Abstract:We provide the initial
demonstration of a general thin film deposition
technique that leverages the unique solubility properties of supercritical
fluids. The technique is the solution-phase analogue of physical vapor
deposition and allows thin films of a semiconducting polymer to be
grown without the need for in situ chemical reactions. Film growth
is approximately linear with time, indicating that film thickness
can be controlled in a straightforward manner by varying the time
of deposition. To further demons… Show more
“…Non-monotonic solubility behavior as a function of temperature was observed for both PBTTT-C 14 and isotactic polypropylene in pure n-pentane previously. 32,61 Additionally, the overall absorbance as a function of temperature for different pressures are displayed in Fig. 1 (right panel) using the total integrated intensity obtained from a fit of the data.…”
Section: Papermentioning
confidence: 99%
“…Based on our previous studies, the film thickness increases with respect to time in an approximately linear fashion, which allow us to control film thickness in a relatively straightforward manner. 32 To investigate the morphology of the PBTTT-C 14 films, a series of films were deposited in situ using p-SFD in pure n-pentane and a mixture of n-pentane: toluene (0.5% mol) at different pressures. AFM images shown in Fig.…”
Section: Papermentioning
confidence: 99%
“…We are developing a deposition method for high molecular weight materials that relies on the unique solvation properties of supercritical fluids, called physical supercritical fluid deposition (p-SFD). 32 The technique is designed to maintain the benefits of vapor phase processing and has the additional benefit of not requiring line of sight access to the surface where film formation takes place. When a solvent is at a temperature well below its critical temperature, the saturation concentration of a solid solute typically increases with temperature irrespective of the pressure.…”
Section: Introductionmentioning
confidence: 99%
“…By controlling the local temperature on a substrate, the deposition process can be directed, achieving linewidths of 5 microns, several times better than aerosol jet printing methods. 32 From an ecofriendly perspective, p-SFD has several benefits. Firstly, the process is highly atom-economical.…”
In order to develop more atom-economical deposition methods for polymer semiconductors, we investigated physical supercritical fluid deposition (p-SFD) to form thin films of a popular bithiophene semiconducting polymer (PBTTT). Depositions...
“…Non-monotonic solubility behavior as a function of temperature was observed for both PBTTT-C 14 and isotactic polypropylene in pure n-pentane previously. 32,61 Additionally, the overall absorbance as a function of temperature for different pressures are displayed in Fig. 1 (right panel) using the total integrated intensity obtained from a fit of the data.…”
Section: Papermentioning
confidence: 99%
“…Based on our previous studies, the film thickness increases with respect to time in an approximately linear fashion, which allow us to control film thickness in a relatively straightforward manner. 32 To investigate the morphology of the PBTTT-C 14 films, a series of films were deposited in situ using p-SFD in pure n-pentane and a mixture of n-pentane: toluene (0.5% mol) at different pressures. AFM images shown in Fig.…”
Section: Papermentioning
confidence: 99%
“…We are developing a deposition method for high molecular weight materials that relies on the unique solvation properties of supercritical fluids, called physical supercritical fluid deposition (p-SFD). 32 The technique is designed to maintain the benefits of vapor phase processing and has the additional benefit of not requiring line of sight access to the surface where film formation takes place. When a solvent is at a temperature well below its critical temperature, the saturation concentration of a solid solute typically increases with temperature irrespective of the pressure.…”
Section: Introductionmentioning
confidence: 99%
“…By controlling the local temperature on a substrate, the deposition process can be directed, achieving linewidths of 5 microns, several times better than aerosol jet printing methods. 32 From an ecofriendly perspective, p-SFD has several benefits. Firstly, the process is highly atom-economical.…”
In order to develop more atom-economical deposition methods for polymer semiconductors, we investigated physical supercritical fluid deposition (p-SFD) to form thin films of a popular bithiophene semiconducting polymer (PBTTT). Depositions...
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