Preparation and photo-induced charge transfer of the composites based on 3D structural CdS nanocrystals and MEH-PPV

Journal Article · Sat May 15 00:00:00 EDT 2010 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2010.01.028· OSTI ID:21318377

Deng, Dan; Shi, Minmin; Chen, Fei; Chen, Lin; Jiang, Xiaoxia; Chen, Hongzheng ^[1]

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1. Key Laboratory of Macromolecule Synthesis and Functionalization of Ministry of Education, State Key Lab of Silicon Materials, Zhejiang University, Hangzhou 310027 (China)

We report the synthesis of 3D structural CdS nanocrystals by a simple biomolecule-assisted hydrothermal process. The CdS nanocrystals are composed of many branched nanorods with the diameter of about 50 nm, and the length of about 250 nm. The phase and crystallographic properties are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffractometry (XRD). The composites based on CdS nanocrystals and poly[2-methoxy-5-(2-ethylhexyloxy-p-phenylenevinylene)] (MEH-PPV) have been prepared by spin-coating of the mixture in the common solvent. The optical properties of the composites are investigated using ultraviolet-visible (UV-Vis) absorption and photoluminescence (PL) spectroscopies. A significant fluorescence quenching of MEH-PPV in the composites is observed at high CdS nanocrystals/MEH-PPV ratios, indicating that the photo-induced charge transfer occurred due to the energy level offset between the donor MEH-PPV and the acceptor CdS nanocrystals. The obvious photovoltaic behavior of the solar cell made from this composite further demonstrates the mentioned photo-induced charge transfer process. (author)

• OSTI ID: 21318377
• Journal Information: Solar Energy, Vol. 84, Issue 5; Other Information: Elsevier Ltd. All rights reserved; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
14 SOLAR ENERGY
CADMIUM SULFIDES
NANOSTRUCTURES
CADMIUM SULFIDE SOLAR CELLS
FLUORESCENCE
PHOTOLUMINESCENCE
ULTRAVIOLET RADIATION
OPTICAL PROPERTIES
PHOTOVOLTAIC EFFECT
LENGTH
MIXTURES
ENERGY LEVELS
VISIBLE RADIATION
SOLVENTS
SYNTHESIS
ORGANIC OXYGEN COMPOUNDS
Photo-induced charge transfer
Inorganic-organic composites