Highly luminescent Quaternary Cu-Zn-In-S (CZIS) nanocrystals (NCs) were synthesized via direct hot injection method. The low toxic chloride metal precursors and non-coordinate, high boiling solvent 1-Octadecene were employed for this synthesis. The optical properties of synthesized NCs were tuned by changing the composition of metal precursor ratios. Two sets of composition of metal precursor ratios were studied by changing the Cu: Zn metal precursor ratio and the Cu: In metal precursor ratio. The synthesized NCs shows the tunable photoluminescence (PL) spectra of emission color from NIR to visible region with the variation of metal precursor ratios. The synthesized NCs shows narrow size distribution and average size of 2.5 - 4 nm. The time-resolved fluorescence decay studies and time-correlated single photon counting spectroscopic studies were carried out to study the photophysical dynamics and fluorescence (FL) lifetime of these quaternary NCs. The synthesized NCs shows tunability of FL lifetime with the variation of composition of the metal precursor’s ratios and shows the longer FL lifetimes. These type of quaternary NCs shows promising applications in solar cells, light emitting diodes and biological imaging studies. To investigate the use of this synthesized NCs in solar cell applications the quantum dot sensitized solar cells (QDSSC) were fabricated and their photovoltaic characteristics were studied with the different metal precursor’s compositions. <br/>

Synthesis of quaternary Cu-Zn-In-S nanocrystals and photovoltaic characteristics

256th National Meeting (2018)

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