13 September 2012); doi: 10.1117/12.933940
Show Author Affiliations
Yong Li, South Dakota State Univ. (United States)
Univ. of Missouri, Kansas City (United States)
Peifen Lu, South Dakota State Univ. (United States)
Xingzhong Yan, South Dakota State Univ. (United States)
Lu Jin, Univ. of Missouri, Kansas City (United States)
Zhonghua Peng, Univ. of Missouri, Kansas City (United States)

Published in SPIE Proceedings Vol. 8477:
Organic Photovoltaics XIII
Zakya H. Kafafi; Christoph J. Brabec; Paul A. Lane, Editor(s)

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