National University of Singapore

Cindy Guan-Yu Tang

Lay-Lay Chua

Peter Kian-Hoon Ho

Rui-Qi Png

Mervin Chun-Yi Ang

Kim-Kian Choo

A composition comprising: an organic semiconductor comprising one or more aromatic or heteroaromatic moieties; one or more cations covalently bonded to the organic semiconductor, or to a second material; and at least one anion donor selected from the class of divalent and higher valent anions; wherein the organic semiconductor has an electron affinity between 1.5 and 4.5 eV.

N-doped electrically conductive organic materials

There is provided a material comprising a n-doped electrically conductive polymer comprising at least one electron-deficient aromatic moiety, each electron-deficient aromatic moiety having a gas-phase electron affinity (E) of 1-3 eV; and at least one counter-cation covalently bonded to the polymer or to a further polymer comprised in the material, the polymer being n-doped to a charge density of 0.1-1 electron per electron-deficient aromatic moiety, the polymer being capable of forming a layer having a vacuum workfunction (WF) of 2.5-4.5 eV, and wherein all the counter-cations comprised in the material are immobilised such that any electron in the polymer cannot significantly diffuse or migrate out of the polymer. There is also provided a method of preparing the material.

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Singapore, Singapore

Cindy Guan-Yu Tang