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Transparent, mixed proton/electron conducting Nafion-PEDOT:PSS composite for tandem microwire array solar water splitting devices

Fu, Harold J. and Ardo, Shane and Lewis, Nathan S. (2019) Transparent, mixed proton/electron conducting Nafion-PEDOT:PSS composite for tandem microwire array solar water splitting devices. In: 257th ACS National Meeting & Exposition, 31 March-4 April 2019, Orlando, FL. https://resolver.caltech.edu/CaltechAUTHORS:20190325-082415070

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Abstract

One proposed integrated solar water splitting device involves two ion-exchange membrane-embedded, semiconducting micro-/nanowire arrays elec. connected as a tandem. Such an elec. connection must be optically transparent, ion permeable, and adhere to each membrane-embedded array. A composite Nafion-Poly(3,4-ethylenedioxythiophene)-polystyrene sulfonate (PEDOT:PSS) film possesses excellent adhesion and charge transport properties while being more transparent than PEDOT:PSS alone. Understanding the phase-sepn. behavior between conductive and non-conductive domains via PeakForce Tunneling Atomic Force Microscopy (PF-TUNA) enables insight towards the Nafion-PEDOT interactions that explain bulk elec. properties. A percolative network of conductive PEDOT domains held by a Nafion/PSS bulk enable electron conduction while maintaining the mech. stability and proton conducting properties of Nafion. Addn. of DMSO reduces these domain sizes from mm to nm scale, producing a dramatic >10^4 fold increase in lateral cond. Nanoscale current-voltage sweeps probe the spatial variations of ohmic behavior that lead to macroscale contact resistance at composite/p-Si interfaces. The measured composite properties are input into a sensitivity anal. that guides device design via load-line anal. of a model tandem water splitting device.


Item Type:Conference or Workshop Item (Paper)
Related URLs:
URLURL TypeDescription
https://www.acs.org/content/acs/en/meetings/national-meeting.htmlOrganizationConference Website
ORCID:
AuthorORCID
Ardo, Shane0000-0001-7162-6826
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2019 American Chemical Society.
Record Number:CaltechAUTHORS:20190325-082415070
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190325-082415070
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94086
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Mar 2019 15:28
Last Modified:09 Oct 2019 04:21

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