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Mechanism of photoinduced charge transfer at MEH-PPV and titanium dioxide nanoparticle interface

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Title Statement Mechanism of photoinduced charge transfer at MEH-PPV and titanium dioxide nanoparticle interface
 
Added Entry - Uncontrolled Name Shankar, Jaya Seeli; School for Advanced Research in Polymer (SARP) – ARSTPS, Central Institute of Plastics Engineering and Technology (CIPET), Chennai, Tamil Nadu, India
Kumar, Sangeetha Ashok; School for Advanced Research in Polymer (SARP) – ARSTPS, Central Institute of Plastics Engineering and Technology (CIPET), Chennai, Tamil Nadu, India
Periyasami, Bhuvana K; Department of Plastics Technology, Central Institute of Plastics Engineering and Technology (CIPET), Chennai, Tamil Nadu, India
Nayak, Sanjay K; School for Advanced Research in Polymer (SARP) – ARSTPS, Central Institute of Plastics Engineering and Technology (CIPET), Chennai, Tamil Nadu, India
 
Uncontrolled Index Term Charge transfer; Conjugated polymer; Hybrid polymer nanocomposite (HPNC); Photoluminescence quenching; Photovoltaics
 
Summary, etc. <p style="text-align: justify;">In this study, we investigated mechanisms of photoinduced electron transfer from a conjugated polymer (poly(2-methoxy-5-(2-ethylhexyloxy) 1,4-phenylenevinylene (MEH-PPV) to titanium dioxide (TiO<sub>2</sub>) nanoparticles (acceptor) through steady-state photoluminescence (PL) spectroscopy. Since mixed phase TiO<sub>2 </sub>has better photocatalytic compared to single phase, it is an efficient charge separation process during photoexcitation of polymer nanocomposites by incorporating the mixed phase TiO<sub>2</sub> nanoparticles into the MEH-PPV polymer matrix through <em>in situ</em> polymerization. Structural characterization revealed only physical interaction between the polymer matrix and dispersed nanoparticles. The absorbance spectra of nanocomposites also indicated the absence of ground state complex formation. Luminescence quenching of polymer nanocomposites compared to pristine MEH-PVV signifies the charge transfer taking place at the MEH-PPV/TiO<sub>2</sub> interfaces. Thus, the MEH-PPV/ mixed phase TiO<sub>2</sub> nanocomposite serves as an active layer for photovoltaic application.</p>
 
Publication, Distribution, Etc. Indian Journal of Chemistry -Section A (IJCA)
2020-10-06 15:05:21
 
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http://op.niscair.res.in/index.php/IJCA/article/view/41262
 
Data Source Entry Indian Journal of Chemistry -Section A (IJCA); ##issue.vol## 59, ##issue.no## 9 (2020): INDIAN JOURNAL OF CHEMISTRY - SECTION A
 
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