Linking optical spectra to free charges in donor/acceptor heterojunctions: cross-correlation of transient microwave and optical spectroscopy

Abstract

The primary photoexcited species in excitonic semiconductors is a bound electron-hole pair, or exciton. An important strategy for producing separated electrons and holes in photoexcited excitonic semiconductors is the use...

Energy funneling and charge separation in CdS modified with dual cocatalysts for enhanced H2 generation

“…In contrast, energy migration in inorganic semiconductor-based materials can take place through mechanisms beyond FRET. Except for strongly-quantum-confined systems such as quantum dots or atomically-thin two-dimensional materials which are beyond the scope of this work [25,26], photogenerated electron-hole pairs can be rapidly dissociated at room temperature because of the low exciton binding energy in inorganic semiconductors [27][28][29]. Therefore, energy migration can proceed efficiently via independent electron and hole transfer events, as long as the adjacent semiconductor domains are electronically coupled [30,31] and the driving forces are provided [32,33].…”