Detail publikace

Understanding Photocapacitive and Photofaradaic Processes in Organic Semiconductor Photoelectrodes for Optobioelectronics

GLOWACKI, E.

Originální název

Understanding Photocapacitive and Photofaradaic Processes in Organic Semiconductor Photoelectrodes for Optobioelectronics

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Photoactive organic semiconductor substrates are envisioned as a novel class of bioelectronic devices that transduce light into stimulating biological signals with relevance for retinal implants or guided cellular differentiation. The direct interface between the semiconductor and the electrolyte gives rise to different competing optoelectronic transduction mechanisms. A detailed understanding of such faradaic or capacitive processes and the underlying material science is necessary to develop and optimize future devices. Here, the problem in organic photoelectrodes is addressed based on a planar p-n junction containing phthalocyanine (H2Pc) and N,N '-dimethyl perylenetetracarboxylic diimide (PTCDI). The detailed characterization of photoelectrochemical current transients is combined with spectroscopic measurements, impedance spectroscopy, and local photovoltage measurements to establish a model that predicts quantitatively faradaic or capacitive current transients. The decisive elements of the model are the energy levels present at the interface and the voltage building up in the photoelectrode. The result of the efforts is a comprehensive model of photocapacitive and photofaradaic effects that can be applied to developing wireless bioelectronic photostimulation devices.

Klíčová slova

bioelectronics; organic semiconductors; photoelectrodes; photostimulation; semiconductor‐ electrolyte interfaces

Autoři

GLOWACKI, E.

Vydáno

15. 2. 2021

Nakladatel

WILEY-V C H VERLAG GMBH

Místo

WEINHEIM

ISSN

1616-301X

Periodikum

ADVANCED FUNCTIONAL MATERIALS

Ročník

31

Číslo

16

Stát

Spolková republika Německo

Strany od

1

Strany do

10

Strany počet

10

URL

https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202010116

BibTex

@article{BUT171364,
  author="Eric Daniel {Glowacki}",
  title="Understanding Photocapacitive and Photofaradaic Processes in Organic Semiconductor Photoelectrodes for Optobioelectronics",
  journal="ADVANCED FUNCTIONAL MATERIALS",
  year="2021",
  volume="31",
  number="16",
  pages="1--10",
  doi="10.1002/adfm.202010116",
  issn="1616-301X",
  url="https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202010116"
}