Bhardwaj, Ramil K. and Bharti, Vishal and Gaur, Jitender and Sharma, Abhishek and Sonania, Annu and Mohanty, Dibyajyoti and Jain, Shilpa and Sharma, Gauri D. and Chaudhari, Neeraj and Chand, Suresh and Banerjee, Kamalika (2014) In-situ Growth of CdS Nanorods in PTB7 by Solvothermal Process for Hybrid Organic Inorganic Solar Cell applications. In: 17th International Workshop on the Physics of Semiconductor Devices (IWPSD) , DEC 10-14, 2013, Noida, INDIA .

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We demonstrate a high yielding, green approach using solvothermal, in-situ growth of CdS nanorods (NRs) in a low band gap polymer, poly [[4,8-bis[(2-ethylhexy)oxy]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-bithiophenediyl]] (PTB7). The use of chloroaniline dithiocarbamate and chloroaniline as ligands to functionalize the Cd (II) ions provides a new path for solubilization of Cd (II) complex in the chlorobenzene solvent. It removes use of volatile and hazardous chemicals such as pyridine as ligand which are conventionally used to enhance solubility of such complexes. It is the first example of solvothermal process used for in-situ growth of CdS NRs in a polymer matrix. This nanocomposite is used to fabricate hybrid-organic-inorganic-solar cells (HOISC) as donor acceptor combination in the bulk hetrojunction (BHJ) geometry. The incorporation of CdS NRs shows significant decrease in the band gap of PTB7 from 1.71 eV to 1.59 eV and the photoluminescence (PL) studies show significant quenching in the PL of PTB7 by the addition of CdS NRs. This suggests that the PTB7:CdS NRs is a potential nanocomposite for the bulk heterojunction active layer in the HOISCs. The HOISCs fabricated using the PTB7:CdS as donor-acceptor combination give power conversion efficiency of the order of 1.16%. This work has implication in the development of green economical and efficient HOISC by using highly controlled synthetic process.

Item Type: Conference or Workshop Item (Paper)
Subjects: Engineering
Materials Science
Depositing User: Dr. Rajpal Walke
Date Deposited: 16 Oct 2015 07:08
Last Modified: 16 Oct 2015 07:08

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