Ionic moieties in organic and hybrid semiconducting devices: influence on energy band structures and functions

Abstract

The interaction between ionic moieties and the electronic properties of organic and hybrid semiconductors can yield a variety of interesting and sometimes surprising effects. Ionic moieties can induce interface dipoles,...

Polymer Photoelectrodes for Solar Fuel Production: Progress and Challenges

“…Ionic functionalities have also been shown to lead to doping of organic semiconductors and can influence the energy of electronic states at the interface, which would impact function. 290 The level of understanding of OER and HER is much higher for inorganic materials than organic ones. Considering the OER, the inorganic core of the oxygen-evolving complex (OEC) in photosystem II has been intensely studied, more recently with cutting edge X-ray free-electron lasers.…”

“…Trap states must be explicitly considered to develop models with good agreement. Ionic functionalities have also been shown to lead to doping of organic semiconductors and can influence the energy of electronic states at the interface, which would impact function …”

Automatic formation of electron transport layer in BHJ solar cells using phenothiazine-based conjugated small molecular electrolytes

“…[7][8][9][10][11] In an inverted BHJ solar cell, interfacial engineering between the indium tin oxide (ITO) bottom electrode and the photoactive layer is considered a feasible method to improve the device efficiency, and modification of the electron transport layer (ETL) is a vital part of interfacial engineering. [12][13][14][15][16][17][18] ETL is a cathode interface layer and should not only form a good ohmic contact with the active layer to facilitate the collection of charges but should also have proper energy levels for efficient exciton separation and charge transport. [19][20][21][22][23][24] Zinc oxide (ZnO) is one of the most popular ETL materials because of its excellent electron mobility, high visible-light transparency, and easy preparation.…”

Guest-activated quaternary ammonium salt hosts emit room temperature phosphorescence

“…For example, researchers often use ionic compounds as dopants to prepare organic electroluminescent materials and organic conductive materials. 5 In addition, the single crystal structures of the hosts further indicate the existence of strong interactions between molecules. As shown in Fig.…”

“…1 c Most host matrices are neutral organics, while charged organic salts are rarely used as hosts. However, charged organic salts easily interact with the excitons of organic compounds, 5 which not only produces special or unexpected phosphorescence properties but also facilitates the exploration of the role of the host matrix in the doped system.…”