Preparation and Properties of Solar Cell from CdSe Nanocrystals and Conjugated Polymer Composites

Chem. J. Chinese Universities

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Preparation and Properties of Solar Cell from CdSe Nanocrystals and Conjugated Polymer Composites

LIU Yan-Shan, WANG Li, CAO Yong

Institute of Polymer Optoelectronic Materials and Devices, Key Laboratory of Special Functional Materials, South China University of Technology, Guangzhou 510640, China

Received:2006-04-24 Revised:1900-01-01 Online:2007-03-10 Published:2007-03-10
Contact: CAO Yong

Abstract

Abstract: CdSe nanospheres(ns-CdSe) with diameters of 5 nm were prepared through an organometallic method at a relatively low temperature, by using cadmium stearate as the precursor and oleic acid as the surfactant. The TEM, UV-Vis absorption and PL spectra indicate that the CdSe nanocrystals were monodispersed nanospheres with the first exciton absorption peak at around 625 nm and the emission peak at around 652 nm. The ns-CdSe can be readily dispersed in organic solvent and form a homogeneous blend with conjugated polymers. The PL spectra of the ns-CdSe/polymer composite films show that the photoluminescence of the conjugated polymers are effectively quenched upon the addition of ns-CdSe. Solar cell were fabricated from the composites of ns-CdSe and conjugated polymers(MEH-PPV or P3HT). Under AM1.5 illumination(100 mW/cm²), the I_SC, V_OC, FF and η reached 1.56 mA/cm², 0.75 V, 34.5% and 0.40% for the device from the ns-CdSe/MEH-PPV(15∶1 mass ratio) and 1.93 mA/cm², 0.65 V, 38.4% and 0.48% for the device from the ns-CdSe/P3HT(10∶1 mass ratio) respectively.

Key words: CdSe nanocrystals, Conjugated polymer, Solar cell

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LIU Yan-Shan, WANG Li, CAO Yong. Preparation and Properties of Solar Cell from CdSe Nanocrystals and Conjugated Polymer Composites[J]. Chem. J. Chinese Universities, doi: .

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Preparation and Properties of Solar Cell from CdSe Nanocrystals and Conjugated Polymer Composites

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