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Title: A highly stretchable, transparent, and conductive polymer

Previous breakthroughs in stretchable electronics stem from strain engineering and nanocomposite approaches. Routes toward intrinsically stretchable molecular materials remain scarce but, if successful, will enable simpler fabrication processes, such as direct printing and coating, mechanically robust devices, and more intimate contact with objects. We report a highly stretchable conducting polymer, realized with a range of enhancers that serve a dual function: (i) they change morphology and (ii) they act as conductivity-enhancing dopants in poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). The polymer films exhibit conductivities comparable to the best reported values for PEDOT:PSS, with over 3100 S/cm under 0% strain and over 4100 S/cm under 100% strain—among the highest for reported stretchable conductors. It is highly durable under cyclic loading, with the conductivity maintained at 3600 S/cm even after 1000 cycles to 100% strain. The conductivity remained above 100 S/cm under 600% strain, with a fracture strain of 800%, which is superior to even the best silver nanowire– or carbon nanotube–based stretchable conductor films. As a result, the combination of excellent electrical and mechanical properties allowed it to serve as interconnects for field-effect transistor arrays with a device density that is five times higher than typical lithographically patterned wavy interconnects.
Authors:
 [1] ;  [1] ; ORCiD logo [1] ;  [2] ;  [1] ;  [1] ; ORCiD logo [1] ; ORCiD logo [1] ;  [1] ; ORCiD logo [1] ;  [1] ;  [3] ;  [1] ;  [2] ;  [1] ;  [1]
  1. Stanford Univ., Stanford, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); Samsung Advanced Institute of Technology, Gyeonggi-do (South Korea)
Publication Date:
Grant/Contract Number:
ID0EMNAK13699; FA9550-15-1-0106; ID0E4RAK13700; CMMI-1553638; ID0EEXAK13701; AC02-76SF00515; ID0E11AK13702
Type:
Accepted Manuscript
Journal Name:
Science Advances
Additional Journal Information:
Journal Volume: 3; Journal Issue: 3; Journal ID: ISSN 2375-2548
Publisher:
AAAS
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; stretchable electronics; conducting polymer; transparent electrode; plasticizer; ionic dopant; soft interface; rigid-island; field-effect transistors; polymer characterization; patterning
OSTI Identifier:
1390325