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

Journal Article · Sat May 15 04:00:00 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, Journal Name: Solar Energy Journal Issue: 5 Vol. 84; ISSN 0038-092X; ISSN SRENA4
• Country of Publication: United States
• Language: English

Related Subjects

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