Orienting Organic Semiconductor Crystals for Emerging Optoelectronics | AIChE

Orienting Organic Semiconductor Crystals for Emerging Optoelectronics

Solution-based processing of optoelectronic active layers promises to drive down the manufacturing costs of emerging technologies, such as light-weight, large-area solar panels. While significant effort has focused on the molecular tuning of soluble semiconductors to improve optical and electronic properties, their performance ultimately depends on the extent and manner of crystallization as solvent rapidly evaporates during film deposition. Because organic semiconductors exhibit charge transport anisotropy along different crystallographic directions, controlling the orientation of these crystals is a key parameter in device optimization.

Recently, our group has developed a strategy to use nanoporous scaffolds to orient crystals during the earliest stages of nucleation and growth. Through judicious design of scaffold geometry with respect to crystal growth habits, we can control crystal orientations in up to two dimensions, as well as form unusually-shaped crystals through selective confinement. We are also exploring solvent-free deposition methods of crystallization that induce crystal twisting. Such twisted organic semiconductor crystals exhibit modulated out-of-plane orientations, resulting in regular oscillations in conductivity and fluorescence, as well as unique interactions with circularly polarized light.  

Webinar content is available with the kind permission of the author(s) solely for the purpose of furthering AIChE’s mission to educate, inform and improve the practice of professional chemical engineering. All other uses are forbidden without the express consent of the author(s). For permission to re-use, please contact chemepermissions@aiche.org.

Once the content has been viewed and you have attested to it, you will be able to download and print a certificate for PDH credits. If you have already viewed this content, please click here to login.
  • AIChE Pro Members - $76.00
  • Environmental Division Members - Free
  • AIChE Graduate Student Members - Free
  • AIChE Undergraduate Student Members - Free
  • AIChE Explorer Members - $109.00
  • Non-Members - $109.00
Do you already own this? Log In for instructions on accessing this content.
  • Source:
    Lehigh University
  • Language:
  • Skill Level:
  • Duration:
    1.25 hours
  • PDHs: