TY  - JOUR
AU  - Sick, Torben
AU  - Hufnagel, Alexander G.
AU  - Kampmann, Jonathan
AU  - Kondofersky, Ilina
AU  - Calik, Mona
AU  - Rotter, Julian M.
AU  - Evans, Austin
AU  - Döblinger, Markus
AU  - Herbert, Simon
AU  - Peters, Kristina
AU  - Böhm, Daniel
AU  - Knochel, Paul
AU  - Medina, Dana D.
AU  - Fattakhova-Rohlfing, Dina
AU  - Bein, Thomas
TI  - Oriented Films of Conjugated 2D Covalent Organic Frameworks as Photocathodes for Water Splitting
JO  - Journal of the American Chemical Society
VL  - 140
IS  - 6
SN  - 0002-7863
CY  - Washington, DC
PB  - American Chemical Society
M1  - FZJ-2017-07929
SP  - 2085 - 2092
PY  - 2017
AB  - Light-driven water electrolysis at a semiconductor surface is a promising way to generate hydrogen from sustainable energy sources, but its efficiency is limited by the performance of available photoabsorbers. Here we report the first time investigation of covalent organic frameworks (COFs) as a new class of photoelectrodes. The presented 2D-COF structure is assembled from aromatic amine-functionalized tetraphenylethylene and thiophene dialdehyde building blocks to form conjugated polyimine sheets, which π-stack in the third dimension to create photoactive porous frameworks. Highly oriented COF films absorb light in the visible range to generate photo-excited electrons that diffuse to the surface and are transferred to the electrolyte resulting in proton reduction and hydrogen evolution. The observed photoelectrochemical activity of the 2D-COF films and their photocorrosion stability in water pave the way for a novel class of photoabsorber materials with versatile optical and electronic properties that are tunable through the selection of appropriate building blocks and their three-dimensional stacking.
LB  - PUB:(DE-HGF)16
C6  - pmid:29249151
UR  - <Go to ISI:>//WOS:000425475300025
DO  - DOI:10.1021/jacs.7b06081
UR  - https://juser.fz-juelich.de/record/840396
ER  -