Detail publikace

Near-infrared absorbing hydrogen-bonded dithioketopyrrolopyrrole (DTPP) n-type semiconductors

KRATOCHVIL M. CIGANEK M. YUMUSAK C. SEELAJAROEN H. CISAROVA I. FABRY J. VALA M. LUNAK S. WEITER M. SARICIFTCI N.S. KRAJCOVIC J.

Originální název

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Optical and semiconducting properties of vacuum-deposited thin films of four hydrogen-bonded pigments were studied. Well-known 1,4-diketo-3,6-diphenyl-pyrrolo-[3,4-c]-pyrrole (Ph-DPP) and 1,4-diketo-3,6-(thiophen-2yl)-pyrrolo-[3,4-c]-pyrrole (Th-DPP) were transformed to their 1,4-dithioketo heteroanalogues (Ph-DTPP and ThDTPP) using Lawesson's reagent. X-ray single crystal structure determination confirmed the presence of CS-HN hydrogen bonds and a similar stack formation in both DTPPs, leading to relatively high decomposition temperatures, about 350 degrees C. According to density functional theory (DFT) calculations, thionation left HOMO (pi-type) level almost unchanged, considerably destabilized non-bonding orbital (n-orbital) localized on thioketo group, and significantly decreased LUMO (pi*-type) energy. Evolution of HOMO and LUMO energies was confirmed by cyclic voltammetry, establishing LUMO energy at -4.5 eV for both DTPPs, while a signature of high-lying n-orbital was detected through n pi* transition in the far-red/near-infrared area of absorption spectra, interpreted with help of time dependent DFT calculations on monomer and stacked dimer geometry. The lowest optical band-gap among the pigments under study was found to be 1.4 eV for Ph-DTPP thin film. Field effect mobilities, determined on a bottom-gate top-contact transistor, show DPPs as p-type and DTPPs as n-type semiconductors. The highest electron mobility mu e = 0.018 cm2 V-1 s- 1 was obtained for Ph-DTPP film in the device with aluminium source and drain electrodes.

Klíčová slova

Organic photovoltaics; Hydrogen-bonded pigments; Dithioketopyrrolopyrrole; Diketopyrrolopyrrole; n-type semiconductors

Autoři

KRATOCHVIL M.; CIGANEK M.; YUMUSAK C.; SEELAJAROEN H.; CISAROVA I.; FABRY J.; VALA M.; LUNAK S.; WEITER M.; SARICIFTCI N.S.; KRAJCOVIC J.

Vydáno

13. 10. 2021

Nakladatel

ELSEVIER SCI LTD

Místo

OXFORD

ISSN

1873-3743

Periodikum

DYES AND PIGMENTS

Ročník

197

Číslo

Stát

Spojené království Velké Británie a Severního Irska

Strany od

109884

Strany do

109895

Strany počet

URL

https://www.sciencedirect.com/science/article/pii/S0143720821007506?via%3Dihub

BibTex

@article{BUT172990,
  author="KRATOCHVIL M. and CIGANEK M. and YUMUSAK C. and SEELAJAROEN H. and CISAROVA I. and FABRY J. and VALA M. and LUNAK S. and WEITER M. and SARICIFTCI N.S. and KRAJCOVIC J.",
  title="Near-infrared absorbing hydrogen-bonded dithioketopyrrolopyrrole (DTPP) n-type semiconductors",
  journal="DYES AND PIGMENTS",
  year="2021",
  volume="197",
  number="1",
  pages="109884--109895",
  doi="10.1016/j.dyepig.2021.109884",
  issn="1873-3743",
  url="https://www.sciencedirect.com/science/article/pii/S0143720821007506?via%3Dihub"
}