Enhancement of Photovoltaic Characteristics Using a Suitable Solvent in Hybrid Polymer/Multiarmed CdS Nanorods Solar Cells

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• 作者：Li Wang ; YanShan Liu ; Xi Jiang ; DongHuan Qin ; Yong Cao
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：July 5, 2007
• 年：2007
• 卷：111
• 期：26
• 页码：9538 - 9542
• 全文大小：506K
• 年卷期：v.111,no.26(July 5, 2007)
• ISSN：1932-7455

文摘

Multiarmed CdS nanorods have been used as the electron acceptors to fabricate efficient hybrid solar cells.It was demonstrated that when pyridine was used as a solvent for spin coating an active layer consisting ofMEH-PPV/CdS blend instead of chlorobenzene, short-circuit current of the device can typically be increasedby six times. The FTIR transmission spectrum shows that pyridine replaces the surfactant (HDA) moleculesattached to the nanocrystals' surface after posttreatment of CdS nanorods by refluxing in pyridine. Transmissionelectron microscopy, atomic force microscopy, current-voltage characteristics, photocurrent action spectrameasurements, and photoluminescence quenching were used to characterize MEH-PPV/CdS blend spin-coatedfrom pyridine solution. Thermal treatment of the blend films can further enhance the short-circuit current inthe device. Best device performance was achieved with a power conversion efficiency of 1.17% under AM1.5illumination (100 mW cm^-2), significantly higher than that reported so far for MEH-PPV/CdS hybrid devices.