Possibility to Use Hydrothermally Synthesized CuFeS 2 Nanocomposite as an Acceptor in Hybrid Solar Cell
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JMEPEG https://doi.org/10.1007/s11665-018-3142-z
Possibility to Use Hydrothermally Synthesized CuFeS2 Nanocomposite as an Acceptor in Hybrid Solar Cell Sayantan Sil, Arka Dey, Soumi Halder, Joydeep Datta, and Partha Pratim Ray (Submitted April 12, 2017; in revised form November 25, 2017) Here we have approached the plausible use of CuFeS2 nanocomposite as an acceptor in organic–inorganic hybrid solar cell. To produce CuFeS2 nanocomposite, hydrothermal strategy was employed. The roomtemperature XRD pattern approves the synthesized material as CuFeS2 with no phase impurity (JCPDS Card no: 37-0471). The elemental composition of the material was analyzed from the TEM-EDX data. The obtained selected area electron diffraction (SAED) planes harmonized with the XRD pattern of the synthesized product. Optical band gap (4.14 eV) of the composite from UV–Vis analysis depicts that the synthesized material is belonging to wide band gap semiconductor family. The HOMO (2 6.97 eV) and LUMO (2 2.93 eV) positions from electrochemical study reveal that there is a possibility of electron transfer from MEH-PPV to CuFeS2. The optical absorption and photoluminescence spectra of MEHPPV:CuFeS2 (donor:acceptor) composite were recorded sequentially by varying weight ratios. The monotonic blue shifting of the absorption peak position indicated the interaction between donor and acceptor materials. The possibility of electron transfer from donor (MEH-PPV) to acceptor (CuFeS2) was approved with photoluminescence analysis. Subsequently, we have fabricated a hybrid solar cell by incorporating CuFeS2 nanocomposite with MEH-PPV in open atmosphere and obtained 0.3% power conversion efficiency. Keywords
acceptor, donor, hydrothermal, quenching, solar cell
nanocomposite,
1. Introduction The synthesis of I-III-VI2 group ternary chalcogenide becomes a widespread interested matter for their high absorption coefficients, high conversion efficiency and low toxicity (Ref 1). For having wide band gap energy with weird and wonderful physical and chemical properties, these ternary chalcogenide compounds showed their potential applicability in the fields of solar cells, photodetectors and nonlinear optical devices (Ref 2-6). Chalcopyrite CuFeS2 is conceived as one of the promising semiconductor materials with unusual optical, electrical and magnetic properties (Ref 7, 8), which make it suitable for the application in optoelectronic devices. The chalcopyrite CuFeS2 has a tetragonal structure with space group I-42d, which can be considered as a doubled sphalerite cell with an ordered arrangement of the copper (Cu) and iron (Fe) atoms in the cation sublattice that are in tetrahedral coordination with sulfur (S) (Ref 9, 10). Compared with other tetrahedrally bonded compounds, the diverse interatomic distances and the electronegativities between the cations in chalcopyrite CuFeS2 This article is an invited paper selected from presentations at ‘‘ICETINN-2017, International Conference on Emerging Trends in Nanoscience and Nanotechnology,’’ held March 16–18, 2017, in Ma
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