Electrospray Deposition of Poly(3-hexylthiophene) Films for Crystalline Silicon/Organic Hybrid Junction Solar Cells

Abstract

The electrospray deposition (ESD) of poly(3-hexylthiophene) (P3HT) films for use in crystalline silicon/organic hybrid heterojunction solar cells on a crystalline silicon (c-Si) wafer was investigated using real-time characterization by spectroscopic ellipsometry (SE). In contrast to the nonuniform deposition of products frequently obtained by spin-coating, a uniform deposition of P3HT films was achieved on flat and textured hydrophobic c-Si wafers by adjusting the deposition conditions. Similar findings were also obtained for the deposition of conductive poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) on P3HT. The c-Si/P3HT/PEDOT:PSS heterojunction solar cells exhibited efficiencies of 4.1 and 6.3% on flat and textured c-Si wafers, respectively. These findings suggest that ESD is a promising method for the uniform deposition of P3HT and PEDOT:PSS films on flat and textured hydrophobic substrates.

Enhanced performance of PEDOT:PSS/n-Si hybrid solar cell by HNO3treatment

“…However, the p-n junction is normally formed by ion implantation and annealing processes or dopant diffusion processes, both of which are very expensive and require a very high temperature (³1000 °C). Thus, organic/Si hybrid solar cells (HSCs) [1][2][3][4][5][6][7][8] have been extensively studied for low-cost Si-based photovoltaic devices, because the heterojunction between Si and the organic material can be formed by solution processes at low temperature. The commonly used organic material for the hybrid solar cell is a conjugated polymer, poly (3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS), which is transparent and conductive.…”

Efficient Organic Photovoltaic Cells Using MoO3 Hole-Transporting Layers Prepared by Simple Spin-Cast of Its Dispersion Solution in Methanol

“…Longer and/or more powerful sonication of the MoO 3 -methanol dispersion solution may make MoO 3 particles finer. Additionally, other solution-deposition methods, such as dip coating, spray coating, electrospray deposition, 23) and chemical mist deposition, 24) should be investigated to prepare a smoother and more uniform MoO 3 hole-transporting layer. In summary, a facile method of preparing an MoO 3 hole-transporting layer was developed, in which a sonicated dispersion solution of MoO 3 in methanol is used.…”