Covalent organic frameworks offer a molecular platform for integrating organic units into
periodically ordered yet extended two-and three-dimensional polymers to create …

Organic (opto) electronic materials have received considerable attention due to their
applications in thin-film-transistors, light-emitting diodes, solar cells, sensors, photorefractive …

Organic photovoltaics (OPVs) promise cheap and flexible solar energy. Whereas light
generates free charges in silicon photovoltaics, excitons are normally formed in organic …

Strong excitonic effects, induced by the Coulombic interactions between photogenerated
electrons and holes, seriously hinder the generation of free charge carriers in organic …

The field of organic photovoltaics has developed rapidly over the last 2 decades, and small
solar cells with power conversion efficiencies of 13% have been demonstrated. Light …

Low-temperature solution-processed photovoltaics suffer from low efficiencies because of
poor exciton or electron-hole diffusion lengths (typically about 10 nanometers). Recent …

Blends of conjugated polymers and fullerene derivatives are prototype systems for organic
photovoltaic devices. The primary charge-generation mechanism involves a light-induced …

We report an efficiency of 6.1% for a solution-processed non-fullerene solar cell using a
helical perylene diimide (PDI) dimer as the electron acceptor. Femtosecond transient …

The electron-hole pair created via photon absorption in organic photoconversion systems
must overcome the Coulomb attraction to achieve long-range charge separation. We show …

A light COF: Two‐dimensional covalent organic frameworks of a nickel phthalocyanine have
been synthesized. Owing to well‐ordered stacking of the phthalocyanine units, the resulting …