• Matt_s Swirls

Search form

Monthly archive

Poly(sulfobetaine methacrylate)s as Electrode Modifiers for Inverted Organic Electronics

An article by Hyunbok Lee, Egle Puodziukynaite, Yue Zhang, John C. Stephenson, Lee J. Richter, Daniel A Fischer, Dean M. DeLongchamp, Todd Emrick*, and Alejandro L. Briseno* is featured in the current issue of JACS.

Dr. Hyunbok Lee et al. demonstrate the use of poly(sulfobetaine methacrylate)s (PSBMA) as solution-processible work function reducers for inverted organic electronic devices. A strong permanent dipole moment on the sulfobetaine moiety was calculated by density functional theory. PSBMA interlayers reduced the work function of metals, graphene, and poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) by over 1 eV. As a result, the performance of organic photovoltaic devices with PSBMA interlayers is significantly improved. This work makes available a new class of dipole-rich, counterion-free, pH insensitive polymer interlayers with demonstrated effectiveness in inverted devices.

December 24, 2014