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Self-organized CdSe quantum dots onto the low bandgap 3-hexylthiophene/pyridine copolymers.

Journal of nanoscience and nanotechnology (2013-05-08)
Jin Wang, Xiaoxia Luo, Dalian Kang, Zhengfa Zhou, Weibing Xu, Yang Jiang
ABSTRACT

The low bandgap 3-hexylthiophene/pyridine copolymers (P3HT/PY) were synthesized and the composites of P3HT/PY and CdSe QDs were prepared. The characterization are performed with 1H NMR, UV-vis, PL, TEM, XPS and cyclic voltammetry (CV). The results show that the P3HT/PY copolymers have an electrochemical bandgap of 1.67 eV, while the composites show a broader absorption and a lower bandgap than the copolymers. The highly efficient fluorescence quenching of the composites indicates that the ultrafast charge transfer happened between the P3HT/PY copolymers and the CdSe QDs. The composites show a uniform dispersion and good compatibility, and the surface chemistry study verified the chemical bonding between them. In addition, both the copolymers and the composites exhibited p- and n-type doping ability, and the P3HT/PY/CdSe composites have a better donor-acceptor match, which is a promising p-n type semiconductor material.

MATERIALS
Product Number
Brand
Product Description

Supelco
Pyridine solution, certified reference material, 2000 μg/mL in methanol
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Pyridine hydrochloride, purum, ≥98.0% (AT)
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Pyridine hydrochloride, 98%
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Pyridine, ACS reagent, ≥99.0%
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Pyridine, ReagentPlus®, ≥99%
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Pyridine, suitable for HPLC, ≥99.9%
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Pyridine, ReagentPlus®, ≥99%
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Pyridine, anhydrous, 99.8%
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Pyridine hydrobromide, 98%
Supelco
Pyridine, analytical standard