Abstract
This article reports a p-type Poly [[4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b’]dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl) carbonyl] thieno [3,4-b] thiophenediyl ]] (PTB7) thin film based Al/PTB7/Si/Al vertical structure for white light detection application. The thin film of PTB7 polymer was deposited via a low-cost and facile floating-film transfer method (FTM). The morphology of the PTB7 film is analyzed by tapping mode Atomic Force Microscopy (AFM) which gives an average surface roughness as ~0.703 nm. The maximum responsivity and detectivity of the fabricated device were obtained as ~146.13 mA/W and ~4.137 × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sup> Jones at ~0.228 mW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> white light intensity under a reverse bias of -2 V. The rise/fall time of the fabricated sensing device was measured as ~0.016/~0.112 s respectively.
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